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County: Dane


Family: Acanthaceae
  Genus: Ruellia

    Ruellia humilis Nutt.*+
        fringe-leaf ruellia, hairy ruellia, hairy wild petunia, wild petunia
             Ruellia ciliosa Pursh var. longiflora A.Gray
             Ruellia humilis Nutt. var. calvescens Fernald
             Ruellia humilis Nutt. var. depauperata Tharp & F.A.Barkley
             Ruellia humilis Nutt. var. expansa Fernald
             Ruellia humilis Nutt. var. frondosa Fernald
             Ruellia humilis Nutt. var. humilis
             Ruellia humilis Nutt. var. longiflora (A.Gray) Fernald
Family: Aceraceae
  Genus: Acer

    Acer ginnala Maxim.*+
        Amur maple
             Acer tataricum L. subsp. ginnala
    Acer negundo L.
        ash-leaved maple, box elder
    Acer negundo L. var. negundo +
        box elder
             Negundo aceroides (L.) Moench
             Negundo negundo (L.) Karst.
    Acer negundo L. var. violaceum (Kirchn.) H.Jaeger+
        box elder
             Negundo aceroides (L.) Moench subsp. violaceum
    Acer nigrum F.Michx.*+
        black maple
             Acer nigrum F.Michx. var. palmeri Sarg.
             Acer saccharum Marshall subsp. nigrum
             Acer saccharum Marshall var. nigrum (F.Michx.) Britton
             Acer saccharum Marshall var. viride (Schmidt) E.Murray
             Saccharodendron nigrum (F.Michx.) Small
    Acer pensylvanicum L.*+
        goosefoot maple, moosewood, striped maple
    Acer platanoides L.*+
        Norway maple
             Acer platanoides L. var. schwedleri Nichols.
    Acer rubrum L. var. rubrum *+
        red maple
             Acer rubrum L. f. tomentosum (Desf.) Dans.
             Acer rubrum L. var. tomentosum Tausch
             Acer stenocarpum Britton
             Rufacer rubrum (L.) Small
    Acer saccharinum L.*+
        silver maple, soft maple
             Acer dasycarpum Ehrh.
             Acer saccharinum L. f. ahlesii A.Murray
             Acer saccharinum L. var. laciniatum Pax
             Acer saccharinum L. var. wieri Rehder
             Argentacer saccharinum (L.) Small
    Acer saccharum Marshall var. saccharum *+
        hard maple, sugar maple
             Acer nigrum F.Michx. var. glaucum (F.Schmidt) Fosberg
             Acer nigrum F.Michx. var. saccharophorum (K.Koch) R.T.Clausen
             Acer saccharinum Wangenh. var. glaucum F.Schmidt
             Acer saccharum Marshall f. glaucum (F.Schmidt) Pax
             Acer saccharum Marshall subsp. saccharum
             Acer saccharum Marshall var. glaucum (F.Schmidt) Sarg.
             Acer saccharophorum K.Koch
             Saccharodendron saccharum (Marshall) Moldenke
    Acer spicatum Lam.*+
        mountain maple
Family: Acoraceae
  Genus: Acorus

    Acorus americanus (Raf.) Raf.*
        sweet-flag
             Acorus calamus auct. non L.
             Acorus calamus L. var. americanus (Raf.) H.Wulff
             Acorus calamus L. var. americanus Raf.
    Acorus calamus L.*+
        sweet-flag
             Acorus americanus auct. non (Raf.) Raf.
             Acorus calamus L. var. americanus auct. non (Raf.) Raf.
Family: Agavaceae
  Genus: Yucca

    Yucca flaccida Haw.*+
        Adam's needle, beargrass, yucca
             Yucca concava Haw.
             Yucca filamentosa L. var. concava (Haw.) Baker
             Yucca filamentosa L. var. flaccida (Haw.) Engelm.
             Yucca filamentosa L. var. glaucescens (Haw.) Baker
             Yucca filamentosa L. var. puberula (Haw.) Baker
             Yucca filamentosa L. var. smalliana (Fernald) Ahles
             Yucca flaccida Haw. var. glaucescens (Haw.) Trel.
             Yucca flaccida Haw. var. major (Baker) Rehder
             Yucca freemanii Shinners
             Yucca glaucescens Haw.
             Yucca louisianensis Trel.
             Yucca orchioides Carričre var. major Baker
             Yucca puberula Haw.
             Yucca smalliana Fernald
Family: Alismataceae
  Genus: Alisma

    Alisma subcordatum Raf.*+
        American water-plantain, common water-plantain, southern water-plantain
             Alisma parviflorum Pursh
             Alisma plantago-aquatica L. subsp. subcordatum
             Alisma plantago-aquatica L. var. parviflorum (Pursh) Torr.
    Alisma triviale Pursh*+
        northern water-plantain
             Alisma brevipes Greene
             Alisma plantago-aquatica L. subsp. brevipes
             Alisma plantago-aquatica L. var. americanum Schult.
             Alisma plantago-aquatica L. var. brevipes (Greene) Vict.
  Genus: Sagittaria

    Sagittaria cristata Engelm.*+
        crested arrowhead
             Sagittaria graminea Michx. var. cristata (Engelm.) Bogin
    Sagittaria cuneata E.Sheld.*+
        arum-leaved arrowhead, northern arrowhead, wapato
             Sagittaria arifolia Nutt. ex J.G.Sm.
    Sagittaria latifolia Willd.*+
        broad-leaved arrowhead, common arrowhead, duck-potato, wapato
             Sagittaria chinensis Pursh
             Sagittaria esculenta T.J.Howell
             Sagittaria latifolia Willd. f. gracilis (Pursh) B.L.Rob.
             Sagittaria latifolia Willd. f. hastata (Pursh) B.L.Rob.
             Sagittaria latifolia Willd. var. latifolia
             Sagittaria latifolia Willd. var. obtusa (Muhl. ex Willd.) Wiegand
             Sagittaria latifolia Willd. var. pubescens (Muhl. ex Nutt.) J.G.Sm.
             Sagittaria obtusa Muhl. ex Willd., non Thunb.
             Sagittaria ornithorhyncha Small
             Sagittaria planipes Fernald
             Sagittaria variabilis Engelm. var. obtusa (Muhl. ex Willd.) Engelm.
             Sagittaria viscosa C.Mohr, pro parte
    Sagittaria rigida Pursh*+
        sessile-fruited arrowhead, stiff arrowhead
             Sagittaria heterophylla Pursh
             Sagittaria heterophylla Pursh f. elliptica (Engelm.) S.F.Blake
             Sagittaria heterophylla Pursh f. fluitans (Engelm.) S.F.Blake
             Sagittaria heterophylla Pursh f. rigida (Pursh) S.F.Blake
             Sagittaria rigida Pursh f. elliptica (Engelm.) Fernald
             Sagittaria rigida Pursh f. fluitans (Engelm.) Fernald
Family: Amaranthaceae
  Genus: Amaranthus

    Amaranthus albus L.*+
        prostrate pigweed, tumble pigweed, tumbleweed, tumbleweed amaranth, white amaranth
             Amaranthus albus L. var. pubescens (Uline & W.L.Bray) Fernald
             Amaranthus graecizans auct. non L.
             Amaranthus graecizans L. var. pubescens Uline & W.L.Bray
             Amaranthus pubescens (Uline & W.L.Bray) Rydb.
    Amaranthus blitoides S.Watson*+
        creeping amaranth, mat amaranth, matweed, matweed amaranth, prostratre amaranth, prostrate pigweed
             Amaranthus graecizans auct. non L.
    Amaranthus caudatus L.*+
        foxtail amaranth, love-lies-bleeding, purple amaranth
             Amaranthus edulis Speg.
             Amaranthus sanguineus L.
    Amaranthus caudatus L. X A. hybridus L.+
    Amaranthus cruentus L.+
        blood amaranth, caterpillar amaranth, purple amaranth, red amaranth
             Amaranthus hybridus L. subsp. cruentus
             Amaranthus hybridus L. var. cruentus (L.) Moq.
             Amaranthus paniculatus L.
    Amaranthus hybridus L.*+
        green amaranth, green pigweed, smooth amaranth, smooth pigweed
             Amaranthus chlorostachys Willd.
             Amaranthus incurvatus Tim. ex Gren. & Godr.
             Amaranthus patulus Bertol.
    Amaranthus hypochondriacus L.*+
        prince's-feather, prince's-feather amaranth, Prince-of-Wales'-feather
             Amaranthus flavus L.
             Amaranthus hybridus L. subsp. hypochondriacus
             Amaranthus leucocarpus S.Watson
    Amaranthus powellii S.Watson*+
        green amaranth, Powell's amaranth, Powell's smooth amaranth, tall amaranth
             Amaranthus bouchonii Thell.
             Amaranthus bracteosus Uline & W.L.Bray
             Amaranthus retroflexus L. var. powellii (S.Watson) B.Boivin
    Amaranthus powellii S.Watson X A. retroflexus L.+
             Amaranthus retroflexus L. X A. powellii S.Watson
    Amaranthus powellii S.Watson X A. tuberculatus (Moq.) J.D.Sauer+
    Amaranthus retroflexus L.*+
        common amaranth, pigweed, redroot, rough amaranth, rough pigweed, wild-beet amaranth
             Amaranthus retroflexus L. var. salicifolius I.M.Johnst.
    Amaranthus retroflexus L. X A. tuberculatus (Moq.) J.D.Sauer+
    Amaranthus tuberculatus (Moq.) J.D.Sauer*+
        rough-fruited amaranth, rough-fruited water-hemp, tall water-hemp
             Acnida altissima Riddell ex Moq.
             Acnida altissima Riddell ex Moq. var. prostrata (Uline & W.L.Bray) Fernald
             Acnida altissima Riddell ex Moq. var. subnuda (S.Watson) Fernald
             Acnida concatenata (Moq.) Small
             Acnida subnuda (S.Watson) Standl.
             Acnida tamariscina (Nutt.) A.W.Wood
             Acnida tamariscina (Nutt.) A.W.Wood var. concatenata (Moq.) Uline & W.L.Bray
             Acnida tamariscina (Nutt.) A.W.Wood var. prostrata Uline & W.L.Bray
             Acnida tamariscina (Nutt.) A.W.Wood var. tuberculata (Moq.) Uline & W.L.Bray
             Acnida tuberculata Moq.
             Acnida tuberculata Moq. var. prostrata (Uline & W.L.Bray) B.L.Rob.
             Acnida tuberculata Moq. var. subnuda S.Watson
             Amaranthus altissimus Riddell
             Amaranthus ambigens Standl.
             Amaranthus cannabinus L. var. concatenata Moq.
             Amaranthus rudis J.D.Sauer
             Amaranthus tamariscinus Nutt.
             Amaranthus tuberculatus (Moq.) J.D.Sauer var. prostratus (Uline & W.L.Bray) B.L.Rob.
             Amaranthus tuberculatus (Moq.) J.D.Sauer var. subnudus S.Watson
  Genus: Froelichia

    Froelichia floridana (Nutt.) Moq.*+
        common cotton-weed, Florida snake-cotton, plains snake-cotton
             Froelichia campestris Small
             Froelichia floridana (Nutt.) Moq. var. campestris (Small) Fernald
             Froelichia floridana (Nutt.) Moq. var. floridana
             Froelichia floridana (Nutt.) Moq. var. pallescens Moq.
             Oplotheca floridana Nutt.
Family: Anacardiaceae
  Genus: Rhus

    Rhus aromatica Aiton*+
        fragrant sumac, squaw-bush
    Rhus aromatica Aiton var. aromatica +
        fragrant sumac, squaw-bush
             Rhus aromatica Aiton var. illinoensis (Greene) Rehder
             Rhus canadensis Marshall var. illinoensis (Greene) Fernald
             Schmaltzia crenata (Mill.) Greene
             Schmaltzia illinoensis Greene
             Toxicodendron crenatum Mill.
    Rhus glabra L.*+
        smooth sumac
             Rhus borealis Greene
             Rhus calophylla Greene
             Rhus glabra L. var. laciniata Carričre
             Rhus glabra L. var. occidentalis Torr.
    Rhus hirta (L.) Sudw.*+
        staghorn sumac, velvet sumac
             Datisca hirta L.
             Rhus typhina L.
             Rhus typhina L. f. dissecta Rehder
             Rhus typhina L. var. laciniata A.W.Wood
    Rhus X pulvinata Greene (pro sp.) X +
        hybrid sumac, northern sumac, pulvinate sumac
             Rhus glabra L. var. borealis Britton
             Rhus pulvinata Greene
             Rhus X borealis (Britton) Gleason (emended) X
  Genus: Toxicodendron

    Toxicodendron radicans (L.) Kuntze subsp. negundo*+
        common eastern poison-ivy, poison-ivy
             Toxicodendron negundo Greene
             Toxicodendron radicans (L.) Kuntze var. negundo (Greene) Reveal
    Toxicodendron rydbergii (Small ex Rydb.) Greene*+
        Rydberg's poison-ivy, western poison-ivy
             Rhus radicans L. var. rydbergii (Small ex Rydb.) Rehder
             Rhus radicans L. var. vulgaris (Michx.) DC.
             Rhus rydbergii Small ex Rydb. (pro parte)
             Rhus toxicodendron L. var. vulgaris Michx.
             Toxicodendron desertorum Lunell
             Toxicodendron fothergilloides Lunell
             Toxicodendron radicans (L.) Kuntze var. rydbergii (Small ex Rydb.) Erskine
    Toxicodendron vernix (L.) Kuntze*+
        poison sumac, swamp sumac
             Rhus vernix L.
Family: Annonaceae
  Genus: Asimina

    Asimina triloba (L.) Dunal*
        pawpaw
Family: Apiaceae
  Genus: Aegopodium

    Aegopodium podagraria L.*+
        bishop's gout-weed, gout-weed
             Aegopodium podagraria L. var. variegatum L.H.Bailey
  Genus: Aethusa

    Aethusa cynapium L.*+
        fool's-parsley
  Genus: Anethum

    Anethum graveolens L.*+
        dill
  Genus: Angelica

    Angelica atropurpurea L.*+
        common great angelica, great angelica, purple-stem angelica
    Angelica atropurpurea L. var. atropurpurea +
        common great angelica, great angelica, purple-stem angelica
    Angelica atropurpurea L. var. occidentalis Fassett+
        purple-stem angelica, western great angelica
  Genus: Anthriscus

    Anthriscus sylvestris (L.) Hoffm.+
        wild chervil
             Chaerophyllum sylvestre L.
  Genus: Berula

    Berula erecta (Huds.) Coville*+
        cut-leaved water-parsnip, low water-parsnip
             Berula erecta (Huds.) Coville var. incisa (Torr.) Cronquist
             Berula incisa (Torr.) G.N.Jones
             Berula pusilla (Nutt. ex Torr. & A.Gray) Fernald
             Siella erecta (Huds.) Pimenov
             Sium erectum Huds.
             Sium incisum Torr.
             Sium pusillum Nutt. ex Torr. & A.Gray
  Genus: Carum

    Carum carvi L.*+
        caraway
             Carum velenovskyi Rohlena
  Genus: Cicuta

    Cicuta bulbifera L.*+
        bulblet water-hemlock
    Cicuta maculata L.*+
        common water-hemlock, spotted water-hemlock
  Genus: Conium

    Conium maculatum L.+
        poison-hemlock
  Genus: Cryptotaenia

    Cryptotaenia canadensis (L.) DC.*+
        Canadian honewort, white chervil
             Deringa canadensis (L.) Kuntze
  Genus: Daucus

    Daucus carota L.*+
        Queen Anne's-lace, wild carrot
             Daucus carota L. f. epurpuratus Farw.
  Genus: Eryngium

    Eryngium planum L.*+
        plains eryngo
    Eryngium yuccifolium Michx.*+
        button eryngo, rattlesnake-master
  Genus: Falcaria

    Falcaria vulgaris Bernh.+
        sickle-weed
             Falcaria sioides (Wibel) Asch.
  Genus: Heracleum

    Heracleum lanatum Michx.*+
        American cow-parsnip
             Heracleum maximum W.Bartram
             Heracleum sphondylium L. subsp. montanum
             Heracleum sphondylium L. var. lanatum (Michx.) Dorn
  Genus: Osmorhiza

    Osmorhiza claytonii (Michx.) C.B.Clarke*+
        bland sweet cicely, Clayton's sweet-root, hairy sweet cicely
             Myrrhis claytonii Michx.
             Osmorhiza aristata (Thunb.) Makino var. brevistylis (DC.) B.Boivin
             Osmorhiza brevistylis DC.
             Washingtonia claytonii (Michx.) Britton
    Osmorhiza longistylis (Torr.) DC.*+
        anise-root, long-styled sweet cicely, long-styled sweet-root, smooth sweet cicely
             Myrrhis longistylis Torr.
             Osmorhiza aristata (Thunb.) Makino var. longistylis (Torr.) B.Boivin
             Osmorhiza longistylis (Torr.) DC. var. brachycoma S.F.Blake
             Osmorhiza longistylis (Torr.) DC. var. imbarbata Salamun
             Osmorhiza longistylis (Torr.) DC. var. villicaulis Fernald
             Washingtonia longistylis (Torr.) Britton
  Genus: Oxypolis

    Oxypolis rigidior (L.) Raf.*+
        common water-dropwort, stiff cowbane
             Oenanthe ambigua Nutt.
             Oxypolis longifolia (Pursh) Small
             Oxypolis rigidior (L.) Raf. var. ambigua (Nutt.) B.L.Rob.
             Oxypolis rigidior (L.) Raf. var. longifolia (Pursh) Britton
             Oxypolis turgida Small
  Genus: Pastinaca

    Pastinaca sativa L.*+
        wild parsnip
  Genus: Polytaenia

    Polytaenia nuttallii DC.*+
        Nuttall's prairie-parsley, prairie-parsley
             Pleiotaenia nuttallii (DC.) J.M.Coult. & Rose
  Genus: Sanicula

    Sanicula gregaria E.P.Bicknell*+
        clustered black snakeroot
             Sanicula odorata (Raf.) K.M.Pryer & L.R.Phillippe
             Triclinium odoratum Raf.
    Sanicula marilandica L.*+
        black snakeroot, Maryland sanicle
             Sanicula marilandica L. var. petiolulata Fernald
  Genus: Sium

    Sium suave Walter*+
        hemlock water-parsnip, water-parsnip
             Sium cicutaefolium Schrank
             Sium floridanum Small
             Sium suave Walter var. floridanum (Small) C.F.Reed
  Genus: Taenidia

    Taenidia integerrima (L.) Drude*+
        yellow-pimpernel
             Smyrnium integerrimum L.
  Genus: Thaspium

    Thaspium trifoliatum (L.) A.Gray var. flavum S.F.Blake*+
        purple meadow-parsnip, smooth meadow-parsnip
             Thaspium aureum (L.) Nutt.
             Thaspium trifoliatum (L.) A.Gray var. aureum (L.) Britton
  Genus: Torilis

    Torilis japonica (Houtt.) DC.*+
        erect hedge-parsley, Japanese hedge-parsley
             Torilis anthriscus C.C.Gmel. non Gaertn.
             Torilis rubella Moench
  Genus: Zizia

    Zizia aptera (A.Gray) Fernald*+
        heart-leaved golden alexanders, heart-leaved meadow-parsnip
             Thaspium trifoliatum (L.) A.Gray var. apterum A.Gray
             Zizia cordata W.D.J.Koch ex DC.
             Zizia aptera (A.Gray) Fernald var. aptera
             Zizia aptera (A.Gray) Fernald var. occidentalis Fernald
    Zizia aurea (L.) W.D.J.Koch*+
        common golden alexanders, golden alexanders, golden zizia
             Smyrnium aureum L.
Family: Apocynaceae
  Genus: Apocynum

    Apocynum androsaemifolium L.*+
        spreading dogbane
             Apocynum androsaemifolium L. var. incanum A.DC. subsp. androsaemifolium
             Apocynum pumilum (A.Gray) Greene var. rhomboideum (Greene) Bég. & Bél.
             Apocynum scopulorum Greene ex Rydb.
    Apocynum cannabinum L.*+
        hemp-dogbane, Indian hemp
             Apocynum album Greene var. hypericifolium A.Gray
             Apocynum cannabinum L. var. angustifolium (Wooton) N.H.Holmgren
             Apocynum cannabinum L. var. glaberrimum A.DC.
             Apocynum cannabinum L. var. greeneanum (Bég. & Bél.) Woodson
             Apocynum cannabinum L. var. nemorale (G.S.Mill.) Fernald
             Apocynum cannabinum L. var. pubescens (Mitch. ex R.Br.) A.DC.
             Apocynum cannabinum L. var. suksdorfii (Greene) Bég. & Bél.
             Apocynum pubescens Mitch. ex R.Br.
             Apocynum suksdorfii Greene
             Apocynum suksdorfii Greene var. angustifolium (Wooton) Woodson
    Apocynum sibiricum Jacq.*+
        clasping dogbane, Indian hemp
             Apocynum cannabinum L. var. hypericifolium (Aiton) A.Gray
             Apocynum hypericifolium Aiton
             Apocynum sibiricum Jacq. var. cordigerum (Greene) Fernald
             Apocynum sibiricum Jacq. var. farwellii (Greene) Fernald
             Apocynum sibiricum Jacq. var. salignum (Greene) Fernald
  Genus: Vinca

    Vinca minor L.*+
        greater periwinkle, periwinkle, running-myrtle
Family: Aquifoliaceae
  Genus: Ilex

    Ilex verticillata (L.) A.Gray*+
        common winterberry
             Ilex bronxensis Britton
             Ilex fastigiata E.P.Bicknell
             Ilex verticillata (L.) A.Gray subsp. tenuifolia
             Ilex verticillata (L.) A.Gray var. cyclophylla B.L.Rob.
             Ilex verticillata (L.) A.Gray var. fastigiata (E.P.Bicknell) Fernald
             Ilex verticillata (L.) A.Gray var. padifolia (Willd.) Torr. & A.Gray ex S.Watson
             Ilex verticillata (L.) A.Gray var. tenuifolia (Torr.) S.Watson
             Ilex verticillata (L.) A.Gray var. verticillata
             Prinos padifolius Willd.
             Prinos verticillatus L.
             Prinos verticillatus L. var. tenuifolius Torr.
Family: Araceae
  Genus: Arisaema

    Arisaema dracontium (L.) Schott*+
        dragon-root, green dragon
             Arum dracontium L.
             Muricauda dracontium (L.) Small
    Arisaema triphyllum (L.) Schott subsp. triphyllum*+
        Indian turnip, Jack-in-the-pulpit
             Arisaema atrorubens (Aiton) Blume
             Arisaema atrorubens (Aiton) Blume f. viride (Engl.) Fernald
             Arisaema atrorubens (Aiton) Blume f. zebrinum (Sims.) Fernald
             Arisaema triphyllum (L.) Schott f. viride (Engl.) Farw.
             Arisaema triphyllum (L.) Schott var. triphyllum
  Genus: Symplocarpus

    Symplocarpus foetidus (L.) Salisb. ex W.P.C.Barton*+
        skunk-cabbage
             Dracontium foetidum L.
             Spathyema foetida (L.) Raf.
Family: Araliaceae
  Genus: Aralia

    Aralia elata (Miq.) Seem.*+
        Hercules-club
             Aralia spinosa auct. non L.
             Dimorphanthus elatus Miq.
    Aralia nudicaulis L.*+
        wild sarsaparilla
    Aralia racemosa L.*+
        American spikenard, life-of-man
             Aralia racemosa L. subsp. racemosa
  Genus: Kalopanax

    Kalopanax septemlobus (Thunb. ex A.Murray) Koidz.
        castor aralia
             Kalopanax pictus (Thunb.) Nakai
Family: Aristolochiaceae
  Genus: Aristolochia

    Aristolochia tomentosa Sims
        pipe-vine, woolly Dutchman's-pipe
             Isotrema tomentosa (Sims) H.Huber
  Genus: Asarum

    Asarum canadense L.*+
        Canadian wild-ginger, wild-ginger
             Asarum acuminatum (Ashe) E.P.Bicknell
             Asarum canadense L. var. acuminatum Ashe
             Asarum canadense L. f. prattii Fassett var. acuminatum Ashe
             Asarum canadense L. var. ambiguum (E.P.Bicknell) Farw.
             Asarum canadense L. var. canadense
             Asarum canadense L. var. reflexum (E.P.Bicknell) B.L.Rob.
             Asarum reflexum E.P.Bicknell
             Asarum reflexum E.P.Bicknell var. ambiguum E.P.Bicknell
             Asarum rubrocinctum Peattie
Family: Asclepiadaceae
  Genus: Asclepias

    Asclepias amplexicaulis Sm.*+
        clasping milkweed, sand milkweed
    Asclepias exaltata L.*+
        poke milkweed, tall milkweed
             Asclepias bicknellii Vail
             Asclepias phytolaccoides Pursh
    Asclepias hirtella (Pennell) Woodson*+
        prairie milkweed, tall green milkweed
             Acerates hirtella Pennell
             Asclepias longifolia Michx. var. hirtella (Pennell) Farmer & Bell
    Asclepias incarnata L. subsp. incarnata*+
        swamp milkweed
             Asclepias incarnata L. var. incarnata
    Asclepias lanuginosa Nutt.*+
        side-cluster milkweed, woolly milkweed
             Acerates lanuginosa (Nutt.) Decne.
             Acerates monocephala Lapham ex A.Gray
             Asclepias nuttalliana Torr.
             Asclepias otarioides auct. non E.Fourn.
    Asclepias ovalifolia Decne.*+
        dwarf milkweed, oval milkweed, oval-leaved milkweed
    Asclepias purpurascens L.*+
        purple milkweed
    Asclepias sullivantii Engelm. ex A.Gray*+
        prairie milkweed, smooth milkweed, Sullivant's milkweed
    Asclepias syriaca L.*+
        common milkweed, silkweed
             Asclepias intermedia Vail
             Asclepias kansana Vail
             Asclepias syriaca L. var. kansana (Vail) E.J.Palmer & Steyerm.
    Asclepias tuberosa L. subsp. interior*+
        butterfly milkweed, butterfly-weed, orange milkweed
             Asclepias tuberosa L. subsp. terminalis
             Asclepias tuberosa L. var. interior (Woodson) Shinners
    Asclepias verticillata L.*+
        whorled milkweed
    Asclepias viridiflora Raf.*+
        short green milkweed
             Acerates viridiflora (Raf.) Pursh ex Eaton
             Acerates viridiflora (Raf.) Pursh ex Eaton var. ivesii Britton
             Acerates viridiflora (Raf.) Pursh ex Eaton var. linearis A.Gray
             Asclepias lanceolata Ives
             Asclepias viridiflora Raf. var. lanceolata (Ives) Torr.
             Asclepias viridiflora Raf. var. linearis (A.Gray) Fernald
Family: Aspleniaceae
  Genus: Asplenium

    Asplenium platyneuron (L.) Britton, Sterns & Poggenb.*+
        ebony spleenwort
             Asplenium platyneuron (L.) Britton, Sterns & Poggenb. var. bacculum-rubrum (Featherm.) Fernald
             Asplenium platyneuron (L.) Britton, Sterns & Poggenb. var. incisum (Howe) B.L.Rob.
             Asplenium platyneuron (L.) Britton, Sterns & Poggenb. var. platyneuron
             Acrostichum platyneuron L.
    Asplenium rhizophyllum L.*+
        walking fern
             Camptosorus rhizophyllus (L.) Link
Family: Asteraceae
  Genus: Achillea

    Achillea millefolium L.*+
        common yarrow, milfoil
    Achillea millefolium L. subsp. lanulosa+
        common yarrow, milfoil
             Achillea angustissima Rydb.
             Achillea aspleniifolia auct. non Vent.
             Achillea eradiata Piper
             Achillea gracilis Raf.
             Achillea lanulosa Nutt.
             Achillea lanulosa Nutt. f. peroutkyi F.C.Seymour
             Achillea lanulosa Nutt. f. rubicunda Farw.
             Achillea lanulosa Nutt. subsp. typica
             Achillea lanulosa Nutt. var. arachnoidea Lunell
             Achillea lanulosa Nutt. var. eradiata (Piper) M.Peck
             Achillea laxiflora Pollard & Cockerell
             Achillea millefolium L. f. rubicunda Farw. subsp. lanulosa
             Achillea millefolium L. subsp. occidentalis
             Achillea millefolium L. subsp. pallidotegula
             Achillea millefolium L. var. aspleniifolia (Vent.) Farw.
             Achillea millefolium L. var. gracilis Raf. ex DC.
             Achillea millefolium L. var. lanulosa (Nutt.) Piper
             Achillea millefolium L. var. occidentalis DC.
             Achillea millefolium L. var. rosea (Desf.) Torr. & A.Gray
             Achillea millefolium L. var. russeolata B.Boivin
             Achillea occidentalis (DC.) Raf. ex Rydb.
             Achillea rosea Desf.
             Achillea tomentosa Pursh, non L.
    Achillea millefolium L. subsp. millefolium+
        common yarrow, milfoil
             Achillea millefolium L. var. millefolium
    Achillea ptarmica L.*+
        sneezeweed, sneezewort
  Genus: Ambrosia

    Ambrosia artemisiifolia L.*+
        annual bur-sage, common ragweed, short ragweed
             Ambrosia artemisiifolia L. var. elatior (L.) Descourt.
             Ambrosia artemisiifolia L. f. villosa Fernald & Griscom var. elatior (L.) Descourt.
             Ambrosia elatior L.
             Ambrosia media Rydb.
    Ambrosia psilostachya DC.*+
        perennial ragweed, western ragweed
             Ambrosia californica Rydb.
             Ambrosia coronopifolia Torr. & A.Gray
             Ambrosia coronopifolia Torr. & A.Gray var. asperula A.Gray
             Ambrosia coronopifolia Torr. & A.Gray var. gracilis A.Gray
             Ambrosia cumanensis Kunth
             Ambrosia lindheimeriana Scheele
             Ambrosia psilostachya DC. var. californica (Rydb.) S.F.Blake
             Ambrosia psilostachya DC. var. coronopifolia (Torr. & A.Gray) Farw. ex Fernald
             Ambrosia psilostachya DC. var. lindheimeriana (Scheele) Blank.
             Ambrosia rugelii Rydb.
    Ambrosia trifida L. var. trifida *+
        giant ragweed, great ragweed, horse-cane
             Ambrosia integrifolia Muhl. ex Willd.
             Ambrosia striata Rydb.
             Ambrosia trifida L. var. integrifolia (Muhl. ex Willd.) Torr. & A.Gray
             Ambrosia variabilis Rydb.
  Genus: Anaphalis

    Anaphalis margaritacea (L.) Benth. & Hook.f.*+
        pearly everlasting, western pearly everlasting
             Anaphalis margaritacea (L.) Benth. & Hook.f. subsp. angustior
             Anaphalis margaritacea (L.) Benth. & Hook.f. var. angustior (Miq.) Nakai
             Anaphalis margaritacea (L.) Benth. & Hook.f. var. intercedens Hara
             Anaphalis margaritacea (L.) Benth. & Hook.f. var. occidentalis Greene
             Anaphalis margaritacea (L.) Benth. & Hook.f. var. revoluta Suksd.
             Anaphalis margaritacea (L.) Benth. & Hook.f. var. subalpina A.Gray
             Anaphalis occidentalis (Greene) Heller
             Antennaria cinnamomea C.B.Clarke var. angustior Miq.
             Gnaphalium margaritaceum L.
  Genus: Antennaria

    Antennaria howellii Greene subsp. neodioica+
        field pussy-toes, Howell's pussy-toes
             Antennaria neglecta Greene var. attenuata (Fernald) Cronquist
             Antennaria neglecta Greene var. neodioica (Greene) Cronquist
             Antennaria neodioica Greene
             Antennaria neodioica Greene subsp. neodioica
             Antennaria neodioica Greene var. attenuata Fernald
             Antennaria neodioica Greene var. chlorophylla Fernald
             Antennaria neodioica Greene var. grandis Fernald
             Antennaria neodioica Greene var. interjecta Fernald
             Antennaria neodioica Greene var. typica Fernald
             Antennaria rhodantha Fernald
             Antennaria rupicola Fernald
             Antennaria russellii B.Boivin
    Antennaria howellii Greene subsp. petaloidea+
        Howell's pussy-toes, small pussy-toes
             Antennaria appendiculata Fernald
             Antennaria concolor Piper
             Antennaria neglecta Greene var. petaloidea (Fernald) Cronquist
             Antennaria neglecta Greene var. subcorymbosa Fernald
             Antennaria neodioica Greene subsp. petaloidea
             Antennaria neodioica Greene var. petaloidea Fernald
             Antennaria petaloidea Fernald
             Antennaria petaloidea (Fernald) Fernald var. noveboracensis Fernald
             Antennaria petaloidea (Fernald) Fernald var. scariosa Fernald
             Antennaria petaloidea (Fernald) Fernald var. subcorymbosa (Fernald) Fernald
             Antennaria stenolepis Greene
    Antennaria neglecta Greene*+
        cat's-foot, field pussy-toes
             Antennaria angustiarum Lunell
             Antennaria athabascensis Greene
             Antennaria campestris Rydb.
             Antennaria campestris Rydb. var. athabascensis (Greene) B.Boivin
             Antennaria chelonica Lunell
             Antennaria erosa Greene
             Antennaria howellii Greene var. athabascensis (Greene) B.Boivin
             Antennaria howellii Greene var. campestris (Rydb.) B.Boivin
             Antennaria longifolia Greene
             Antennaria lunellii Greene
             Antennaria nebraskensis Greene
             Antennaria neglecta Greene var. athabascensis (Greene) Roy L.Taylor & MacBryde
             Antennaria neglecta Greene var. campestris (Rydb.) Steyerm.
             Antennaria neglecta Greene var. neglecta
             Antennaria parvula Greene
             Antennaria wilsonii Greene
    Antennaria parlinii Fernald subsp. fallax+
        Parlin's pussy-toes, plantain pussy-toes
             Antennaria ambigens (Greene) Fernald
             Antennaria ampla Bush
             Antennaria arkansana Greene
             Antennaria arnoglossa Greene var. ambigens Greene
             Antennaria bifrons Greene
             Antennaria brainerdii Greene
             Antennaria calophylla Greene
             Antennaria fallax Greene
             Antennaria fallax Greene var. calophylla (Greene) Fernald
             Antennaria farwellii Greene
             Antennaria greenei Bush
             Antennaria mesochora Greene
             Antennaria munda Fernald
             Antennaria obovata E.E.Nelson
             Antennaria occidentalis Greene
             Antennaria parlinii Fernald var. ambigens (Greene) Fernald
             Antennaria parlinii Fernald var. farwellii (Greene) B.Boivin
             Antennaria plantaginifolia (L.) Richardson var. ambigens (Greene) Cronquist
             Antennaria umbellata Greene
    Antennaria parlinii Fernald subsp. parlinii+
        Parlin's pussy-toes, plantain pussy-toes
             Antennaria arnoglossa Greene
             Antennaria parlinii Fernald var. arnoglossa (Greene) Fernald
             Antennaria plantaginifolia (L.) Richardson var. arnoglossa (Greene) Cronquist
             Antennaria plantaginifolia (L.) Richardson var. parlinii (Fernald) Cronquist
    Antennaria plantaginifolia (L.) Richardson*+
        plantain pussy-toes, plantain-leaved pussy-toes, woman's-tobacco
             Antennaria caroliniana Rydb.
             Antennaria decipiens Greene
             Antennaria denikeana B.Boivin
             Antennaria nemoralis Greene
             Antennaria petiolata Fernald
             Antennaria pinetorum Greene
             Antennaria plantaginifolia (L.) Richardson var. petiolata (Fernald) A.Heller
             Antennaria plantaginifolia (L.) Richardson var. plantaginifolia
             Gnaphalium plantaginifolium L.
  Genus: Anthemis

    Anthemis cotula L.*+
        dog-fennel, mayweed, stinking chamomile, stinking-cotula
             Maruta cotula (L.) DC.
    Anthemis tinctoria L.*+
        golden marguerite, yellow cotula, yellow chamomile
             Cota tinctoria (L.) J.Gay
  Genus: Arctium

    Arctium lappa L.*+
        great burdock
             Lappa major Gaertn.
    Arctium minus Bernh.*+
        common burdock, lesser burdock
             Arctium minus Bernh. f. laciniatum Clute
             Lappa minor Hill
    Arctium tomentosum Mill.+
        cotton burdock, hairy burdock, woolly burdock
  Genus: Arnoglossum

    Arnoglossum atriplicifolium (L.) H.Rob.*+
        pale Indian-plantain
             Cacalia atriplicifolia L.
             Cacalia rotundifolia (Raf.) House
             Mesadenia atriplicifolia (L.) Raf.
    Arnoglossum plantagineum Raf.*+
        prairie Indian-plantain
             Cacalia paniculata Raf.
             Cacalia plantaginea (Raf.) Shinners
             Cacalia pteranthes Raf.
             Cacalia tuberosa Nutt.
             Mesadenia tuberosa (Nutt.) Britton
  Genus: Artemisia

    Artemisia abrotanum L.
        garden sagebrush, southernwood
             Artemisia procera Willd.
    Artemisia absinthium L.+
        absinth sage-wort, absinth wormwood, absinthe, common wormwood, sage-wort
    Artemisia annua L.*+
        annual sage-wort, sweet wormwood
    Artemisia biennis Willd.*+
        biennial sage-wort, biennial wormwood
    Artemisia campestris L. subsp. caudata*+
        field sage-wort, field wormwood
             Artemisia campestris L. var. caudata (Michx.) E.J.Palmer & Steyerm.
             Artemisia caudata Michx.
             Artemisia caudata Michx. var. calvens Lunell
             Artemisia forwoodii S.Watson
             Oligosporus campestris (L.) Cass. subsp. caudatus
    Artemisia dracunculus L.*+
        dragon sage-wort, dragon wormwood, estragon, false tarragon
             Artemisia dracunculoides Pursh
             Artemisia dracunculina S.Watson
             Artemisia dracunculus L. subsp. dracunculus
             Artemisia dracunculus L. subsp. dracunculina
             Artemisia dracunculus L. subsp. glauca
             Artemisia dracunculoides Pursh var. dracunculina (S.Watson) S.F.Blake
             Artemisia dracunculus L. var. glauca (Pall. ex Willd.) Besser
             Artemisia glauca Pall. ex Willd.
             Artemisia glauca Pall. ex Willd. var. dracunculina (S.Watson) Fernald
             Oligosporus dracunculus (L.) Poljakov
             Oligosporus dracunculus (L.) Poljakov subsp. dracunculinus
             Oligosporus dracunculus (L.) Poljakov subsp. glaucus
    Artemisia ludoviciana Nutt. subsp. ludoviciana*+
        Louisiana sage-wort, western mugwort, white sage
             Artemisia brittonii Rydb.
             Artemisia diversifolia Rydb.
             Artemisia gnaphalodes Nutt.
             Artemisia herriotii Rydb.
             Artemisia ludoviciana Nutt. subsp. typica
             Artemisia ludoviciana Nutt. var. americana (Besser) Fernald
             Artemisia ludoviciana Nutt. var. brittonii (Rydb.) Fernald
             Artemisia ludoviciana Nutt. var. gnaphalodes (Nutt.) Torr. & A.Gray
             Artemisia ludoviciana Nutt. var. latifolia (Besser) Torr. & A.Gray
             Artemisia ludoviciana Nutt. var. ludoviciana
             Artemisia ludoviciana Nutt. var. pabularis (A.Nelson) Fernald
             Artemisia pabularis (A.Nelson) Rydb.
             Artemisia purshiana Besser
             Artemisia purshiana Besser var. latifolia Besser
             Artemisia rhizomata A.Nelson var. pabularis A.Nelson
             Artemisia vulgaris L. subsp. ludoviciana
             Artemisia vulgaris L. var. ludoviciana (Nutt.) Kuntze
    Artemisia serrata Nutt.*+
        saw-leaf mugwort, saw-toothed sagebrush, saw-tooth wormwood, toothed sage
    Artemisia vulgaris L.*+
        common wormwood, mugwort, sage-wort
             Artemisia vulgaris L. var. vulgaris
  Genus: Aster

    Aster borealis (Torr. & A.Gray) Prov.*+
        northern bog aster, rush aster
             Aster franklinianus Rydb.
             Aster junceus auct. non Aiton
             Aster junciformis Rydb.
             Aster laxifolius Lindl. var. borealis Torr. & A.Gray
             Aster laxifolius Nees var. laetiflorus Torr. & A.Gray
             Symphyotrichum boreale (Torr. & A.Gray) A.Löve & D.Löve
    Aster borealis (Torr. & A.Gray) Prov. X A. praealtus Poir.+
             Aster junciformis Rydb. X A. praealtus Poir.
    Aster ciliolatus Lindl.*+
        Lindley's aster, northern heart-leaved aster
             Aster ciliolatus Lindl. var. ciliolatus
             Aster lindleyanus Torr. & A.Gray
             Aster saundersii E.S.Burgess
             Symphyotrichum ciliolatum (Lindl.) A.Löve & D.Löve
    Aster cordifolius L.*+
        common blue heart-leaved aster, common blue wood aster
             Aster cordifolius L. subsp. cordifolius
             Aster cordifolius L. var. cordifolius
             Aster cordifolius L. var. moratus (Shinners) Shinners
             Aster finkii Rydb. var. moratus Shinners
             Symphyotrichum cordifolium (L.) G.L.Nesom
    Aster cordifolius L. X A. drummondii Lindl.+
    Aster drummondii Lindl.+
        Drummond's aster, hairy heart-leaved aster
             Aster drummondii Lindl. subsp. drummondii
             Aster drummondii Lindl. var. drummondii
             Aster drummondii Lindl. var. rhodactis Benke
             Aster sagittifolius Wedem. ex Willd. var. drummondii (Lindl.) Shinners
             Symphyotrichum drummondii (Lindl.) G.L.Nesom
             Symphyotrichum drummondii (Lindl.) G.L.Nesom var. drummondii
    Aster ericoides L.*+
        heath aster, squarrose white aster, white prairie aster
    Aster ericoides L. var. ericoides *+
        heath aster, squarrose white aster, white prairie aster
             Aster ericoides L. f. caeruleus (Benke) S.F.Blake
             Aster ericoides L. f. ericoides
             Aster ericoides L. f. gramsii Benke
             Aster ericoides L. subsp. ericoides
             Aster multiflorus Aiton
             Aster multiflorus Aiton var. caeruleus Benke
             Aster multiflorus Aiton var. exiguus Fernald
             Aster polycephalus Rydb.
             Aster scoparius DC.
             Lasallea ericoides (L.) Semple & Brouillet
             Symphyotrichum ericoides (L.) G.L.Nesom
             Symphyotrichum ericoides (L.) G.L.Nesom var. ericoides
             Virgulus ericoides (L.) Reveal & Keener
    Aster ericoides L. var. prostratus (Kuntze) S.F.Blake+
        prostrate heath aster
             Aster ericoides L. f. prostratus (Kuntze) Fernald
             Aster exiguus Rydb.
             Aster multiflorus Aiton var. prostratus Kuntze
             Symphyotrichum ericoides (L.) G.L.Nesom var. prostratum (Kuntze) G.L.Nesom
    Aster ericoides L. X A. sericeus Vent.*+
    Aster firmus Nees*+
        shining aster, shiny-leaved aster
             Aster lucidulus (A.Gray) Wiegand
             Aster lucidulus (A.Gray) Wiegand f. albiflorus (R.Hoffm.) Benke
             Aster lucidulus (A.Gray) Wiegand f. firmus (Nees) Deam
             Aster puniceus L. subsp. firmus
             Aster puniceus L. var. firmus (Nees) Torr. & A.Gray
             Aster puniceus L. f. lucidulus (A.Gray) Fernald var. firmus (Nees) Torr. & A.Gray
             Aster puniceus L. var. lucidulus A.Gray
             Symphyotrichum firmum (Nees) G.L.Nesom
    Aster hesperius A.Gray+
        Western lined aster
             Aster hesperius A.Gray var. laetevirens (Greene) Cronquist
             Aster hesperius A.Gray var. wootonii Greene
             Aster laetevirens Greene
             Aster lanceolatus Willd. subsp. hesperius
             Aster osterhoutii Rydb.
             Aster wootonii (Greene) Greene
             Symphyotrichum hesperium (A.Gray) A.Löve & D.Löve
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom subsp. hesperium
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. hesperium subsp. hesperium
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. hesperium (A.Gray) G.L.Nesom
    Aster hesperius A.Gray var. X A. lanceolatus Willd. var. simplex (Willd.) A.G.Jones+
             Aster hesperius A.Gray X A. simplex Willd.
    Aster laevis L. var. laevis *+
        smooth aster, smooth blue aster
             Aster laevis L. f. amplifolius (Porter) Fernald
             Aster laevis L. f. latifolius (Porter) Shinners
             Aster laevis L. f. purpurascens (Farw.) Shinners
             Aster laevis L. var. amplifolius Porter
             Aster laevis L. var. falcatus Farw.
             Aster laevis L. f. purpurascens Farw. var. falcatus Farw.
             Aster laevis L. var. latifolius Porter
             Aster laevis L. var. thyrsoideus Farw.
             Symphyotrichum laeve (L.) A.Löve & D.Löve
             Symphyotrichum laeve (L.) A.Löve & D.Löve var. laeve
    Aster laevis L. X A. lanceolatus Willd.+
             Aster laevis L. X A. paniculatus Lam.
    Aster laevis L. X A. pilosus Willd.+
    Aster laevis L. X A. puniceus L.+
    Aster lanceolatus Willd. var. interior (Wiegand) A.G.Jones+
        inland panicled aster, panicled aster, white panicle aster
             Aster interior Wiegand
             Aster lanceolatus Willd. subsp. interior
             Aster lanceolatus Willd. var. interior (Wiegand) Semple & Chmiel. subsp. lanceolatus
             Aster simplex Willd. var. interior (Wiegand) Cronquist
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. interior (Wiegand) G.L.Nesom subsp. lanceolatum
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. interior (Wiegand) G.L.Nesom
    Aster lanceolatus Willd. var. interior (Wiegand) A.G.Jones X A. lanceolatus Willd. var. simplex (Willd.) A.G.Jones+
             Aster lanceolatus Willd. var. interior (Wiegand) Semple & Chmiel. X A. tradescantii L.
             Aster simplex Willd. X A. tradescantii L.
    Aster lanceolatus Willd. var. lanceolatus +
        eastern lined aster, marsh aster, panicled aster, white panicle aster
             Aster bellidiflorus Willd.
             Aster lamarckianus Nees
             Aster lanceolatus Willd. subsp. lanceolatus
             Aster lanceolatus Willd. var. lanceolatus subsp. lanceolatus
             Aster laxus Willd.
             Aster paniculatus Lam.
             Aster paniculatus Lam. var. bellidiflorus (Willd.) E.S.Burgess
             Aster simplex Willd. var. estuarinus B.Boivin
             Aster simplex Willd. var. ramosissimus (Torr. & A.Gray) Cronquist
             Aster tenuifolius sensu Torr. & A.Gray var. ramosissimus Torr. & A.Gray
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom subsp. lanceolatum
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. lanceolatum subsp. lanceolatum
    Aster lanceolatus Willd. var. simplex (Willd.) A.G.Jones+
        branched panicled aster, panicled aster, white panicle aster
             Aster lanceolatus Willd. subsp. simplex
             Aster paniculatus Lam. var. simplex (Willd.) E.S.Burgess
             Aster simplex Willd.
             Symphyotrichum simplex (Willd.) A.Löve & D.Löve
    Aster lateriflorus (L.) Britton*+
        calico aster, goblet aster, side-flowering aster
             Aster lateriflorus (L.) Britton var. glomerellus (Torr. & A.Gray) E.S.Burgess
             Aster miser L. var. glomerellus Torr. & A.Gray
    Aster lateriflorus (L.) Britton var. hirsuticaulis (Lindl. ex DC.) Porter+
        calico aster, goblet aster, side-flowering aster
             Aster acadiensis Shinners
             Aster hirsuticaulis Lindl. ex DC.
             Aster lateriflorus (L.) Britton var. tenuipes Wiegand
             Aster tradescantii L.
             Aster tradescantii L. var. saxatilis (Fernald) House
             Aster vimineus Lam. var. saxatilis Fernald
             Symphyotrichum lateriflorum (L.) A.Löve & D.Löve var. hirsuticaule (Lindl. ex DC.) G.L.Nesom
             Symphyotrichum lateriflorum (L.) A.Löve & D.Löve var. tenuipes (Wiegand) G.L.Nesom
             Symphyotrichum tradescantii (L.) G.L.Nesom
    Aster lateriflorus (L.) Britton var. lateriflorus +
        calico aster, goblet aster, side-flowering aster
             Aster vimineus Lam.
             Solidago lateriflora L.
             Symphyotrichum lateriflorum (L.) A.Löve & D.Löve
             Symphyotrichum lateriflorum (L.) A.Löve & D.Löve var. lateriflorum
    Aster linariifolius L.*+
        flax-leaved aster, stiff aster
             Aster linariifolius L. f. lateralis House
             Aster linariifolius L. f. leucactis Benke
             Aster linariifolius L. f. monocephalus House
             Aster linariifolius L. var. linariifolius
             Aster linariifolius L. var. victorinii Fernald
             Ionactis linariifolia (L.) Greene
    Aster macrophyllus L.*+
        big-leaved aster, large-leaved aster
             Aster ianthinus E.S.Burgess
             Aster macrophyllus L. f. eglandulosus Shinners
             Aster macrophyllus L. var. excelsior E.S.Burgess
             Aster macrophyllus L. var. ianthinus (E.S.Burgess) Fernald
             Aster macrophyllus L. var. macrophyllus
             Aster macrophyllus L. var. pinguifolius E.S.Burgess
             Aster macrophyllus L. var. sejunctus E.S.Burgess
             Aster macrophyllus L. var. velutinus E.S.Burgess
             Aster riciniatus E.S.Burgess
             Aster roscidus E.S.Burgess
             Aster violaris E.S.Burgess
             Eurybia macrophylla (L.) Cass.
    Aster novae-angliae L.*+
        New England aster
             Aster novae-angliae L. f. geneseensis House
             Aster novae-angliae L. f. rosarius House
             Aster novae-angliae L. f. roseus (Desf.) Britton
             Aster novae-angliae L. var. monocephalus Farw.
             Aster roseus Desf.
             Lasallea novae-angliae (L.) Semple & Brouillet
             Symphyotrichum novae-angliae (L.) G.L.Nesom
             Virgulus novae-angliae (L.) Reveal & Keener
    Aster oblongifolius Nutt.*+
        aromatic aster
             Aster kumleinii Fr. ex A.Gray
             Aster kumleinii Fr. ex A.Gray f. roseoligulatus Benke
             Aster kumleinii Fr. ex A.Gray var. oliganthemos Lunell
             Aster oblongifolius Nutt. f. roseoligulatus (Benke) Shinners
             Aster oblongifolius Nutt. var. angustatus Shinners
             Aster oblongifolius Nutt. var. oblongifolius
             Aster oblongifolius Nutt. var. orientis Shinners
             Aster oblongifolius Nutt. var. rigidulus A.Gray
             Lasallea oblongifolia (Nutt.) Semple & Brouillet
             Symphyotrichum oblongifolium (Nutt.) G.L.Nesom
             Virgulus oblongifolius (Nutt.) Reveal & Keener
    Aster ontarionis Wiegand*+
        bottomland aster, Ontario aster
             Aster diffusus Aiton var. thyrsoides A.Gray
             Aster lateriflorus (L.) Britton var. thyrsoides (A.Gray) E.Sheld.
             Aster missouriensis Britton, non Kuntze
             Aster missouriensis Britton var. thyrsoides (A.Gray) Wiegand
             Aster pantotrichus S.F.Blake
             Aster pantotrichus S.F.Blake var. thyrsoides (A.Gray) S.F.Blake
             Aster tradescantii L. var. thyrsoides (A.Gray) B.Boivin
             Symphyotrichum ontarione (Wiegand) G.L.Nesom
    Aster oolentangiensis Riddell*+
        azure aster, prairie heart-leaved aster, sky-blue aster
             Aster azureus Lindl.
             Aster azureus Lindl. f. incarnatus Farw.
             Aster oolentangiensis Riddell var. oolentangiensis
             Symphyotrichum oolentagiense (Riddell) G.L.Nesom
             Symphyotrichum oolentangiense (Riddell) G.L.Nesom var. oolentangiense
    Aster pilosus Willd.*+
        awl aster, frost aster, hairy aster, white old-field aster
    Aster pilosus Willd. var. pilosus *+
        awl aster, frost aster, hairy aster, white old-field aster
             Aster ericoides L. var. platyphyllus Torr. & A.Gray
             Aster ericoides L. var. villosus (Michx.) Torr. & A.Gray
             Aster pilosus Willd. f. pulchellus Benke
             Aster pilosus Willd. var. platyphyllus (Torr. & A.Gray) S.F.Blake
             Aster villosus Michx.
             Symphyotrichum pilosum (Willd.) G.L.Nesom
             Symphyotrichum pilosum (Willd.) G.L.Nesom var. pilosum
    Aster pilosus Willd. X A. sagittifolius Wedem. ex Willd.+
    Aster praealtus Poir. var. coerulescens (DC.) A.G.Jones+
        veiny lined aster, willow aster, willow-leaved aster
             Aster coerulescens DC.
             Aster praealtus Poir. var. texicola Wiegand
             Symphyotrichum praealtum (Poir.) G.L.Nesom var. texicola (Wiegand) G.L.Nesom
    Aster prenanthoides Muhl. ex Willd.*+
        crooked aster, crooked-stem aster, zigzag aster
             Aster prenanthoides Muhl. ex Willd. f. milwaukeensis Benke
             Symphyotrichum prenanthoides (Muhl. ex Willd.) G.L.Nesom
    Aster puniceus L.*+
        bristly aster, purple-stem aster, swamp aster
             Aster conduplicatus E.S.Burgess
             Aster forwoodii S.Watson
             Aster puniceus L. f. albiflorus (Farw.) Shinners
             Aster puniceus L. f. colbyi (Benke) Shinners
             Aster puniceus L. f. glabratus Shinners
             Aster puniceus L. var. albiflorus Farw.
             Aster puniceus L. var. calvus Shinners
             Aster puniceus L. var. colbyi Benke
             Aster puniceus L. var. compactus Fernald
             Aster puniceus L. var. demissus Lindl.
             Aster puniceus L. var. monocephalus Farw.
             Aster puniceus L. var. oligocephalus Fernald
             Aster puniceus L. var. puniceus
             Symphyotrichum puniceum (L.) A.Löve & D.Löve
             Symphyotrichum puniceum (L.) A.Löve & D.Löve var. puniceum
    Aster sagittifolius Wedem. ex Willd.*+
        arrow-leaved aster
             Aster cordifolius L. subsp. sagittifolius
             Aster cordifolius L. var. sagittifolius (Wedem. ex Willd.) A.G.Jones
             Aster hirtellus Lindl. ex DC.
             Aster sagittifolius Wedem. ex Willd. f. hirtellus (Lindl. ex DC.) Shinners
             Aster sagittifolius Wedem. ex Willd. var. glomerellus Farw.
             Aster sagittifolius Wedem. ex Willd. var. urophyllus (Lindl.) E.S.Burgess
             Aster urophyllus Lindl.
             Aster urophyllus Lindl. var. glomerellus Farw.
             Symphyotrichum urophyllum (Lindl.) G.L.Nesom
    Aster sericeus Vent.*+
        silky aster, western silvery aster
             Aster sericeus Vent. f. albiligulatus Fassett
             Lasallea sericea (Vent.) Greene
             Symphyotrichum sericeum (Vent.) G.L.Nesom
             Virgulus sericeus (Vent.) Reveal & Keener
    Aster shortii Lindl.*+
        Midwestern blue heart-leaved aster, Short's aster
             Aster camptosorus Small
             Aster shortii Lindl. f. asper Shinners
             Aster shortii Lindl. f. candidus Benke
             Aster shortii Lindl. f. gronemanni Benke
             Aster shortii Lindl. var. monroei Benke
             Symphyotrichum shortii (Lindl.) G.L.Nesom
    Aster umbellatus Mill. var. pubens A.Gray+
        hairy flat-top aster, parasol aster
             Aster pubentior Cronquist
             Aster sericocarpoides (Small) K.Schum.
             Aster umbellatus Mill. var. latifolius A.Gray
             Doellingeria pubens (A.Gray) Rydb.
             Doellingeria sericocarpoides Small
             Doellingeria umbellata (Mill.) Nees subsp. pubens
             Doellingeria umbellata (Mill.) Nees var. latifolia (A.Gray) House
             Doellingeria umbellata (Mill.) Nees var. pubens (A.Gray) Britton
    Aster umbellatus Mill. var. umbellatus +
        flat-top aster, parasol aster, tall flat-topped white aster
             Doellingeria umbellata (Mill.) Nees
             Doellingeria umbellata (Mill.) Nees var. umbellata
    Aster X amethystinus Nutt. (pro sp.) X *+
        amethyst aster
             Aster amethystinus Nutt. f. leucerythros Bemis
             Aster amethystinus Nutt. f. leucos Bemis
             Lasallea X amethystina (Nutt.) Semple & Brouillet X
             Symphyotrichum X amethystinum (Nutt.) G.L.Nesom X
             Virgulus X amethystinus (Nutt.) Reveal & Keener X
  Genus: Balsamita

    Balsamita major Desf.*+
        costmary, mint-geranium
             Balsamita major Desf. var. tanacetoides (Boiss.) Moldenke
             Chrysanthemum balsamita (L.) Baill., non L.
             Chrysanthemum balsamita L. f. tanacetoides (Boiss.) B.Boivin
             Chrysanthemum balsamita L. var. tanacetoides Boiss.
             Pyrethrum balsamita (L.) Willd. var. tanacetoides Boiss.
             Pyrethrum majus (Desf.) Tzvelev
             Tanacetum balsamita L.
  Genus: Bidens

    Bidens aristosus (Michx.) Britton*+
        midwestern tickseed-sunflower, swamp marigold
             Bidens aristosus (Michx.) Britton f. aristosus
             Bidens aristosus (Michx.) Britton var. fritcheyi Fernald
             Bidens aristosus (Michx.) Britton var. muticus (A.Gray) A.Gray ex Gatt.
             Bidens aristosus (Michx.) Britton var. retrorsus (Sherff) Wunderlin
             Bidens polylepis S.F.Blake var. retrorsus Sherff
             Coreopsis aristosa Michx.
             Coreopsis aristosa Michx. var. mutica A.Gray
    Bidens cernuus L.*+
        nodding beggar-ticks, nodding bur-marigold
             Bidens cernuus L. f. discoideus (Wimm. & Grab.) Briq. & Cavill.
             Bidens cernuus L. f. minimus (Huds.) Larss.
             Bidens cernuus L. var. dentatus (Nutt.) B.Boivin
             Bidens cernuus L. var. ellipticus Wiegand
             Bidens cernuus L. var. integrus Wiegand
             Bidens cernuus L. var. minimus (Huds.) Pursh
             Bidens cernuus L. var. oligodontus Fernald & H.St.John
             Bidens cernuus L. var. radiatus DC.
             Bidens glaucescens Greene
             Bidens minimus Huds.
    Bidens comosus (A.Gray) Wiegand*+
        straw-stem beggar-ticks, swamp marigold, swamp tickseed
             Bidens acutus (Wiegand) Britton
             Bidens comosus (A.Gray) Wiegand var. acutus Wiegand
             Bidens tripartitus L., sensu Kartesz (1994)
    Bidens connatus Muhl. ex Willd.*+
        purple-stem beggar-ticks, purple-stemmed tickseed
             Bidens connatus Muhl. ex Willd. var. ambiversus Fassett
             Bidens connatus Muhl. ex Willd. var. anomalus Farw.
             Bidens connatus Muhl. ex Willd. var. connatus
             Bidens connatus Muhl. ex Willd. var. fallax (Warnst.) Sherff
             Bidens connatus Muhl. ex Willd. var. gracilipes Fernald
             Bidens connatus Muhl. ex Willd. var. inundatus Fernald
             Bidens connatus Muhl. ex Willd. var. petiolatus (Nutt.) Farw.
             Bidens connatus Muhl. ex Willd. var. pinnatus S.Watson
             Bidens connatus Muhl. ex Willd. var. submuticus Fassett
             Bidens connatus Muhl. ex Willd. var. typicus Fassett
             Bidens petiolatus Nutt.
             Bidens tripartitius L. var. fallax Warnst.
    Bidens coronatus (L.) Britton*+
        northern tickseed-sunflower, tall swamp marigold
             Bidens coronatus (L.) Britton var. brachyodontus Fernald
             Bidens coronatus (L.) Britton var. tenuilobus (A.Gray) Sherff
             Bidens coronatus (L.) Britton var. trichospermus (Michx.) Fernald
             Bidens trichospermus (Michx.) Britton
             Coreopsis trichosperma Michx.
             Coreopsis trichosperma Michx. var. tenuiloba A.Gray
    Bidens frondosus L.*+
        common beggar-ticks, devil's beggar-ticks
             Bidens comosus (A.Gray) Wiegand X B. frondosus L.
             Bidens frondosus L. f. anomalus (Porter ex Fernald) Fernald
             Bidens frondosus L. var. anomalus Porter ex Fernald
             Bidens frondosus L. var. caudatus Sherff
             Bidens frondosus L. var. frondosus
             Bidens frondosus L. var. pallidus Wiegand
             Bidens frondosus L. var. puberulus Wiegand
             Bidens frondosus L. var. stenodontus Fernald & H.St.John
    Bidens vulgatus Greene*+
        big devil's beggar-ticks, tall beggar-ticks
             Bidens puberulus Wiegand
             Bidens vulgatus Greene f. puberulus (Wiegand) Fernald
             Bidens vulgatus Greene var. puberulus (Wiegand) Greene
             Bidens vulgatus Greene var. schizanthus Lunell
             Bidens vulgatus Greene var. vulgatus
  Genus: Boltonia

    Boltonia asteroides (L.) L'Hér. var. recognita (Fernald & Griscom) Cronquist*+
        false aster, white doll's-daisy
             Boltonia latisquama A.Gray var. microcephala Fernald & Griscom
             Boltonia latisquama A.Gray var. occidentalis A.Gray
             Boltonia latisquama A.Gray var. recognita Fernald & Griscom
             Boltonia recognita (Fernald & Griscom) G.N.Jones
  Genus: Callistephus

    Callistephus chinensis (L.) Nees*+
        annual aster, china aster
             Aster chinensis L.
  Genus: Carduus

    Carduus acanthoides L.*+
        plumeless thistle, spiny plumeless thistle
    Carduus nutans L.*+
        musk thistle, nodding plumeless thistle, nodding thistle
             Carduus nutans L. subsp. leiophyllus
             Carduus nutans L. var. leiophyllus (Petrovic) Arčnes
    Carduus X orthocephalus Wallr. X +
        plumeless thistle
             Carduus acanthoides L. X C. nutans L.
  Genus: Centaurea

    Centaurea biebersteinii DC.*+
        spotted knapweed
             Acosta maculosa auct. non Holub
             Centaurea maculosa auct. non Lam.
    Centaurea cyanus L.*+
        bachelor's-button, bluebottle, cornflower
             Leucacantha cyanus (L.) Nieuwl. & Lunell
    Centaurea montana L.*+
        mountain-bluet, mountain cornflower
    Centaurea nigrescens Willd.+
        Tyrol knapweed, Vochin knapweed
             Centaurea dubia Suter subsp. vochinensis
             Centaurea vochinensis Bernh. ex Rchb.
  Genus: Chrysanthemum

    Chrysanthemum coronarium L.
        crown daisy
  Genus: Cichorium

    Cichorium intybus L.*+
        blue-sailors, chicory
             Cichorium intybus L. f. albiflorum Neuman
             Cichorium intybus L. f. roseum Neuman
  Genus: Cirsium

    Cirsium altissimum (L.) Spreng.*+
        tall thistle, wood thistle
             Carduus altissimus L.
             Cirsium altissimum (L.) Spreng. var. biltmoreanum Petr.
             Cirsium iowense (Pammel) Fernald
             Cirsium X iowense (Pammel) Fernald (pro sp.) X
             Cnicus iowensis Pammel
    Cirsium arvense (L.) Scop.*+
        Canada thistle, creeping thistle, field thistle
             Carduus arvensis (L.) Robson
             Cirsium arvense (L.) Scop. f. albiflorum (E.L.Rand & Redfield) Ralph Hoffm.
             Cirsium arvense (L.) Scop. var. argenteum (Vest) Fiori
             Cirsium arvense (L.) Scop. var. horridum Wimm. & Grab.
             Cirsium arvense (L.) Scop. var. integrifolium Wimm. & Grab.
             Cirsium arvense (L.) Scop. var. mite Wimm. & Grab.
             Cirsium arvense (L.) Scop. var. vestitum Wimm. & Grab.
             Cirsium incanum (Gmel.) Fisch.
             Cirsium setosum (Willd.) Besser ex M.Bieb.
             Cnicus arvensis (L.) Roth
             Cnicus arvensis (L.) Roth f. albiflorum E.L.Rand & Redfield
             Serratula arvensis L.
    Cirsium discolor (Muhl. ex Willd.) Spreng.*+
        field thistle, pasture thistle, prairie thistle
             Carduus discolor (Muhl. ex Willd.) Nutt.
             Cirsium discolor (Muhl. ex Willd.) Spreng. f. albiflorum (Britton) House
    Cirsium discolor (Muhl. ex Willd.) Spreng. X C. muticum Michx.+
             Cirsium muticum Michx. X C. discolor (Muhl. ex Willd.) Spreng.
    Cirsium flodmanii (Rydb.) Arthur*+
        Flodman's thistle, prairie thistle
             Carduus oblanceolatus Rydb.
             Cirsium nebraskense (Britton) Lunell var. discissum Lunell
             Cirsium oblanceolatum (Rydb.) K.Schum.
    Cirsium hillii (Canby) Fernald*+
        Hill's thistle, hollow-rooted thistle, prairie thistle
             Cirsium pumilum (Nutt.) Spreng. subsp. hillii
             Cirsium pumilum (Nutt.) Spreng. var. hillii (Canby) B.Boivin
             Cnicus hillii Canby
    Cirsium muticum Michx.*+
        swamp thistle
             Carduus muticus (Michx.) Pers.
             Cirsium bigelovii DC.
             Cirsium muticum Michx. f. lactiflorum Fernald
             Cirsium muticum Michx. var. monticola Fernald
             Cirsium muticum Michx. var. subpinnatifidum (Britton) Fernald
    Cirsium undulatum (Nutt.) Spreng.*+
        wavy-leaved thistle
             Carduus helleri Small
             Carduus megacephalus (A.Gray) Nutt.
             Carduus undulatus Nutt.
             Cirsium helleri (Small) Cory
             Cirsium megacephalum (A.Gray) Cockerell
             Cirsium ochrocentrum A.Gray var. helleri (Small) Petr.
             Cirsium undulatum (Nutt.) Spreng. var. megacephalum (A.Gray) Fernald
             Cirsium undulatum (Nutt.) Spreng. var. undulatum
             Cnicus undulatus (Nutt.) A.Gray
             Cnicus undulatus (Nutt.) A.Gray var. megacephalus A.Gray
    Cirsium vulgare (Savi) Ten.*+
        bull thistle
             Carduus lanceolatus L.
             Carduus vulgaris Savi
             Cirsium lanceolatum (L.) Scop., non Hill
             Cirsium lanceolatum (L.) Scop. var. hypoleucum DC.
  Genus: Cnicus

    Cnicus benedictus L.+
        blessed thistle
  Genus: Conyza

    Conyza canadensis (L.) Cronquist var. canadensis *+
        Canadian horseweed, fleabane, hogweed
             Erigeron canadensis L.
             Erigeron canadensis L. f. coloratus Fassett
             Leptilon canadense (L.) Britton
  Genus: Coreopsis

    Coreopsis lanceolata L.*+
        lance-leaf tickseed, long-stalk tickseed, sand coreopsis, sand tickseed
             Coreopsis crassifolia Aiton
             Coreopsis heterogyna Fernald
    Coreopsis lanceolata L. var. villosa Michx.+
        lance-leaf tickseed, long-stalk tickseed, sand coreopsis, sand tickseed
    Coreopsis palmata Nutt.*+
        finger tickseed, prairie coreopsis, prairie tickseed, stiff tickseed
    Coreopsis tinctoria Nutt. var. tinctoria *+
        golden tickseed, plains tickseed
             Coreopsis cardaminefolia (DC.) Torr. & A.Gray
             Coreopsis stenophylla F.E.Boynton
             Coreopsis tinctoria Nutt. var. imminuta Sherff
    Coreopsis tripteris L.*
        tall coreopsis, tall tickseed
  Genus: Cosmos

    Cosmos bipinnatus Cav.*+
        common garden cosmos
  Genus: Crepis

    Crepis capillaris (L.) Wallr.+
        hawk's-beard, smooth hawk's-beard
    Crepis tectorum L.*+
        hawk's-beard, narrow-leaved hawk's-beard
  Genus: Dyssodia

    Dyssodia papposa (Vent.) Hitchc.*+
        fetid-marigold, stinking-marigold
             Boebera papposa (Vent.) Rydb.
             Tagetes papposa Vent.
  Genus: Echinacea

    Echinacea pallida (Nutt.) Nutt.*+
        pale purple coneflower, prairie coneflower
             Brauneria pallida (Nutt.) Britton
             Echinacea pallida (Nutt.) Nutt. var. pallida
             Rudbeckia pallida Nutt.
    Echinacea purpurea (L.) Moench*+
        broad-leaved purple coneflower, eastern purple coneflower
             Brauneria purpurea (L.) Britton
             Echinacea purpurea (L.) Moench var. arkansana Steyerm.
             Rudbeckia purpurea L.
  Genus: Erechtites

    Erechtites hieracifolia (L.) Raf. ex DC. var. hieracifolia *+
        American burn-weed, fireweed
             Erechtites hieracifolia (L.) Raf. ex DC. var. intermedia Fernald
             Erechtites hieracifolia (L.) Raf. ex DC. var. praealta (Raf.) Fernald
             Erechtites hieracifolia (L.) Raf. ex DC. var. typica Fernald
             Senecio hieracifolius L.
  Genus: Erigeron

    Erigeron annuus (L.) Pers.*+
        annual fleabane, eastern daisy fleabane
             Erigeron annuus (L.) Pers. f. discoideus Vict. & J.Rousseau
             Erigeron annuus (L.) Pers. var. discoideus (Vict. & J.Rousseau) Cronquist
    Erigeron philadelphicus L.*+
        common fleabane, marsh fleabane, Philadelphia daisy
    Erigeron pulchellus Michx. var. pulchellus *+
        Robin's-plantain
             Erigeron bellidifolius Muhl. ex Willd.
             Erigeron pulchellus Michx. var. typicus Cronquist
    Erigeron strigosus Muhl. ex Willd.*+
        daisy fleabane, prairie fleabane, rough fleabane
    Erigeron strigosus Muhl. ex Willd. var. septentrionalis (Fernald & Wiegand) Fernald+
        daisy fleabane, prairie fleabane
             Erigeron ramosus (Walter) Britton, Sterns & Poggenb. var. septentrionalis Fernald & Wiegand
             Erigeron strigosus Muhl. ex Willd. subsp. septentrionalis
             Stenactis annua (L.) Nees subsp. septentrionalis
             Stenactis septentrionalis (Fernald & Wiegand) Holub
    Erigeron strigosus Muhl. ex Willd. var. strigosus +
        daisy fleabane, prairie fleabane, rough fleabane
             Doronicum ramosum Walter
             Erigeron annuus (L.) Pers. subsp. strigosus
             Erigeron ramosus (Walter) Britton, Sterns & Poggenb.
             Erigeron strigosus Muhl. ex Willd. f. discoideus (Robbins ex A.Gray) Fernald
             Erigeron strigosus Muhl. ex Willd. var. beyrichii (Fisch. & C.A.Mey.) Torr & A.Gray
             Erigeron strigosus Muhl. ex Willd. var. discoideus Robbins ex A.Gray
             Erigeron strigosus Muhl. ex Willd. var. eligulatus Cronquist
             Erigeron strigosus Muhl. ex Willd. var. typicus Cronquist
             Erigeron traversii Shinners
             Stenactis annua (L.) Nees subsp. strigosa
             Stenactis beyrichii Fisch. & C.A.Mey.
             Stenactis strigosa (Muhl. ex Willd.) DC.
  Genus: Eupatorium

    Eupatorium altissimum L.*+
        upland boneset, tall boneset, tall eupatorium, tall thoroughwort
             Eupatorium saltuense Fernald
    Eupatorium maculatum L.*+
        spotted Joe-Pye-weed
    Eupatorium maculatum L. var. maculatum subsp. maculatum+
        spotted Joe-Pye-weed
             Eupatorium maculatum L. var. maculatum
             Eupatoriadelphus maculatus (L.) R.M.King & H.Rob.
    Eupatorium perfoliatum L. var. perfoliatum *+
        boneset, common boneset, thoroughwort
             Eupatorium perfoliatum L. f. perfoliatum
             Eupatorium perfoliatum L. f. purpureum Britton
             Eupatorium perfoliatum L. f. trifolium Fassett
             Eupatorium perfoliatum L. f. truncatum (Muhl. ex Willd.) Fassett
    Eupatorium purpureum L.*+
        green-stemmed Joe-Pye-weed, purple Joe-Pye-weed
             Eupatorium falcatum Michx.
             Eupatorium holzingeri Rydb.
             Eupatoriadelphus purpureus (L.) R.M.King & H.Rob.
             Eupatorium purpureum L. var. holzingeri (Rydb.) E.Lamont
             Eupatorium purpureum L. var. purpureum
    Eupatorium rugosum Houtt. var. rugosum *+
        white snakeroot
             Ageratina altissima (L.) R.M.King & H.Rob.
             Ageratum altissimum L., non Eupatorium altissimum L.
             Ageratina altissima (L.) R.M.King & H.Rob. var. altissima
             Eupatorium rugosum Houtt. var. chlorolepis Fernald
             Eupatorium rugosum Houtt. var. tomentellum (B.L.Rob.) S.F.Blake
             Eupatorium rugosum Houtt. var. villicaule (Fernald) S.F.Blake
             Eupatorium urticaefolium Reichard
             Eupatorium urticaefolium Reichard var. tomentellum B.L.Rob.
    Eupatorium serotinum Michx.*+
        late boneset, late eupatorium, late-flowering thoroughwort
    Eupatorium sessilifolium L. var. brittonianum Porter*+
        upland boneset, woodland boneset
  Genus: Euthamia

    Euthamia graminifolia (L.) Nutt. var. graminifolia *+
        common flat-topped goldenrod, grass-leaved goldenrod
             Chrysocoma graminifolia L.
             Euthamia floribunda Greene
             Euthamia graminifolia (L.) Nutt. var. nuttallii (Greene) W.Stone
             Euthamia nuttallii Greene
             Solidago graminifolia (L.) Salisb.
             Solidago graminifolia (L.) Salisb. var. graminifolia
             Solidago graminifolia (L.) Salisb. var. nuttallii (Greene) Fernald
             Solidago graminifolia (L.) Salisb. var. polycephala (Fernald) Fernald
             Solidago graminifolia (L.) Salisb. var. typica Rosend. & Cronquist
             Solidago hirtella (Greene) Bush
             Solidago nuttallii (Greene) Bush
             Solidago polycephala Fernald
    Euthamia gymnospermoides Greene*+
        Great Plains flat-topped goldenrod, Texas goldentop, viscid grass-leaved goldenrod
             Euthamia camporum Greene
             Euthamia chrysothamnoides Greene
             Euthamia glutinosa Rydb.
             Euthamia media Greene
             Euthamia pulverulenta Greene
             Solidago camporum (Greene) A.Nelson
             Solidago chrysothamnoides (Greene) Bush
             Solidago graminifolia (L.) Salisb. var. gymnospermoides (Greene) Croat
             Solidago graminifolia (L.) Salisb. var. media (Greene) S.K.Harris
             Solidago gymnospermoides (Greene) Fernald
             Solidago gymnospermoides (Greene) Fernald var. callosa S.K.Harris
             Solidago media (Greene) Bush
             Solidago moseleyi Fernald
             Solidago perglabra Friesner
             Solidago texensis Friesner
    Euthamia tenuifolia (Pursh) Nutt. var. tenuifolia +
        Coastal Plain flat-topped goldenrod, slender goldentop
             Euthamia caroliniana (L.) Greene ex Porter & Britton
             Euthamia microphylla Greene
             Euthamia remota Greene
             Solidago caroliniana Britton, Sterns & Poggenb.
             Solidago microphylla (Greene) Bush
             Solidago remota (Greene) Friesner
             Solidago tenuifolia Pursh
  Genus: Gaillardia

    Gaillardia aristata Pursh*+
        common blanket-flower, common gaillardia
  Genus: Galinsoga

    Galinsoga parviflora Cav.+
        gallant-soldier, lesser quick-weed, smooth Peruvian-daisy
             Galinsoga parviflora Cav. var. semicalva A.Gray
             Galinsoga semicalva (A.Gray) H.St.John & D.White
             Galinsoga semicalva (A.Gray) H.St.John & D.White var. percalva S.F.Blake
    Galinsoga quadriradiata Ruiz & Pav.*+
        common quick-weed, Peruvian-daisy, quick-weed, shaggy-soldier
             Ageratum perplexans M.F.Johnson
             Galinsoga aristulata E.P.Bicknell
             Galinsoga bicolorata H.St.John & D.White
             Galinsoga caracasana (DC.) Sch.Bip.
             Galinsoga ciliata (Raf.) S.F.Blake
             Galinsoga parviflora Cav. var. hispida DC.
  Genus: Gnaphalium

    Gnaphalium obtusifolium L. var. obtusifolium *+
        cat's-foot, fragrant cudweed, old-field-balsam, old-field cudweed, rabbit-tobacco
             Pseudognaphalium obtusifolium (L.) Hilliard & B.L.Burtt
             Pseudognaphalium obtusifolium (L.) Hilliard & B.L.Burtt subsp. obtusifolium
    Gnaphalium uliginosum L.*+
        low cudweed, marsh cudweed
             Filaginella uliginosa (L.) Opiz
  Genus: Grindelia

    Grindelia lanceolata Nutt. var. lanceolata *
        narrow-leaved gum-weed, spiny-tooth gum-weed
    Grindelia squarrosa (Pursh) Dunal*+
        curly-cup gum-weed, gum-plant, gum-weed
    Grindelia squarrosa (Pursh) Dunal var. squarrosa +
        curly-cup gum-weed, gum-plant, gum-weed
  Genus: Hasteola

    Hasteola suaveolens (L.) Pojark.*+
        hastate Indian-plantain, sweet Indian-plantain
             Cacalia suaveolens L.
             Synosma suaveolens (L.) Raf. ex Britton
  Genus: Helenium

    Helenium amarum (Raf.) H.Rock var. amarum *+
        bitter-weed, narrow-leaved sneezeweed, yellow-dicks
             Gaillardia amara Raf.
             Helenium tenuifolium Nutt.
    Helenium autumnale L. var. autumnale *+
        common sneezeweed
             Helenium altissimum Link
             Helenium autumnale L. var. canaliculatum (Lam.) Torr. & A.Gray
             Helenium canaliculatum Lam.
             Helenium latifolium Mill.
  Genus: Helianthus

    Helianthus annuus L.*+
        common sunflower, garden sunflower
             Helianthus annuus L. subsp. jaegeri
             Helianthus annuus L. subsp. lenticularis
             Helianthus annuus L. subsp. texanus
             Helianthus annuus L. var. annuus
             Helianthus annuus L. var. lenticularis (Douglas ex Lindl.) Steyerm.
             Helianthus annuus L. var. macrocarpus (DC.) Cockerell
             Helianthus annuus L. var. texanus (Heiser) Shinners
             Helianthus aridus Rydb.
             Helianthus lenticularis Douglas ex Lindl.
    Helianthus decapetalus L.+
        forest sunflower, pale sunflower, thin-leaved sunflower
             Helianthus scrophulariifolius Britton
             Helianthus tracheliifolius Mill.
    Helianthus divaricatus L.*+
        divaricate sunflower, woodland sunflower
             Helianthus divaricatus L. var. angustifolius Kuntze
    Helianthus giganteus L.*+
        giant sunflower, swamp sunflower, tall sunflower
             Helianthus alienus E.Watson
             Helianthus borealis E.Watson
             Helianthus exasperatus E.Watson
             Helianthus giganteus L. subsp. alienus
             Helianthus giganteus L. var. subtuberosus Britton
             Helianthus membranaceus E.Watson
             Helianthus nuttallii Torr. & A.Gray var. subtuberosus (Britton) B.Boivin
             Helianthus subtuberosus (Britton) Britton
             Helianthus validus E.Watson
    Helianthus grosseserratus M.Martens*+
        saw-tooth sunflower
             Helianthus grosseserratus M.Martens f. plenifolius Wadmond
             Helianthus grosseserratus M.Martens subsp. maximus
             Helianthus grosseserratus M.Martens var. hypoleucus A.Gray
             Helianthus instabilis E.Watson
    Helianthus hirsutus Raf.+
        hairy sunflower, oblong sunflower, rough sunflower
             Helianthus hirsutus Raf. var. stenophyllus Torr. & A.Gray
             Helianthus hirsutus Raf. var. trachyphyllus Torr. & A.Gray
             Helianthus stenophyllus (Torr. & A.Gray) E.Watson
    Helianthus maximilianii Schrad.*+
        Maximilian's sunflower
             Helianthus dalyi Britton
    Helianthus occidentalis Riddell subsp. occidentalis*+
        few-leaved sunflower, naked-stemmed sunflower, western sunflower
             Helianthus dowellianus M.A.Curtis
             Helianthus occidentalis Riddell var. dowellianus (M.A.Curtis) Torr. & A.Gray
             Helianthus occidentalis Riddell var. occidentalis
    Helianthus pauciflorus Nutt.*+
        few-leaved sunflower, stiff sunflower
    Helianthus pauciflorus Nutt. subsp. pauciflorus+
        few-leaved sunflower, prairie sunflower, stiff sunflower
             Helianthus laetiflorus Pers. var. rigidus (Cass.) Fernald
             Helianthus pauciflorus Nutt. var. pauciflorus
             Helianthus rigidus (Cass.) Desf.
             Helianthus rigidus (Cass.) Desf. f. flavus Deam
             Helianthus rigidus (Cass.) Desf. subsp. rigidus
             Helianthus rigidus (Cass.) Desf. var. rigidus
    Helianthus pauciflorus Nutt. subsp. subrhomboideus+
        few-leaved sunflower, stiff sunflower
             Helianthus laetiflorus Pers. var. subrhomboideus (Rydb.) Fernald
             Helianthus rigidus (Cass.) Desf. subsp. laetiflorus
             Helianthus rigidus (Cass.) Desf. subsp. subrhomboideus
             Helianthus rigidus (Cass.) Desf. var. subrhomboideus (Rydb.) Cronquist
             Helianthus subrhomboideus Rydb.
    Helianthus salicifolius A.Dietr.+
        willow-leaved sunflower
             Helianthus filiformis Small
             Helianthus orgyalis DC.
    Helianthus strumosus L.*+
        pale-leaved woodland sunflower, rough-leaved sunflower
             Helianthus montanus E.Watson
             Helianthus saxicola Small
    Helianthus tuberosus L.*+
        Jerusalem-artichoke, woodland sunflower
             Helianthus subcanescens (A.Gray) E.Watson
             Helianthus tomentosus Michx.
             Helianthus tuberosus L. var. subcanescens A.Gray
    Helianthus X kellermani Britton (pro sp.) X +
        Kellerman's sunflower
  Genus: Heliopsis

    Heliopsis helianthoides (L.) Sweet*+
        false sunflower, ox-eye, sunflower-everlasting
    Heliopsis helianthoides (L.) Sweet var. helianthoides +
        false sunflower, ox-eye, smooth ox-eye, sunflower-everlasting
             Buphthalmum helianthoides L.
             Heliopsis helianthoides (L.) Sweet subsp. helianthoides
    Heliopsis helianthoides (L.) Sweet var. scabra (Dunal) Fernald+
        false sunflower, ox-eye, sunflower-everlasting
             Heliopsis helianthoides (L.) Sweet subsp. occidentalis
             Heliopsis helianthoides (L.) Sweet subsp. scabra
             Heliopsis helianthoides (L.) Sweet var. occidentalis (T.R.Fisher) Steyerm.
             Heliopsis minor (Hook.) C.Mohr
             Heliopsis scabra Dunal
  Genus: Hieracium

    Hieracium aurantiacum L.*+
        devil's-paintbrush, grim-the-collier, orange hawkweed, red daisy
    Hieracium caespitosum Dumort.+
        field hawkweed, meadow hawkweed, yellow king-devil
             Hieracium pratense Tausch
    Hieracium kalmii L.*+
        Canada hawkweed, Kalm's hawkweed
             Hieracium canadense Michx.
             Hieracium canadense Michx. var. canadense
             Hieracium canadense Michx. var. fasciculatum (Pursh) Fernald
             Hieracium columbianum Rydb.
             Hieracium kalmii L. var. fasciculatum (Pursh) Lepage
             Hieracium kalmii L. var. kalmii
             Hieracium kalmii L. var. subintegrum (Lepage) Lepage
             Hieracium scabriusculum Schwein. var. columbianum (Rydb.) Lepage
             Hieracium umbellatum L. var. canadense (Michx.) Breitung
             Hieracium umbellatum L. var. scabriusculum Farw.
    Hieracium longipilum Torr. ex Hook.*+
        hairy hawkweed, long-beard hawkweed, long-haired hawkweed, prairie hawkweed
    Hieracium piloselloides Vill.*+
        glaucous king-devil, tall hawkweed
             Hieracium florentinum All.
    Hieracium scabrum Michx.*+
        rough hawkweed, sticky hawkweed
             Hieracium scabrum Michx. var. scabrum
             Hieracium scabrum Michx. var. tonsum Fernald & H.St.John
    Hieracium umbellatum L.+
        narrow-leaved hawkweed, northern hawkweed
             Hieracium mineapolitanum Gand.
             Hieracium scabriusculum Schwein.
             Hieracium scabriusculum Schwein. var. perhirsutum Lepage
             Hieracium scabriusculum Schwein. var. saximontanum Lepage
             Hieracium scabriusculum Schwein. var. scabriusculum
             Hieracium scabriusculum Schwein. var. scabrum (Schwein.) Lepage
             Hieracium scabriusculum Schwein. f. xanthostylum Lepage var. scabrum (Schwein.) Lepage
    Hieracium X fassettii Lepage var. fassettii X +
        Fassett's hawkweed
  Genus: Inula

    Inula helenium L.*+
        elecampane
  Genus: Iva

    Iva axillaris Pursh+
        poverty-weed
             Iva axillaris Pursh subsp. robustior
             Iva axillaris Pursh var. robustior Hook.
    Iva xanthifolia Nutt.*+
        bur-weed marsh-elder, giant sump-weed
             Cyclachaena xanthifolia (Nutt.) Fresen.
  Genus: Krigia

    Krigia biflora (Walter) S.F.Blake*+
        false-dandelion, orange dwarf-dandelion
    Krigia biflora (Walter) S.F.Blake subsp. biflora+
        false-dandelion, orange dwarf-dandelion
             Adopogon virginicum (L.) Kuntze
             Cynthia virginica (L.) D.Don
             Hyoseris biflora Walter
             Krigia amplexicaulis Nutt.
             Krigia biflora (Walter) S.F.Blake var. biflora
    Krigia biflora (Walter) S.F.Blake subsp. glandulifera+
        false-dandelion, orange dwarf-dandelion
             Krigia biflora (Walter) S.F.Blake f. glandulifera Fernald
    Krigia virginica (L.) Willd.*+
        Virginia dwarf-dandelion
             Hyoseris virginica L.
  Genus: Kuhnia

    Kuhnia eupatorioides L. var. corymbulosa Torr. & A.Gray*+
        false boneset
             Brickellia eupatorioides (L.) Shinners var. corymbulosa (Torr. & A.Gray) Shinners
             Kuhnia hitchcockii A.Nelson
  Genus: Lactuca

    Lactuca biennis (Moench) Fernald*+
        tall blue lettuce, woodland lettuce
             Lactuca biennis (Moench) Fernald f. aurea (Jenn.) Fernald
             Lactuca biennis (Moench) Fernald f. integrifolia (Torr. & A.Gray) Fernald
             Lactuca spicata auct. non (Lam.) Hitchc.
             Lactuca spicata (Lam.) Hitchc. var. integrifolia (Torr. & A.Gray) Britton
             Mulgedium spicatum auct. non (Lam.) Small
             Mulgedium spicatum (Lam.) Small var. integrifolium (Torr. & A.Gray) Small
             Sonchus biennis Moench
    Lactuca canadensis L.*+
        Canada lettuce, tall lettuce, tall wild lettuce, wild lettuce
             Lactuca canadensis L. var. canadensis
             Lactuca canadensis L. var. integrifolia (Bigelow) Torr. & A.Gray
             Lactuca canadensis L. var. latifolia Kuntze
             Lactuca canadensis L. f. exauriculata Wiegand var. latifolia Kuntze
             Lactuca canadensis L. var. longifolia (Michx.) Farw.
             Lactuca canadensis L. f. angustipes (Wiegand) Farw. var. longifolia (Michx.) Farw.
             Lactuca canadensis L. var. obovata Wiegand
             Lactuca canadensis L. var. spinulosa Jenn.
             Lactuca canadensis L. var. typica Wiegand
             Lactuca canadensis L. f. angustipes Wiegand var. typica Wiegand
             Lactuca sagittifolia Elliott
    Lactuca floridana (L.) Gaertn.+
        blue lettuce, woodland lettuce
             Lactuca floridana (L.) Gaertn. var. villosa (Jacq.) Cronquist
             Lactuca villosa Jacq.
             Mulgedium floridanum (L.) DC.
             Mulgedium villosum (Jacq.) Small
    Lactuca ludoviciana (Nutt.) Riddell+
        prairie lettuce, prairie wild lettuce, western wild lettuce
             Lactuca campestris Greene
             Lactuca campestris Greene var. typica Wiegand
             Sonchus ludovicianus Nutt.
    Lactuca pulchella (Pursh) DC.*+
        showy blue lettuce
             Lactuca oblongifolia Nutt.
             Lactuca tatarica (L.) C.A.Mey. subsp. pulchella
             Lactuca tatarica (L.) C.A.Mey. var. heterophylla (Nutt.) B.Boivin
             Lactuca tatarica (L.) C.A.Mey. var. pulchella (Pursh) Breitung
             Mulgedium heterophyllum Nutt.
             Sonchus pulchellus Pursh
             Sonchus tataricus L., pro parte
    Lactuca serriola L.*+
        compass-plant, prickly lettuce
             Lactuca integrata (Gren. & Godr.) A.Nelson
             Lactuca scariola L.
             Lactuca scariola L. f. integrifolia (Bogenh.) Beck
             Lactuca scariola L. var. integrata Gren. & Godr.
             Lactuca serriola L. var. integrata (Gren. & Godr.) Farw.
  Genus: Lapsana

    Lapsana communis L.*+
        common nipplewort, nipplewort
  Genus: Leucanthemella

    Leucanthemella serotina (L.) Tzvelev*+
        giant daisy
             Chrysanthemum serotinum L.
             Chrysanthemum uliginosum (Waldst.& Kit.Pers. ex Willd.) Pers.
             Leucanthemum serotinum (L.) Stankov
             Tanacetum serotinum (L.) Sch.Bip.
  Genus: Leucanthemum

    Leucanthemum vulgare Lam.*+
        common daisy, field daisy, marguerite, ox-eye daisy
             Chrysanthemum leucanthemum L.
             Chrysanthemum leucanthemum L. var. boecheri B.Boivin
             Chrysanthemum leucanthemum L. var. pinnatifidum Lecoq & Lamotte
             Leucanthemum leucanthemum (L.) Rydb.
             Leucanthemum vulgare Lam. var. pinnatifidum (Lecoq & Lamotte) Moldenke
  Genus: Liatris

    Liatris aspera Michx.*+
        lacerate blazing-star, rough blazing-star, tall gay-feather
             Lacinaria aspera (Michx.) Greene
             Liatris aspera Michx. f. benkei (J.F.Macbr.) Fernald
             Liatris aspera Michx. var. aspera
             Liatris aspera Michx. var. intermedia (Lunell) Gaiser
             Liatris aspera Michx. var. typica Gaiser
             Liatris scariosa (L.) Willd. f. benkei J.F.Macbr.
             Liatris sphaeroidea Michx. f. asperifolia Shinners
    Liatris cylindracea Michx.*+
        cylindrical blazing-star, few-headed blazing-star
             Lacinaria cylindracea (Michx.) Kuntze
             Liatris cylindracea Michx. f. bartelii Steyerm.
             Liatris cylindracea Michx. var. solitaria MacMill.
    Liatris ligulistylis (A.Nelson) K.Schum.*+
        northern plains blazing-star, showy blazing-star
             Lacinaria ligulistylis A.Nelson
    Liatris pycnostachya Michx.*+
        prairie blazing-star, thick-spike blazing-star, thick-spike gay-feather
             Lacinaria bebbiana Rydb.
             Lacinaria pycnostachya (Michx.) Kuntze
             Liatris pycnostachya Michx. f. hubrichti E.S.Anderson
    Liatris spicata (L.) Willd.*+
        dense gay-feather, marsh blazing-star, marsh gay-feather, sessile blazing-star, sessile-headed blazing-star
             Lacinaria spicata (L.) Kuntze
             Serratula spicata L.
  Genus: Matricaria

    Matricaria discoidea DC.*+
        pineapple-weed
             Artemisia matricarioides Less.
             Chamomilla suaveolens (Pursh) Rydb.
             Lepidanthus suaveolens (Pursh) Nutt.
             Lepidotheca suaveolens (Pursh) Nutt.
             Matricaria matricarioides (Less.) Porter
             Matricaria suaveolens (Pursh) Buchenau, non L.
             Santolina suaveolens Pursh
             Tanacetum suaveolens (Pursh) Hook.
    Matricaria recutita L.*+
        chamomile, mayweed
             Chamomilla chamomilla (L.) Rydb.
             Chamomilla recutita (L.) Rauschert
             Matricaria chamomilla L.
             Matricaria chamomilla L. var. coronata (J.Gay) Coss. & Germ.
             Matricaria suaveolens L.
  Genus: Megalodonta

    Megalodonta beckii (Torr. ex Spreng.) Greene*+
        water beggar-ticks, water-marigold
             Bidens beckii Torr. ex Spreng.
  Genus: Microseris

    Microseris cuspidata (Pursh) Sch.Bip.*+
        false dandelion, prairie dandelion, prairie false dandelion
             Agoseris cuspidata (Pursh) Raf.
             Nothocalais cuspidata (Pursh) Greene
             Troximon cuspidata Pursh
  Genus: Packera

    Packera aurea (L.) A.Löve & D.Löve*+
        golden ragwort, heart-leaved groundsel
             Senecio aureus L.
             Senecio aureus L. var. aquilonius Fernald
             Senecio aureus L. var. gracilis (Pursh) Hook.
             Senecio aureus L. var. intercursus Fernald
             Senecio gracilis Pursh
    Packera paupercula (Michx.) A.Löve & D.Löve*+
        balsam groundsel, balsam ragwort, northern meadow groundsel, northern ragwort
             Senecio aureus L. var. balsamitae (Muhl. ex Willd.) Torr. & A.Gray
             Senecio balsamitae Muhl. ex Willd.
             Senecio crawfordii (Britton) G.W.Douglas & G.R.Douglas
             Senecio gaspensis Greenm.
             Senecio gaspensis Greenm. var. firmifolius (Greenm.) Fernald
             Senecio pauperculus Michx.
             Senecio pauperculus Michx. var. balsamitae (Muhl. ex Willd.) Fernald
             Senecio pauperculus Michx. var. crawfordii (Britton) T.M.Barkley
             Senecio pauperculus Michx. var. firmifolius (Greenm.) Greenm.
             Senecio pauperculus Michx. var. neoscoticus Fernald
             Senecio pauperculus Michx. var. pauperculus
             Senecio pauperculus Michx. var. praelongus (Greenm.) House
             Senecio pauperculus Michx. var. thompsoniensis (Greenm.) B.Boivin
             Senecio tweedyi Rydb.
    Packera paupercula (Michx.) A.Löve & D.Löve var. paupercula
        balsam groundsel, balsam ragwort, northern meadow groundsel, northern ragwort
    Packera paupercula (Michx.) A.Löve & D.Löve var. savannarum R.R.Kowal
        balsam groundsel, balsam ragwort, northern meadow groundsel, northern ragwort
    Packera plattensis (Nutt.) W.A.Weber & A.Löve*+
        Platte groundsel, prairie groundsel, prairie ragwort
             Senecio plattensis Nutt.
             Senecio pseudotomentosus Mack. & Bush
    Packera pseudaurea (Rydb.) W.A.Weber & A.Löve var. semicordata (Mack. & Bush) D.K.Trock & T.M.Barkley+
        false-gold groundsel, heart-leaved groundsel, western golden ragwort
             Senecio aureus L. var. semicordatus (Mack. & Bush) Greenm.
             Senecio pseudaureus Rydb. subsp. semicordatus
             Senecio pseudaureus Rydb. var. semicordatus (Mack. & Bush) T.M.Barkley
             Senecio semicordatus Mack. & Bush
  Genus: Parthenium

    Parthenium integrifolium L.*+
        American feverfew, eastern feverfew, eastern parthenium, wild quinine
             Parthenium integrifolium L. var. integrifolium
  Genus: Prenanthes

    Prenanthes alba L.*+
        lion's-foot, rattlesnake-root, white-lettuce
             Nabalus albus (L.) Hook.
    Prenanthes aspera Michx.*+
        rough rattlesnake-root, rough white-lettuce
             Nabalus asperus (Michx.) Torr. & A.Gray
    Prenanthes crepidinea Michx.*+
        great white-lettuce, Midwestern white-lettuce, nodding rattlesnake-root
             Nabalus crepidineus (Michx.) DC.
    Prenanthes racemosa Michx.*+
        glaucous white-lettuce, purple rattlesnake-root
             Nabalus racemosus (Michx.) DC.
             Prenanthes racemosa Michx. subsp. multiflora
             Prenanthes racemosa Michx. var. multiflora (Cronquist) Dorn
             Prenanthes racemosa Michx. var. racemosa
  Genus: Ratibida

    Ratibida columnifera (Nutt.) Wooton & Standl.*+
        columnar coneflower, long-headed coneflower
             Lepachys columnifera (Nutt.) J.F.Macbr.
             Lepachys columnaris (Pursh) Torr. & A.Gray
             Obeliscaria pulcherrima DC.
             Ratibida columnaris (Sims) D.Don
             Ratibida columnaris (Sims) D.Don var. pulcherrima (DC.) D.Don
             Rudbeckia columnifera Nutt.
             Rudbeckia columnaris Pursh, non Sims
             Rudbeckia columnaris Sims
    Ratibida pinnata (Vent.) Barnhart*+
        globular coneflower, yellow coneflower
             Lepachys pinnata (Vent.) Torr. & A.Gray
             Rudbeckia pinnata Vent.
  Genus: Rudbeckia

    Rudbeckia hirta L. var. pulcherrima Farw.*+
        black-eyed Susan
             Rudbeckia bicolor Nutt.
             Rudbeckia hirta L. var. corymbifera Fernald
             Rudbeckia hirta L. var. lanceolata (Bisch.) Core
             Rudbeckia hirta L. var. sericea (T.V.Moore) Fernald
             Rudbeckia hirta L. var. serotina (Nutt.) Core
             Rudbeckia lanceolata Bisch.
             Rudbeckia longipes T.V.Moore
             Rudbeckia serotina Nutt.
             Rudbeckia sericea T.V.Moore
             Rudbeckia serotina Nutt. var. corymbifera (Fernald) Fernald & B.G.Schub.
             Rudbeckia serotina Nutt. var. lanceolata (Bisch.) Fernald & B.G.Schub.
             Rudbeckia serotina Nutt. var. sericea (T.V.Moore) Fernald & B.G.Schub.
    Rudbeckia laciniata L. var. laciniata +
        cut-leaved coneflower, wild golden-glow
    Rudbeckia subtomentosa Pursh*+
        sweet black-eyed Susan, sweet coneflower
    Rudbeckia triloba L. var. triloba *+
        brown-eyed Susan, three-lobed coneflower
  Genus: Senecio

    Senecio vulgaris L.*+
        common groundsel
  Genus: Silphium

    Silphium integrifolium Michx.*+
        prairie rosinweed, whole-leaf rosinweed
    Silphium integrifolium Michx. var. deamii L.M.Perry+
        Deam's rosinweed, prairie rosinweed
    Silphium integrifolium Michx. var. neglectum Settle & T.R.Fisher+
        prairie rosinweed, whole-leaf rosinweed
    Silphium integrifolium Michx. X S. perfoliatum L.+
    Silphium laciniatum L. var. laciniatum *+
        compass-plant
    Silphium perfoliatum L. var. perfoliatum *+
        cup-plant
    Silphium terebinthinaceum Jacq. var. terebinthinaceum *+
        basal-leaved rosinweed, prairie-dock, prairie rosinweed
             Silphium rumicifolium Small
  Genus: Solidago

    Solidago canadensis L.*+
        Canadian goldenrod, common goldenrod
    Solidago canadensis L. var. hargeri Fernald+
        Canadian goldenrod, Harger's goldenrod
             Solidago canadensis L. var. gilvocanescens Rydb., misapplied
    Solidago canadensis L. var. scabra Torr. & A.Gray*+
        Canadian goldenrod, common goldenrod, tall goldenrod
             Solidago altissima L.
             Solidago altissima L. var. pluricephala M.C.Johnst.
             Solidago altissima L. var. procera (Aiton) Fernald
             Solidago hirsutissima Mill.
             Solidago lunellii Rydb.
             Solidago procera Aiton
    Solidago flexicaulis L.*+
        broad-leaved goldenrod, zigzag goldenrod
             Solidago latifolia L.
    Solidago gigantea Aiton*+
        giant goldenrod, late goldenrod, smooth goldenrod
             Aster latissimifolius (Mill.) Kuntze var. serotinus Kuntze
             Solidago gigantea Aiton subsp. serotina
             Solidago gigantea Aiton var. gigantea
             Solidago gigantea Aiton var. leiophylla Fernald
             Solidago gigantea Aiton var. pitcheri (Nutt.) Shinners
             Solidago gigantea Aiton var. serotina (Kuntze) Cronquist
             Solidago gigantea Aiton var. shinnersii Beaudry
             Solidago pitcheri Nutt.
             Solidago serotina Aiton, non Retz.
             Solidago serotinoides A.Löve & D.Löve
             Solidago serotina Aiton var. gigantea (Aiton) A.Gray
             Solidago shinnersii (Beaudry) Beaudry
             Solidago X leiophallax Friesner X
    Solidago juncea Aiton*+
        early goldenrod
             Solidago arguta Aiton var. scabrella Torr. & A.Gray
             Solidago juncea Aiton f. juncea
             Solidago juncea Aiton f. scabrella (Torr. & A.Gray) Fernald
             Solidago juncea Aiton var. scabrella (Torr. & A.Gray) A.Gray
    Solidago missouriensis Nutt.*+
        Missouri goldenrod
    Solidago missouriensis Nutt. var. fasciculata Holz.+
        Missouri goldenrod
             Solidago glaberrima M.Martens
             Solidago glaberrima M.Martens var. moritura (Steele) E.J.Palmer & Steyerm.
             Solidago missouriensis Nutt. var. glaberrima (M.Martens) Rosend. & Cronquist
             Solidago moritura Steele
    Solidago nemoralis Aiton*+
        dyer's-weed goldenrod, gray goldenrod, old-field goldenrod
    Solidago nemoralis Aiton subsp. decemflora+
        field goldenrod, old-field goldenrod
             Solidago decemflora DC.
             Solidago longipetiolata Mack. & Bush
             Solidago nemoralis Aiton subsp. longipetiolata
             Solidago nemoralis Aiton var. decemflora (DC.) Fernald
             Solidago nemoralis Aiton var. longipetiolata (Mack. & Bush) E.J.Palmer & Steyerm.
             Solidago pulcherrima A.Nelson
    Solidago nemoralis Aiton subsp. nemoralis+
        dyer's-weed goldenrod, field goldenrod, gray goldenrod, old-field goldenrod
             Solidago nemoralis Aiton subsp. haleana
             Solidago nemoralis Aiton var. haleana Fernald
             Solidago nemoralis Aiton var. nemoralis
             Solidago nemoralis Aiton var. typica Rosend. & Cronquist
    Solidago patula Muhl. ex Willd. var. patula *+
        rough-leaved goldenrod, round-leaved goldenrod, swamp goldenrod
    Solidago ptarmicoides (Nees) B.Boivin*+
        prairie goldenrod, upland white goldenrod
             Aster ptarmicoides (Nees) Torr. & A.Gray
             Aster ptarmicoides (Nees) Torr. & A.Gray var. georgianus A.Gray
             Doellingeria ptarmicoides Nees
             Inula alba Nutt.
             Oligoneuron album (Nutt.) G.L.Nesom
             Unamia alba (Nutt.) Rydb.
             Unamia ptarmicoides (Nees) Greene
    Solidago riddellii Frank ex Riddell*+
        Riddell's goldenrod
             Oligoneuron riddellii (Frank ex Riddell) Rydb.
    Solidago rigida L.*+
        rigid goldenrod, stiff goldenrod
    Solidago rigida L. subsp. rigida+
        rigid goldenrod, stiff goldenrod
             Oligoneuron grandiflorum (Raf.) Small
             Oligoneuron rigidum (L.) Small
             Oligoneuron rigidum (L.) Small var. rigidum
             Solidago grandiflora Raf.
             Solidago rigida L. var. rigida
    Solidago sciaphila E.S.Steele*+
        cliff goldenrod, Driftless Area goldenrod, shadowy goldenrod
    Solidago speciosa Nutt.*+
        showy goldenrod
    Solidago speciosa Nutt. var. rigidiuscula Torr. & A.Gray+
        showy goldenrod
             Solidago rigidiuscula (Torr. & A.Gray) Porter
             Solidago speciosa Nutt. var. angustata Torr. & A.Gray
    Solidago speciosa Nutt. var. speciosa +
        showy goldenrod
             Solidago conferta Mill.
             Solidago harperi Mack.
    Solidago uliginosa Nutt.*+
        northern bog goldenrod
             Solidago chrysolepis Fernald
             Solidago humilis Pursh var. peracuta Fernald
             Solidago linoides Torr. & A.Gray
             Solidago neglecta Torr. & A.Gray
             Solidago purshii Porter
             Solidago uliginosa Nutt. var. linoides (Torr. & A.Gray) Fernald
             Solidago uliginosa Nutt. var. neglecta (Torr. & A.Gray) Fernald
             Solidago uliginosa Nutt. var. peracuta (Fernald) Friesner
             Solidago uliginosa Nutt. var. uliginosa
             Solidago uniligulata (DC.) Porter
             Solidago uniligulata (DC.) Porter var. neglecta (Torr. & A.Gray) Fernald
    Solidago ulmifolia Muhl. ex Willd. var. ulmifolia *+
        elm-leaved goldenrod
  Genus: Sonchus

    Sonchus arvensis L.*+
        field sow-thistle, perennial sow-thistle
    Sonchus arvensis L. var. glabrescens Günther, Grab. & Wimm.*+
        marsh sow-thistle
             Sonchus arvensis L. subsp. uliginosus
             Sonchus uliginosus M.Bieb.
    Sonchus asper (L.) Hill*+
        prickly sow-thistle, spiny sow-thistle
             Sonchus asper (L.) Hill f. glandulosus Beckh.
             Sonchus asper (L.) Hill f. inermis (Bisch.) Beck
             Sonchus asper (L.) Hill var. inermis Bisch.
             Sonchus asper (L.) Hill f. gracilis A.F.Schwarz var. inermis Bisch.
             Sonchus asper (L.) Hill var. pungens Bisch.
    Sonchus oleraceus L.*+
        common sow-thistle, field sow-thistle
  Genus: Tagetes

    Tagetes patula L.*+
        French marigold
  Genus: Tanacetum

    Tanacetum parthenium (L.) Sch.Bip.*+
        feverfew
             Chrysanthemum parthenium (L.) Bernh.
             Matricaria parthenium L.
    Tanacetum vulgare L.*+
        common tansy, golden-buttons, tansy
             Chrysanthemum vulgare (L.) Bernh.
             Tanacetum vulgare L. f. crispum (L.) Fernald
             Tanacetum vulgare L. var. crispum L.
  Genus: Taraxacum

    Taraxacum laevigatum (Willd.) DC.+
        red-seeded dandelion, rock dandelion
             Leontodon erythrospermum (Andrz.) Britton
             Taraxacum disseminatum G.E.Haglund
             Taraxacum erythrospermum Andrz. ex Besser
             Taraxacum lacistophyllum (Dahlst.) Raunk.
             Taraxacum scanicum Dahlst.
    Taraxacum officinale Weber*+
        common dandelion
  Genus: Tragopogon

    Tragopogon dubius Scop.*+
        fistulous goat's-beard, greater sand goat's-beard, yellow salsify
             Tragopogon dubius Scop. subsp. major
             Tragopogon major Jacq.
    Tragopogon pratensis L.
        lesser goat's-beard, meadow salsify, showy goat's-beard, yellow goat's-beard
  Genus: Vernonia

    Vernonia fasciculata Michx. subsp. fasciculata*+
        common ironweed, prairie ironweed, smooth ironweed
             Vernonia fasciculata Michx. var. fasciculata
  Genus: Xanthium

    Xanthium strumarium L.*+
        common cocklebur, rough cocklebur
    Xanthium strumarium L. var. canadense (Mill.) Torr. & A.Gray+
        common cocklebur, rough cocklebur
             Xanthium acerosum Greene
             Xanthium californicum Greene
             Xanthium californicum Greene var. rotundifolium Widder
             Xanthium campestre Greene
             Xanthium canadense Mill.
             Xanthium cavanillesii Schouw
             Xanthium cenchroides Millsp. & Sherff
             Xanthium commune Britton
             Xanthium echinatum Murray
             Xanthium glanduliferum Greene
             Xanthium italicum Moretti
             Xanthium macounii Britton
             Xanthium oligacanthum Piper
             Xanthium oviforme Wallr.
             Xanthium pensylvanicum Wallr.
             Xanthium saccharatum Wallr.
             Xanthium speciosum Kearney
             Xanthium strumarium L. subsp. italicum
             Xanthium strumarium L. var. oviforme (Wallr.) M.Peck
             Xanthium strumarium L. var. pensylvanicum (Wallr.) M.Peck
             Xanthium varians Greene
Family: Azollaceae
  Genus: Azolla

    Azolla mexicana C.Presl+
        floating-fern, Mexican azolla, Mexican mosquito-fern
Family: Balsaminaceae
  Genus: Impatiens

    Impatiens balfourii Hook.f.*+
        Balfour's touch-me-not
    Impatiens balsamina L.+
        balsam, spotted snap-weed
    Impatiens capensis Meerb.*+
        orange jewelweed, orange touch-me-not, spotted touch-me-not
             Impatiens biflora Walter
             Impatiens capensis Meerb. f. immaculata (Weath.) Fernald & B.G.Schub.
             Impatiens fulva Nutt.
             Impatiens noli-tangere L. subsp. biflora
             Impatiens nortonii Rydb.
    Impatiens pallida Nutt.*+
        pale touch-me-not, yellow jewelweed, yellow touch-me-not
Family: Berberidaceae
  Genus: Berberis

    Berberis thunbergii DC.*+
        Japanese barberry
    Berberis vulgaris L.*+
        Common barberry, European barberry
  Genus: Caulophyllum

    Caulophyllum thalictroides (L.) Michx.*+
        blue cohosh, papoose-root, squaw-root
             Caulophyllum thalictroides (L.) Michx. var. thalictroides
             Leontice thalictroides L.
  Genus: Jeffersonia

    Jeffersonia diphylla (L.) Pers.*+
        rheumatism root, twinleaf
             Podophyllum diphyllum L.
  Genus: Podophyllum

    Podophyllum peltatum L.*+
        May-apple, wild mandrake
             Podophyllum peltatum L. f. aphyllum Plitt
             Podophyllum peltatum L. f. biltmoreanum Steyerm.
             Podophyllum peltatum L. f. deamii Raymond
             Podophyllum peltatum L. f. polycarpum (Clute) Plitt
Family: Betulaceae
  Genus: Alnus

    Alnus glutinosa (L.) Gaertn.*+
        black alder, European alder
             Alnus alnus (L.) Britton
             Alnus vulgaris Hill
             Betula alnus L. var. glutinosa L.
    Alnus incana (L.) Moench subsp. rugosa*+
        mountain alder, speckled alder, swamp alder
             Alnus glauca Michx.
             Alnus incana (L.) Moench f. tomophylla Fernald
             Alnus incana (L.) Moench var. americana Regel
             Alnus rugosa (Du Roi) Spreng.
             Alnus rugosa (Du Roi) Spreng. var. americana (Regel) Fernald
             Alnus rugosa (Du Roi) Spreng. var. tomophylla (Fernald) Fernald
             Betula alnus L. var. rugosa Du Roi
  Genus: Betula

    Betula alleghaniensis Britton*+
        yellow birch
             Betula alleghaniensis Britton var. alleghaniensis
             Betula alleghaniensis Britton var. fallax (Fassett) Brayshaw
             Betula alleghaniensis Britton var. macrolepis (Fernald) Brayshaw
             Betula lutea F.Michx.
             Betula lutea F.Michx. f. fallax Fassett
             Betula lutea F.Michx. var. macrolepis Fernald
             Betula purpusii C.K.Schneid. f. fallax (Fassett) B.Boivin
    Betula cordifolia Regel*+
        heart-leaf birch, mountain white birch
             Betula alba L. var. cordifolia (Regel) Regel
             Betula papyrifera Marshall var. cordifolia (Regel) Fernald
    Betula nigra L.*+
        black birch, red birch, river birch
             Betula rubra F.Michx.
    Betula papyrifera Marshall*+
        canoe birch, paper birch, white birch
             Betula alba L. var. elobata Fernald
             Betula alba L. var. papyrifera (Marshall) Spach
             Betula papyracea Aiton
             Betula papyrifera Marshall var. elobata (Fernald) Sarg.
             Betula papyrifera Marshall var. macrostachya Fernald
             Betula papyrifera Marshall var. papyrifera
             Betula papyrifera Marshall var. pensilis Fernald
             Betula papyrifera Marshall var. commutata (Regel) Fernald
             Betula papyrifera Marshall var. subcordata (Rydb.) Sarg.
             Betula subcordata Rydb.
    Betula pendula Roth*+
        European white birch, weeping birch
    Betula populifolia Marshall
        gray birch, white birch
    Betula pumila L.*+
        bog birch, dwarf birch, swamp birch
             Betula borealis Spach
             Betula glandulifera (Regel) B.T.Butler
             Betula glandulosa Michx. var. glandulifera (Regel) Gleason
             Betula glandulosa Michx. var. hallii (T.J.Howell) C.L.Hitchc.
             Betula hallii T.J.Howell
             Betula nana L. var. glandulifera (Regel) B.Boivin
             Betula pubescens Ehrh. subsp. borealis
             Betula pumila L. var. glandulifera Regel
             Betula pumila L. var. glabra Regel
             Betula pumila L. var. pumila
             Betula pumila L. var. renifolia Fernald
    Betula X sandbergii Britton X *+
        Sandberg's birch
  Genus: Corylus

    Corylus americana Walter*+
        American hazelnut
             Corylus americana Walter f. missouriensis (A.DC.) Fernald
             Corylus americana Walter var. altior Fernald
             Corylus americana Walter var. indehiscens E.J.Palmer & Steyerm.
             Corylus americana Walter var. missourensis A.DC.
  Genus: Ostrya

    Ostrya virginiana (Mill.) K.Koch*+
        eastern hop-hornbeam, ironwood
             Carpinus virginiana Mill.
             Ostrya virginica Willd. var. glandulosa Spach
             Ostrya virginiana (Mill.) K.Koch f. glandulosa (Spach) J.F.Macbr.
             Ostrya virginiana (Mill.) K.Koch f. virginiana
             Ostrya virginiana (Mill.) K.Koch subsp. lasia
             Ostrya virginiana (Mill.) K.Koch var. glandulosa (Spach) Sarg.
             Ostrya virginiana (Mill.) K.Koch var. lasia Fernald
             Ostrya virginiana (Mill.) K.Koch var. virginiana
Family: Bignoniaceae
  Genus: Campsis

    Campsis radicans (L.) Seem. ex Bureau*+
        trumpet-creeper
             Bignonia radicans L.
             Tecoma radicans (L.) Juss.
  Genus: Catalpa

    Catalpa ovata G.Don*+
        Chinese catalpa
    Catalpa speciosa (Warder ex Barney) Warder ex Engelm.*+
        northern catalpa
Family: Boraginaceae
  Genus: Cynoglossum

    Cynoglossum amabile Stapf & J.R.Drumm.+
        Chinese forget-me-not, Chinese hound's-tongue
    Cynoglossum officinale L.*+
        common hound's-tongue, gypsy-flower
             Cynoglossum officinale L. f. bicolor (Willd.) Lehm.
  Genus: Echium

    Echium vulgare L.*+
        blueweed, common viper's-bugloss, viper's-bugloss
  Genus: Hackelia

    Hackelia deflexa (Wahlenb.) Opiz var. americana (A.Gray) Fernald & I.M.Johnst.*+
        American stickseed, cliff stickseed, nodding stickseed
             Echinospermum deflexum (Wahlenb.) Lehm. var. americanum A.Gray
             Hackelia americana (A.Gray) Fernald
             Hackelia deflexa (Wahlenb.) Opiz subsp. americana
             Lappula americana (A.Gray) Rydb.
             Lappula deflexa (Wahlenb.) Garcke subsp. americana
             Lappula deflexa (Wahlenb.) Garcke var. americana (A.Gray) Greene
    Hackelia virginiana (L.) I.M.Johnst.*+
        beggar's-lice, stickseed, wild comfrey
             Lappula virginiana (L.) Greene
             Myosotis virginiana L.
  Genus: Lappula

    Lappula redowskii (Hornem.) Greene var. redowskii +
        western stickseed
             Echinospermum redowskii (Hornem.) Lehm. var. occidentalis S.Watson
             Lappula echinata Gilib. var. occidentalis (S.Watson) B.Boivin
             Lappula occidentalis (S.Watson) Greene
             Lappula occidentalis (S.Watson) Greene var. occidentalis
             Lappula redowskii (Hornem.) Greene var. occidentalis (S.Watson) Rydb.
    Lappula squarrosa (Retz.) Durmort.+
        European stickseed, spiny stickseed, two-row stickseed
             Echinospermum fremontii Torr.
             Lappula echinata Gilib.
             Lappula erecta A.Nelson
             Lappula fremontii (Torr.) Greene
             Lappula lappula (L.) H.Karst.
             Lappula myosotis Moench
             Lappula squarrosa (Retz.) Durmort. var. erecta (A.Nelson) Dorn
             Myosotis squarrosa Retz.
  Genus: Lithospermum

    Lithospermum canescens (Michx.) Lehm.*+
        hoary puccoon
             Batschia canescens Michx.
    Lithospermum caroliniense (Walter ex J.F.Gmel.) MacMill. subsp. croceum*+
        Carolina puccoon, hairy puccoon, plains puccoon
             Batschia gmelinii Michx.
             Lithospermum caroliniense (Walter ex J.F.Gmel.) MacMill. var. croceum (Fernald) Cronquist
             Lithospermum croceum Fernald
             Lithospermum gmelinii (Michx.) Hitchc.
    Lithospermum incisum Lehm.*+
        fringed puccoon, narrow-leaved gromwell, narrow-leaved puccoon
             Batschia linearifolia (Goldie) Small
             Lithospermum angustifolium Michx.
             Lithospermum linearifolium Goldie
             Lithospermum mandanense Spreng.
  Genus: Mertensia

    Mertensia virginica (L.) Pers. ex Link*+
        eastern bluebells, Virginia bluebells, Virginia cowslip
  Genus: Myosotis

    Myosotis laxa Lehm.+
        bay forget-me-not, small forget-me-not
    Myosotis scorpioides L.*+
        common forget-me-not, forget-me-not, true forget-me-not, water scorpion-grass
             Myosotis palustris (L.) Hill
    Myosotis verna Nutt.+
        early scorpion-grass, white forget-me-not
             Myosotis virginica auct. non (L.) Britton, Sterns & Poggenb.
  Genus: Onosmodium

    Onosmodium bejariense A.DC.*+
        marble-seed, smooth onosmodium, western false gromwell
    Onosmodium bejariense A.DC. var. hispidissimum (Mack.) B.L.Turner+
        false gromwell, marble-seed, soft-hair marble-seed
             Lithospermum carolinianum auct. non Lam.
             Onosmodium hispidissimum Mack.
             Onosmodium hispidissimum Mack. var. macrospermum Mack. & Bush
             Onosmodium molle Michx. subsp. hispidissimum
             Onosmodium molle Michx. var. hispidissimum (Mack.) Cronquist
    Onosmodium bejariense A.DC. var. occidentale (Mack.) B.L.Turner+
        marble-seed, western false gromwell
             Onosmodium molle Michx. subsp. occidentale
             Onosmodium molle Michx. var. occidentale (Mack.) I.M.Johnst.
             Onosmodium occidentale Mack.
             Onosmodium occidentale Mack. var. sylvestre Mack.
Family: Brassicaceae
  Genus: Alliaria

    Alliaria petiolata (M.Bieb.) Cavara & Grande*+
        garlic mustard
             Alliaria alliaria (L.) Britton
             Alliaria officinalis Andrz. ex M.Bieb.
             Arabis petiolata M.Bieb.
             Erysimum alliaria L.
             Sisymbrium alliaria (L.) Scop.
  Genus: Alyssum

    Alyssum alyssoides (L.) L.+
        pale alyssum, pale madwort, yellow alyssum
             Alyssum calycinum L.
             Clypeola alyssoides (L.) L.
  Genus: Arabidopsis

    Arabidopsis thaliana (L.) Heynh.*+
        mouse-ear-cress, thale-cress
             Arabis thaliana L.
             Sisymbrium thalianum (L.) J.Gay & Monnard
  Genus: Arabis

    Arabis canadensis L.+
        sickle-pod
    Arabis divaricarpa A.Nelson*+
        spreading-pod rock-cress
             Arabis acutina Greene
             Arabis brachycarpa (Torr. & A.Gray) Britton
             Arabis confinis S.Watson
             Arabis confinis S.Watson var. interposita (Greene) Welsh & Reveal
             Arabis divaricarpa A.Nelson var. dechamplainii B.Boivin
             Arabis divaricarpa A.Nelson var. interposita (Greene) Rollins
             Arabis divaricarpa A.Nelson var. stenocarpa M.Hopkins
             Arabis divaricarpa A.Nelson var. typica Rollins
             Arabis interposita Greene
             Arabis X divaricarpa A.Nelson (pro sp.) X
             Boechera divaricarpa (A.Nelson) A.Löve & D.Löve
             Turritis brachycarpa Torr. & A.Gray
    Arabis drummondii A.Gray+
        Drummond's rock-cress
             Arabis connexa Greene
             Arabis drummondii A.Gray var. connexa (Greene) Fernald
             Arabis drummondii A.Gray var. oxyphylla (Greene) M.Hopkins
             Arabis oxyphylla Greene
             Boechera drummondii (A.Gray) A.Löve & D.Löve
             Erysimum drummondii (A.Gray) Kuntze
             Turritis drummondii (A.Gray) Lunell
    Arabis glabra (L.) Bernh.*+
        tower mustard, tower rock-cress
             Arabis glabra (L.) Bernh. var. glabra
             Turritis glabra L.
    Arabis hirsuta (L.) Scop. var. adpressipilis (M.Hopkins) Rollins+
        hairy rock-cress
             Arabis pycnocarpa M.Hopkins var. adpressipilis M.Hopkins
    Arabis hirsuta (L.) Scop. var. pycnocarpa (M.Hopkins) Rollins+
        cream-flower rock-cress, hairy rock-cress
             Arabis hirsuta (L.) Scop. subsp. pycnocarpa
             Arabis ovata sensu Small, non Michx.
             Arabis pycnocarpa M.Hopkins
             Arabis pycnocarpa M.Hopkins var. pycnocarpa
    Arabis laevigata (Muhl. ex Willd.) Poir. var. laevigata *+
        smooth bank-cress, smooth rock-cress
             Arabis heterophylla Nutt.
             Arabis lyrifolia DC.
             Arabis viridis Harger var. heterophylla (Nutt.) Farw.
             Turritis laevigata Muhl. ex Willd.
    Arabis lyrata L.*+
        lyrate rock-cress, sand cress
             Arabis ambigua DC. var. glabra DC.
             Arabis lyrata L. var. glabra (DC.) M.Hopkins
             Arabis lyrata L. var. lyrata
             Arabis lyrata L. var. occidentalis S.Watson
             Arabis lyrata L. var. typica M.Hopkins
             Arabis lyrata L. f. parvisiliqua M.Hopkins var. typica M.Hopkins
    Arabis shortii (Fernald) Gleason*+
        Short's rock-cress, toothed cress
             Arabis dentata (Torr.) Torr. & A.Gray
             Arabis dentata (Torr.) Torr. & A.Gray var. phalacrocarpa M.Hopkins
             Arabis perstellata E.L.Braun var. phalacrocarpa (M.Hopkins) Fernald
             Arabis perstellata E.L.Braun var. shortii Fernald
             Arabis shortii (Fernald) Gleason var. phalacrocarpa (M.Hopkins) Steyerm.
             Iodanthus dentatus (Torr.) Greene
             Sisymbrium dentatum Torr.
  Genus: Armoracia

    Armoracia rusticana P.Gaertn., B.Mey. & Scherb.*+
        horseradish
             Armoracia armoracia (L.) Cockerell ex Daniels
             Armoracia lapathifolia Gilib.
             Cochlearia armoracia L.
             Nasturtium armoracia (L.) Fr.
             Radicula armoracia (L.) B.L.Rob.
             Rorippa armoracia (L.) Hitchc.
  Genus: Barbarea

    Barbarea orthoceras Ledeb.+
        American yellow-rocket, northern winter-cress
             Barbarea americana Rydb.
             Barbarea orthoceras Ledeb. var. dolichocarpa Fernald
    Barbarea vulgaris R.Br.*+
        garden yellow-rocket, winter-cress, yellow-rocket
             Barbarea arcuata (Opiz ex J.Presl & C.Presl) Rchb.
             Barbarea stricta Andrz.
             Barbarea vulgaris R.Br. var. arcuata (Opiz ex J.Presl & C.Presl) Fr.
             Barbarea vulgaris R.Br. var. brachycarpa Rouy & Foucaud
             Barbarea vulgaris R.Br. var. longisiliquosa Carion
             Barbarea vulgaris R.Br. var. sylvestris Fr.
             Campe barbarea (L.) W.Wight ex Piper
             Campe stricta (Andrz.) W.Wight ex Piper
  Genus: Berteroa

    Berteroa incana (L.) DC.*+
        hoary false madwort, hoary-alyssum
             Alyssum incanum L.
  Genus: Brassica

    Brassica juncea (L.) Czern.*+
        brown mustard, Chinese mustard, Indian mustard
             Brassica integrifolia (Willd.) Rupr.
             Brassica japonica Thunb.
             Brassica juncea (L.) Czern. var. crispifolia L.H.Bailey
             Brassica juncea (L.) Czern. var. japonica (Thunb.) L.H.Bailey
             Brassica juncea (L.) Czern. var. juncea
             Brassica willdenowii Boiss.
             Sinapis juncea L.
    Brassica napus L.*+
        rape, rutabaga, turnip
             Brassica napobrassica (L.) Mill.
             Brassica napus L. var. napobrassica (L.) Rchb.
    Brassica nigra (L.) W.D.J.Koch*+
        black mustard
             Sinapis nigra L.
    Brassica rapa L.*+
        field mustard, rape mustard, turnip
             Brassica campestris L.
             Brassica rapa L. var. rapa
  Genus: Cakile

    Cakile lacustris (Fernald) Pobed.*+
        sea-rocket
             Cakile edentula (Bigelow) Hook. var. lacustris Fernald subsp. edentula
             Cakile edentula (Bigelow) Hook. subsp. lacustris
             Cakile edentula (Bigelow) Hook. var. lacustris Fernald
  Genus: Camelina

    Camelina microcarpa Andrz. ex DC.*+
        little-pod false flax, small-fruited false flax
             Camelina sativa (L.) Crantz subsp. microcarpa
    Camelina sativa (L.) Crantz+
        gold-of-pleasure, large-seed false flax
             Camelina parodii Ibarra & La Porte
             Camelina sativa (L.) Crantz subsp. sativa
             Myagrum sativum L.
  Genus: Capsella

    Capsella bursa-pastoris (L.) Medik.*+
        shepherd's-purse
             Bursa bursa-pastoris (L.) Britton
             Bursa bursa-pastoris (L.) Britton var. bifida Crép.
             Bursa gracilis Gren.
             Bursa rubella (Reut.) Druce
             Capsella bursa-pastoris (L.) Medik. f. arachnoidea Hus
             Capsella rubella Reut.
             Thlaspi bursa-pastoris L.
  Genus: Cardamine

    Cardamine bulbosa (Schreb. ex Muhl.) Britton, Sterns & Poggenb.*+
        spring-cress
             Arabis bulbosa Schreb. ex Muhl.
             Arabis rhomboidea Pers.
             Cardamine rhomboidea (Pers.) DC.
    Cardamine concatenata (Michx.) O.Schwarz*+
        cut-leaved toothwort, five-parted toothwort
             Cardamine laciniata (Muhl. ex Willd.) A.W.Wood
             Dentaria concatenata Michx.
             Dentaria concatenata Michx. var. coalescens Fernald
             Dentaria laciniata Muhl. ex Willd.
             Dentaria laciniata Muhl. ex Willd. var. integra (O.E.Schulz) Fernald
    Cardamine flexuosa With.
        bending bitter-cress
             Cardamine hirsuta L. subsp. flexuosa
             Cardamine konaensis H.St.John
    Cardamine parviflora L. var. arenicola (Britton) O.E.Schulz*+
        dry-land bitter-cress, sand bitter-cress, small-flowered bitter-cress
             Cardamine arenicola Britton
    Cardamine pensylvanica Muhl. ex Willd.*+
        Pennsylvania bitter-cress
             Cardamine hirsuta L. var. pensylvanica Muhl. ex Willd.
             Cardamine pensylvanica Muhl. ex Willd. var. brittoniana Farw.
    Cardamine pratensis L. var. palustris Wimm. & Grab.*+
        cuckoo-flower
  Genus: Cardaria

    Cardaria draba (L.) Desv.+
        heart-podded hoary-cress, pepper-weed white-top, white-top
             Cardaria draba (L.) Desv. subsp. draba
             Lepidium draba L.
  Genus: Conringia

    Conringia orientalis (L.) Dumort.+
        hare-ear mustard, treacle mustard
             Brassica orientalis L.
  Genus: Descurainia

    Descurainia pinnata (Walter) Britton subsp. brachycarpa*+
        green tansy mustard, pinnate tansy mustard, western tansy mustard
             Descurainia brachycarpa (Richardson) O.E.Schulz
             Descurainia pinnata (Walter) Britton var. brachycarpa (Richardson) Fernald
             Sisymbrium brachycarpum Richardson
             Sisymbrium canescens Nutt. var. brachycarpa (Richardson) S.Watson
             Sophia brachycarpa (Richardson) Rydb.
    Descurainia sophia (L.) Webb ex Prantl*+
        flix-weed, herb-Sophia, tansy mustard
             Sisymbrium sophia L.
             Sophia sophia (L.) Britton
  Genus: Diplotaxis

    Diplotaxis muralis (L.) DC.*+
        sand rocket, stinking wall-rocket
             Sisymbrium murale L.
  Genus: Draba

    Draba reptans (Lam.) Fernald*+
        Carolina whitlow-grass, common whitlow-grass
             Draba caroliniana Walter
             Draba caroliniana Walter f. stellifera O.E.Schulz
             Draba micrantha Nutt.
             Draba reptans (Lam.) Fernald f. micrantha (Nutt.) C.L.Hitchc.
             Draba reptans (Lam.) Fernald f. reptans
             Draba reptans (Lam.) Fernald subsp. stellifera
             Draba reptans (Lam.) Fernald var. micrantha (Nutt.) Fernald
             Draba reptans (Lam.) Fernald var. reptans
             Draba reptans (Lam.) Fernald var. stellifera (O.E.Schulz) C.L.Hitchc.
             Draba reptans (Lam.) Fernald var. typica C.L.Hitchc.
  Genus: Erucastrum

    Erucastrum gallicum (Willd.) O.E.Schulz*+
        common dog-mustard, dog-mustard
             Brassica erucastrum L.
             Erucastrum pollichii Schimp. & Spenn.
             Sisymbrium gallicum Willd.
  Genus: Erysimum

    Erysimum cheiranthoides L.*+
        worm-seed mustard, worm-seed wallflower
             Cheirinia cheiranthoides (L.) Link
             Erysimum cheiranthoides L. subsp. altum
    Erysimum durum J.Presl & C.Presl+
        wallflower
             Erysimum hieracifolium L. (sensu lato)
             Erysimum hieracifolium L. subsp. durum
    Erysimum inconspicuum (S.Watson) MacMill.+
        small worm-seed mustard, shy wallflower
             Cheirinia inconspicua (S.Watson) Britton
             Erysimum asperum (Nutt.) DC. var. inconspicuum S.Watson
             Erysimum inconspicuum (S.Watson) MacMill. var. inconspicuum
             Erysimum parviflorum Nutt.
  Genus: Hesperis

    Hesperis matronalis L.*+
        dame's rocket
  Genus: Lepidium

    Lepidium campestre (L.) R.Br.*+
        fieldcress, field pepper-weed
             Neolepia campestris (L.) W.A.Weber
             Thlaspi campestre L.
    Lepidium densiflorum Schrad.*+
        prairie pepper-weed, small peppergrass
    Lepidium densiflorum Schrad. var. densiflorum +
        prairie pepper-weed, small peppergrass
             Lepidium apetulum auct. non Willd.
             Lepidium densiflorum Schrad. var. typicum Thell.
             Lepidium neglectum Thell.
             Lepidium texanum Buckley
    Lepidium densiflorum Schrad. var. macrocarpum G.A.Mulligan+
        big-seed pepper-weed
    Lepidium virginicum L. var. virginicum *+
        common peppergrass, poor-man's-pepper, Virginia pepper-weed
             Lepidium virginicum L. var. typicum C.L.Hitchc.
  Genus: Lobularia

    Lobularia maritima (L.) Desv.+
        seaside lobularia, sweet-alyssum
             Alyssum maritimum (L.) Lam.
             Clypeola maritima L.
             Koniga maritima (L.) R.Br.
  Genus: Malcolmia

    Malcolmia maritima (L.) R.Br.+
        Virginia stock
             Cheiranthus maritimus L.
  Genus: Nasturtium

    Nasturtium microphyllum Boenn. ex Rchb.+
        one-row yellow-cress, watercress
             Nasturtium fontanum Asch. var. longisiliquum Irmisch
             Nasturtium officinale R.Br. var. microphyllum (Boenn. ex Rchb.) Thell.
             Rorippa microphylla (Boenn. ex Rchb.) Hyl. ex A.Löve & D.Löve
             Rorippa nasturtium-aquaticum (L.) Hayek var. longisiliqua (Irmisch) B.Boivin
    Nasturtium officinale R.Br.*+
        watercress
             Nasturtium nasturtium-aquaticum (L.) H.Karst.
             Nasturtium officinale R.Br. f. nanum Glück
             Nasturtium officinale R.Br. f. siifolium Rchb.
             Nasturtium officinale R.Br. f. submersum Glück
             Nasturtium officinale R.Br. f. terrestre Glück
             Nasturtium officinale R.Br. var. siifolium (Rchb.) W.D.J.Koch
             Radicula nasturtium-aquaticum (L.) Britten & Rendle
             Rorippa nasturtium-aquaticum (L.) Hayek
             Sisymbrium nasturtium-aquaticum L.
  Genus: Neslia

    Neslia paniculata (L.) Desv.+
        ball mustard
             Myagrum paniculatum L.
  Genus: Raphanus

    Raphanus raphanistrum L.+
        jointed charlock, white charlock, wild radish
    Raphanus sativus L.*+
        garden radish, wild radish
             Raphanus raphanistrum L. var. sativus (L.) Beck
  Genus: Rorippa

    Rorippa austriaca (Crantz) Besser+
        Austrian fieldcress, Austrian yellow-cress, field yellow-cress
             Nasturtium austriacum Crantz
    Rorippa palustris (L.) Besser subsp. fernaldiana+
        Fernald's yellow-cress, marsh-cress
             Rorippa hispida (Desv.) Britton var. glabrata Lunell
             Rorippa islandica (Oeder) Borbás subsp. fernaldiana
             Rorippa islandica (Oeder) Borbás var. fernaldiana Butters & Abbe
             Rorippa islandica (Oeder) Borbás var. glabra (O.E.Schulz) Welsh & Reveal
             Rorippa islandica (Oeder) Borbás var. glabrata (Lunell) Butters & Abbe
             Rorippa palustris (L.) Besser subsp. glabra
             Rorippa palustris (L.) Besser var. fernaldiana (Butters & Abbe) Stuckey subsp. glabra
             Rorippa palustris (L.) Besser var. cernua (Nutt.) Stuckey
             Rorippa palustris (L.) Besser var. dictyota (Greene) Stuckey
             Rorippa palustris (L.) Besser var. elongata Stuckey
             Rorippa palustris (L.) Besser var. fernaldiana (Butters & Abbe) Stuckey
             Rorippa palustris (L.) Besser var. glabrata (Lunell) Stuckey
             Rorippa palustris (L.) Besser var. glabra (O.E.Schulz) Stuckey
    Rorippa palustris (L.) Besser subsp. hispida+
        hispid marsh-cress, hispid yellow-cress
             Brachiolobos hispidus Desv.
             Radicula hispida (Desv.) Britton
             Rorippa hispida (Desv.) Britton
             Rorippa islandica (Oeder) Borbás var. hispida (Desv.) Butters & Abbe
             Rorippa palustris (L.) Besser var. hispida (Desv.) Rydb.
    Rorippa sylvestris (L.) Besser*+
        creeping yellow-cress
             Radicula sylvestris (L.) Druce
  Genus: Sinapis

    Sinapis arvensis L.*+
        California rape, charlock mustard
             Brassica arvensis (L.) Rabenh.
             Brassica kaber (DC.) L.C.Wheeler
             Brassica kaber (DC.) L.C.Wheeler var. pinnatifida (Stokes) L.C.Wheeler
             Brassica kaber (DC.) L.C.Wheeler var. schkuhriana (Rchb.) L.C.Wheeler
  Genus: Sisymbrium

    Sisymbrium altissimum L.*+
        tall tumble mustard
             Norta altissima (L.) Britton
    Sisymbrium loeselii L.+
        small tumbleweed mustard, tall hedge-mustard
    Sisymbrium officinale (L.) Scop.*+
        hedge-mustard
             Erysimum officinale L.
             Sisymbrium officinale (L.) Scop. var. leiocarpum DC.
             Sisymbrium officinale (L.) Scop. var. officinale
  Genus: Thlaspi

    Thlaspi arvense L.*+
        field pennycress
Family: Buxaceae
  Genus: Pachysandra

    Pachysandra terminalis Siebold & Zucc.
        Japanese pachysandra, Japanese spurge
Family: Cabombaceae
  Genus: Brasenia

    Brasenia schreberi J.F.Gmel.*+
        water-shield
             Brasenia peltata Pursh
Family: Cactaceae
  Genus: Opuntia

    Opuntia macrorhiza Engelm.*+
             Opuntia compressa J.F.Macbr. var. grandiflora (Engelm.) Weniger
             Opuntia compressa J.F.Macbr. var. macrorhiza (Engelm.) L.D.Benson
             Opuntia compressa J.F.Macbr. var. stenochila (Engelm.) Weniger
             Opuntia grandiflora Engelm.
             Opuntia leptocarpa Mackensen
             Opuntia mackensenii Rose
             Opuntia macrorhiza Engelm. var. macrorhiza
             Opuntia mesacantha Raf. var. macrorhiza (Engelm) J.M.Coult.
             Opuntia plumbea Rose
             Opuntia tortispina Engelm. & Bigelow
Family: Caesalpiniaceae
  Genus: Chamaecrista

    Chamaecrista fasciculata (Michx.) Greene*+
        golden cassia, locust-weed, partridge pea, sleeping-plant
             Cassia brachiata (Pollard) J.F.Macbr.
             Cassia chamaecrista L.
             Cassia fasciculata Michx.
             Cassia fasciculata Michx. var. brachiata (Pollard) Pullen ex Isely
             Cassia fasciculata Michx. var. depressa (Pollard) J.F.Macbr.
             Cassia fasciculata Michx. var. ferrisiae (Britton ex Britton & Rose) B.L.Turner
             Cassia fasciculata Michx. var. macrosperma Fernald
             Cassia fasciculata Michx. var. puberula (Greene) J.F.Macbr.
             Cassia fasciculata Michx. var. robusta (Pollard) J.F.Macbr.
             Cassia fasciculata Michx. var. rostrata (Wooton & Standl.) B.L.Turner
             Cassia fasciculata Michx. var. tracyi (Pollard) J.F.Macbr.
             Cassia mississippiensis Pollard
             Cassia robusta (Pollard) Pollard
             Cassia rostrata (Wooton & Standl.) Tidestr. ex Tidestr.
             Chamaecrista brachiata Pollard
             Chamaecrista depressa (Pollard) Greene
             Chamaecrista fasciculata (Michx.) Greene var. macrosperma (Fernald) C.F.Reed
             Chamaecrista littoralis Pollard
             Chamaecrista mississippiensis (Pollard) Pollard ex A.Heller
             Chamaecrista robusta (Pollard) Pollard ex A.Heller
             Chamaecrista rostrata Wooton & Standl.
             Chamaecrista tracyi Pollard
  Genus: Gleditsia

    Gleditsia triacanthos L.*+
        honey locust
             Caesalpiniodes triacanthum (L.) Kuntze
             Calliandra inermis (L.) Druce
             Gleditsia inermis L.
             Gleditsia triacanthos L. f. inermis (L.) Zabel
             Gleditsia triacanthos L. var. inermis (L.) Castigl.
  Genus: Gymnocladus

    Gymnocladus dioica (L.) K.Koch*+
        Kentucky coffee-tree
             Guilandina dioica L.
  Genus: Senna

    Senna hebecarpa (Fernald) H.S.Irwin & Barneby*+
        American wild sensitive-plant, northern wild senna
             Cassia hebecarpa Fernald
             Cassia hebecarpa Fernald var. longipila E.L.Braun
             Senna hebecarpa (Fernald) H.S.Irwin & Barneby var. longipila (E.L.Braun) C.F.Reed
Family: Callitrichaceae
  Genus: Callitriche

    Callitriche heterophylla Pursh+
        large water-starwort
             Callitriche anceps Fernald
             Callitriche heterophylla Pursh subsp. heterophylla
    Callitriche palustris L.*+
        common water-starwort, vernal water-starwort
             Callitriche palustris L. var. verna (L.) Fenley ex Jeps.
             Callitriche verna L.
    Callitriche stagnalis Scop. emend Kütz.+
        pond water-starwort
Family: Campanulaceae
  Genus: Campanula

    Campanula americana L.*+
        American bellflower, tall bellflower
             Campanulastrum americanum (L.) Small
             Campanula americana L. var. illinoensis (Fresen.) Farw.
    Campanula aparinoides Pursh*+
        marsh bellflower
    Campanula aparinoides Pursh var. aparinoides +
        marsh bellflower
    Campanula aparinoides Pursh var. grandiflora Holz.+
        marsh bellflower
             Campanula aparinoides Pursh var. uliginosa (Rydb.) Gleason
             Campanula uliginosa Rydb.
    Campanula rapunculoides L.*+
        creeping bellflower, European bellflower, rampion bellflower, rover bellflower
             Campanula rapunculoides L. var. ucranica (Besser) K.Koch
    Campanula rotundifolia L.*+
        bluebell, bluebell bellflower, harebell
             Campanula alaskana (A.Gray) W.Wight ex J.P.Anderson
             Campanula dubia A.DC.
             Campanula heterodoxa Bong.
             Campanula intercedens Witasek
             Campanula petiolata A.DC.
             Campanula rotundifolia L. var. alaskana A.Gray
             Campanula rotundifolia L. var. intercedens (Witasek) Farw.
             Campanula rotundifolia L. var. lancifolia Mert. & W.D.J.Koch
             Campanula rotundifolia L. var. petiolata (A.DC.) J.K.Henry
             Campanula rotundifolia L. var. velutina A.DC.
             Campanula sacajaweana M.Peck
  Genus: Triodanis

    Triodanis perfoliata (L.) Nieuwl.*+
        clasping Venus'-looking-glass, round-leaved triodanis
             Legousia perfoliata (L.) Britton
             Specularia perfoliata (L.) A.DC.
             Triodanis perfoliata (L.) Nieuwl. var. perfoliata
Family: Cannabaceae
  Genus: Cannabis

    Cannabis sativa L.*+
        hemp, Indian hemp, marijuana
             Cannabis indica Lam.
             Cannabis indica Lam. var. kafiristanica Vavilov
             Cannabis ruderalis Janisch.
             Cannabis sativa L. subsp. indica
             Cannabis sativa L. var. indica subsp. indica
             Cannabis sativa L. var. kafiristanica (Vavilov) E.Small & Cronquist subsp. indica
             Cannabis sativa L. subsp. sativa
             Cannabis sativa L. var. sativa subsp. sativa
             Cannabis sativa L. var. spontanea Vavilov subsp. sativa
  Genus: Humulus

    Humulus japonicus Siebold & Zucc.*+
        Japanese hop
             Humulus scandens auct. non (Lour.) Merr.
    Humulus lupulus L. var. lupuloides E.Small+
        common hop, hop
             Humulus americanus Nutt.
             Humulus lupulus L. subsp. americanus
Family: Capparidaceae
  Genus: Polanisia

    Polanisia dodecandra (L.) DC.*+
        rough-seed clammy-weed
    Polanisia dodecandra (L.) DC. subsp. dodecandra*+
        rough-seed clammy-weed
             Cleome dodecandra L.
             Polanisia dodecandra (L.) DC. var. dodecandra
             Polanisia graveolens Raf.
    Polanisia dodecandra (L.) DC. subsp. trachysperma+
        large clammy-weed
             Polanisia dodecandra (L.) DC. var. trachysperma (Torr. & A.Gray) Iltis
             Polanisia trachysperma Torr. & A.Gray
Family: Caprifoliaceae
  Genus: Diervilla

    Diervilla lonicera Mill.*+
        northern bush-honeysuckle
             Diervilla diervilla (L.) MacMill.
             Diervilla lonicera Mill. var. hypomalaca Fernald
             Diervilla lonicera Mill. var. lonicera
             Diervilla trifida Moench
  Genus: Linnaea

    Linnaea borealis L. subsp. americana*+
        twinflower
             Linnaea americana Forbes
             Linnaea borealis L. var. americana (Forbes) Rehder
  Genus: Lonicera

    Lonicera dioica L. var. dioica +
        limber honeysuckle, mountain honeysuckle, red honeysuckle
             Lonicera dioica L. f. trifolia Vict. & Rolland var. dioica
    Lonicera dioica L. var. glaucescens (Rydb.) Butters+
        wild honeysuckle
             Lonicera glaucescens Rydb.
    Lonicera maackii (Rupr.) Maxim.+
        Amur honeysuckle, Maack's honeysuckle
             Lonicera maackii (Rupr.) Herder f. podocarpa Rehder
    Lonicera morrowii A.Gray*+
        Asian fly honeysuckle, Morrow's honeysuckle
    Lonicera reticulata Raf.*+
        grape honeysuckle, yellow honeysuckle
             Lonicera prolifera (Kirchn.) Booth ex Rehder
             Lonicera prolifera (Kirchn.) Booth ex Rehder var. glabra Gleason
             Lonicera prolifera (Kirchn.) Booth ex Rehder var. prolifera
             Lonicera sullivantii A.Gray
    Lonicera tatarica L.*+
        Tartarian honeysuckle
             Lonicera tatarica L. f. albiflora (DC.) House
             Lonicera tatarica L. var. xanthocarpa Endl.
             Xylosteum tataricum (L.) Medik.
    Lonicera X bella Zabel X *+
        showy bush honeysuckle, white-bell honeysuckle
  Genus: Sambucus

    Sambucus canadensis L. var. canadensis *+
        American elder, elderberry
             Sambucus canadensis L. var. laciniata A.Gray
             Sambucus nigra L. subsp. canadensis
    Sambucus racemosa L. var. pubens (Michx.) Koehne subsp. pubens*+
        red elderberry, red-berried elder, scarlet elderberry
             Sambucus pubens Michx.
             Sambucus pubens Michx. f. dissecta (Britton) Schwer.
             Sambucus racemosa L. var. pubens (Michx.) Koehne
  Genus: Symphoricarpos

    Symphoricarpos albus (L.) S.F.Blake var. laevigatus S.F.Blake+
        western snowberry
    Symphoricarpos occidentalis Hook.*+
        western snowberry, wolfberry
    Symphoricarpos orbiculatus Moench*+
        buck-brush, coral-berry, Indian currant
             Symphoricarpos symphoricarpos (L.) MacMill.
  Genus: Triosteum

    Triosteum aurantiacum E.P.Bicknell*+
        early horse-gentian, orange-fruit horse-gentian
    Triosteum aurantiacum E.P.Bicknell var. aurantiacum +
        early horse-gentian, orange-fruit horse-gentian
             Triosteum aurantiacum E.P.Bicknell f. glaucescens (Wiegand) F.C.Lane
             Triosteum aurantiacum E.P.Bicknell var. glaucescens Wiegand
             Triosteum perfoliatum L. var. aurantiacum (E.P.Bicknell) Wiegand
    Triosteum aurantiacum E.P.Bicknell var. illinoense (Wiegand) E.J.Palmer & Steyerm.+
        Illinois horse-gentian, orange-fruit horse-gentian
             Triosteum illinoense (Wiegand) Rydb.
             Triosteum illinoense (Wiegand) Rydb. f. glabrescens F.C.Lane
             Triosteum perfoliatum L. var. illinoense Wiegand
    Triosteum perfoliatum L.*+
        feverwort, late horse-gentian, tinker's-weed, wild-coffee
             Triosteum perfoliatum L. var. perfoliatum
  Genus: Viburnum

    Viburnum acerifolium L.*+
        dockmackie, maple-leaved arrow-wood, maple-leaved viburnum
             Viburnum acerifolium L. f. collinsii Rouleau
             Viburnum acerifolium L. f. eburneum House
             Viburnum acerifolium L. f. ovatum Rehder
             Viburnum acerifolium L. var. acerifolium
    Viburnum dentatum L.
        southern arrow-wood
    Viburnum dentatum L. var. lucidum Aiton*+
        southern arrow-wood
             Viburnum recognitum Fernald
             Viburnum recognitum Fernald var. alabamense McAtee
    Viburnum lantana L.*+
        wayfaring-tree
             Viburnum lantana L. var. sphaerocarpum A.Gray ex Fernald
    Viburnum lentago L.*+
        nannyberry, sheepberry
             Viburnum X vetteri Zabel X
    Viburnum opulus L.*+
        cranberry viburnum, European cranberry-bush, high-bush cranberry
    Viburnum opulus L. subsp. opulus*+
        cranberry viburnum, European cranberry-bush, guelder rose, snowball-bush
             Viburnum opulus L. var. opulus
             Viburnum opulus L. var. roseum L.
    Viburnum opulus L. subsp. trilobum*+
        American cranberry-bush, cranberry viburnum, high-bush cranberry
             Viburnum opulus L. var. americanum Aiton
             Viburnum opulus L. var. trilobum (Marshall) McAtee
             Viburnum trilobum Marshall
    Viburnum prunifolium L.+
        black-haw, smooth black-haw
             Viburnum bushii Ashe
             Viburnum prunifolium L. var. bushii (Ashe) E.J.Palmer & Steyerm.
             Viburnum prunifolium L. var. globosum Nash ex C.K.Schneid.
             Viburnum prunifolium L. var. prunifolium
    Viburnum rafinesquianum Schult.*+
        arrow-wood, downy arrow-wood
    Viburnum rafinesquianum Schult. var. affine (Bush ex C.K.Schneid.) House+
        arrow-wood, downy arrow-wood
             Viburnum affine Bush ex C.K.Schneid.
             Viburnum affine Bush ex C.K.Schneid. var. affine
             Viburnum affine Bush ex C.K.Schneid. var. australe (C.V.Morton) McAtee
             Viburnum australe C.V.Morton
    Viburnum rafinesquianum Schult. var. rafinesquianum +
        arrow-wood, downy arrow-wood
             Viburnum affine Bush ex C.K.Schneid. var. hypomalacum S.F.Blake
Family: Caryophyllaceae
  Genus: Agrostemma

    Agrostemma githago L.+
        corn cockle
  Genus: Arenaria

    Arenaria lateriflora L.*+
        grove sandwort, wood sandwort
             Arenaria lateriflora L. var. angustifolia (Regel) H.St.John
             Arenaria lateriflora L. var. tayloriae H.St.John
             Moehringia lateriflora (L.) Fenzl
             Moehringia lateriflora (L.) Fenzl var. angustifolia Regel
    Arenaria serpyllifolia L.*+
        thyme-leaved sandwort
             Arenaria leptoclados (Rchb.) Guss.
             Arenaria serpyllifolia L. subsp. leptoclados
             Arenaria serpyllifolia L. subsp. serpyllifolia
             Arenaria serpyllifolia L. var. serpyllifolia
             Arenaria serpyllifolia L. var. tenuior Mert. & W.D.J.Koch
    Arenaria stricta Michx. subsp. stricta*+
        rock sandwort, stiff sandwort
             Alsine michauxii Fenzl
             Arenaria macra A.Nelson & J.F.Macbr.
             Arenaria michauxii (Fenzl) Hook.f.
             Arenaria stricta Michx. subsp. macra
             Arenaria stricta Michx. var. puberulenta (M.Peck) C.L.Hitchc.
             Arenaria stricta Michx. var. stricta
             Arenaria stricta Michx. var. uliginosa (Schleich. ex Lam. & DC.) B.Boivin
             Arenaria uliginosa Schleich. ex Lam. & DC.
             Minuartia michauxii (Fenzl) Farw.
             Minuopsis michauxii (Fenzl) W.A.Weber
             Minuartia michauxii (Fenzl) Farw. var. michauxii
             Sabulina stricta (Michx.) Small
  Genus: Cerastium

    Cerastium fontanum Baumg. emend Jalas subsp. vulgare*+
        big mouse-ear chickweed, common chickweed, common mouse-ear, mouse-ear chickweed
             Cerastium adsurgens Greene
             Cerastium fontanum Baumg. subsp. holosteoides
             Cerastium fontanum Baumg. subsp. triviale
             Cerastium holosteoides Fr.
             Cerastium holosteoides Fr. var. vulgare (Hartm.) Hyl.
             Cerastium triviale Link
             Cerastium vulgatum L. 1762, non 1755
             Cerastium vulgare Hartm.
             Cerastium vulgatum L. f. glandulosum (Boenn.) Druce var. hirsutum Fr.
             Cerastium vulgatum L. f. hirsutum var. hirsutum Fr.
             Cerastium vulgatum L. var. hirsutum Fr.
             Cerastium vulgatum L. var. holosteoides (Fr.) Wahlenb.
    Cerastium nutans Raf.*+
        nodding chickweed
             Cerastium nutans Raf. var. nutans
  Genus: Dianthus

    Dianthus armeria L.*+
        Deptford pink
    Dianthus barbatus L.*+
        sweet-William
  Genus: Gypsophila

    Gypsophila scorzonerifolia Ser.+
        garden baby's-breath
  Genus: Lychnis

    Lychnis chalcedonica L.*+
        Maltese cross, scarlet lychnis
    Lychnis coronaria (L.) Desr.*+
        mullein-pink, rose campion
             Agrostemma coronaria L.
             Coronaria coriacea (Moench) Schischk. & Gorschk.
             Silene coronaria (L.) Clairville
    Lychnis flos-cuculi L.*+
        ragged-robin
  Genus: Paronychia

    Paronychia canadensis (L.) A.W.Wood*+
        smooth forked nail-wort, tall forked chickweed
             Anychia canadensis (L.) Britton, Sterns & Poggenb.
             Anychia dichotoma Michx.
             Paronychia dichotoma (Michx.) A.Nelson
    Paronychia fastigiata (Raf.) Fernald var. fastigiata +
        hairy forked nail-wort, low forked chickweed
             Anychia fastigiata Raf.
             Anychia polygonoides Raf.
             Paronychia fastigiata (Raf.) Fernald var. typica Fernald
  Genus: Saponaria

    Saponaria officinalis L.*+
        bouncing-bet, soapwort
             Lychnis saponaria Jess.
  Genus: Silene

    Silene antirrhina L.*+
        sleepy catchfly, sleepy silene
             Silene antirrhina L. f. apetala Farw.
             Silene antirrhina L. f. bicolor Farw.
             Silene antirrhina L. f. deaneana Fernald
             Silene antirrhina L. var. confinis Fernald
             Silene antirrhina L. var. depauperata Rydb.
             Silene antirrhina L. var. divaricata B.L.Rob.
             Silene antirrhina L. var. laevigata Engelm. & A.Gray
             Silene antirrhina L. var. subglaber Engelm. & A.Gray
             Silene antirrhina L. var. vaccarifolia Rydb.
    Silene csereii Baumg.*+
        Balkan catchfly, glaucous campion
    Silene dichotoma Ehrh.+
        dichotoma silene, forked catchfly
    Silene dioica (L.) Clairv.
        morning campion, red catchfly, red campion, red cockle
             Lychnis dioica L.
    Silene latifolia Poir. subsp. alba*+
        bladder campion, white campion, white cockle
             Lychnis alba Mill.
             Lychnis pratensis Rafn
             Lychnis vespertina Sibth.
             Lychnis X loveae B.Boivin X
             Melandrium album (Mill.) Garcke
             Silene alba (Mill.) E.H.L.Krause
             Silene pratensis (Rafn) Godr. & Gren.
             Silene pratensis (Rafn) Godr. & Gren. subsp. pratensis
    Silene nivea (Nutt.) Muhl. ex Otth+
        evening campion, snowy campion, white campion
             Cucubalus niveus Nutt.
    Silene noctiflora L.*+
        night-flowering catchfly, sticky cockle
             Melandrium noctiflorum (L.) Fr.
    Silene regia Sims
        wild pink, royal catchfly
    Silene stellata (L.) W.T.Aiton var. scabrella (Nieuwl.) E.J.Palmer & Steyerm.*+
        starry campion, widow's-frill
             Evactoma stellata (L.) Raf. var. scabrella Nieuwl.
             Lychnis stellata L. var. scabrella (Nieuwl.) E.J.Palmer & Steyerm.
             Silene scabrella (Nieuwl.) G.N.Jones
    Silene vulgaris (Moench) Garcke*+
        bladder-campion, maiden's-tears
             Oberna commutata (Guss.) Ikonn.
             Silene cucubalus Wibel
             Silene inflata (Salisb.) Sm.
             Silene latifolia (Mill.) Britten & Rendle
  Genus: Spergula

    Spergula arvensis L.*+
        corn spurry
  Genus: Spergularia

    Spergularia marina (L.) Griseb.*+
        salt-marsh sand spurry
             Arenaria rubra L. var. marina L.
             Lepigonum leiospermum Kindb.
             Spergularia alata Wiegand
             Spergularia leiosperma (Kindb.) Schmidt
             Spergularia marina (L.) Griseb. var. leiosperma (Kindb.) Gürke
             Spergularia marina (L.) Griseb. var. simonii O.Deg. & I.Deg.
             Spergularia salina J.Presl & C.Presl
             Spergularia salina J.Presl & C.Presl var. salina
             Spergularia sparsiflora (Greene) A.Nelson
             Tissa marina (L.) Britton
             Tissa sparsiflora Greene
  Genus: Stellaria

    Stellaria aquatica (L.) Scop.*+
        giant chickweed, water chickweed
             Alsine aquatica (L.) Britton
             Cerastium aquaticum L.
             Malachium aquaticum (L.) Fr.
             Myosoton aquaticum (L.) Moench
    Stellaria crassifolia Ehrh.+
        fleshy stitchwort
    Stellaria graminea L.*+
        common stitchwort, grass-like starwort, starwort
             Alsine graminea (L.) Britton
    Stellaria longifolia Muhl. ex Willd.*+
        long-leaved stitchwort
    Stellaria longifolia Muhl. ex Willd. var. longifolia +
        long-leaved stitchwort
             Alsine longifolia (Muhl. ex Willd.) Britton
    Stellaria media (L.) Vill.*+
        common chickweed
             Alsine media L.
    Stellaria palustris Retz.+
        European chickweed, marsh stitchwort, meadow starwort
             Alsine glauca (With.) Britton
             Stellaria fennica auct. non (Murb.) Perfil.
             Stellaria glauca With.
  Genus: Vaccaria

    Vaccaria hispanica (Mill.) Rauschert+
        cow-herb, cow soapwort
             Saponaria hispanica Mill.
             Saponaria vaccaria L.
             Vaccaria pyramidata Medik.
             Vaccaria segetalis Garcke ex Aschers.
             Vaccaria vaccaria (L.) Britton
             Vaccaria vulgaris Host
Family: Celastraceae
  Genus: Celastrus

    Celastrus orbiculata Thunb.*+
        Asian bittersweet, Asiatic bittersweet, Oriental bittersweet
    Celastrus scandens L.*+
        American bittersweet, climbing bittersweet
  Genus: Euonymus

    Euonymus alata (Thunb.) Siebold*+
        winged burning-bush, winged euonymus, winged spindle-tree
             Celastrus alatus Thunb.
             Evonymus alata (Thunb.) Siebold
    Euonymus atropurpurea Jacq. var. atropurpurea *+
        burning-bush, eastern wahoo
             Evonymus atropurpurea Jacq.
    Euonymus europaea L.*+
        European spindle-tree
             Evonymus europaea L.
Family: Ceratophyllaceae
  Genus: Ceratophyllum

    Ceratophyllum demersum L.*+
        coon's-tail, hornwort
             Ceratophyllum apiculatum Cham.
             Ceratophyllum demersum L. var. apiculatum (Cham.) Asch.
             Ceratophyllum demersum L. var. apiculatum (Cham.) Garcke
Family: Chenopodiaceae
  Genus: Atriplex

    Atriplex hortensis L.*+
        garden orache
             Atriplex nitens Schkuhr
    Atriplex patula L.*+
        common orache, spear-scale, spear orach, spear saltbush
             Atriplex patula L. subsp. patula
             Atriplex patula L. var. bracteata auct. non Westerl.
             Atriplex patula L. var. hastata A.Gray
             Atriplex patula L. var. japonica Level.
             Atriplex patula L. var. patula
    Atriplex prostrata Boucher ex DC.+
        fat-hen, thin-leaf orach, triangle orache
             Atriplex hastata sensu Aellen, non L.
             Atriplex latifolia Wahlenb.
             Atriplex patula L. subsp. hastata
             Atriplex patula L. var. hastata auct. non (L.) A.Gray
             Atriplex patula L. var. triangularis (Willd.) Thorne & Welsh
             Atriplex triangularis Willd.
  Genus: Chenopodium

    Chenopodium album L.*+
        common lamb's-quarters, lamb's-quarters, pigweed
             Chenopodium album L. f. lanceolatum (Muhl. ex Willd.) Schinz & Thell.
             Chenopodium album L. var. album
             Chenopodium album L. var. lanceolatum (Muhl. ex Willd.) Coss. & Germ.
             Chenopodium album L. var. missouriense (Aellen) Bassett & Crompton
             Chenopodium album L. var. stevensii Aellen
             Chenopodium lanceolatum Muhl. ex Willd.
             Chenopodium missouriense Aellen
    Chenopodium berlandieri Moq.+
        pit-seed goosefoot
    Chenopodium berlandieri Moq. var. zschackei (Murr) Murr ex Asch.+
        pit-seed goosefoot, Zschack's goosefoot
             Chenopodium berlandieri Moq. subsp. platyphyllum
             Chenopodium berlandieri Moq. subsp. zschackei
             Chenopodium berlandieri Moq. var. farinosum Ludw. ex Aellen
             Chenopodium platyphyllum Issler
             Chenopodium zshcackei Murr
    Chenopodium capitatum (L.) Ambrosi var. capitatum *+
        blite goosefoot, Indian ink, Indian-paint, strawberry-blite,
             Blitum capitatum L.
    Chenopodium foliosum (Moench) Asch.+
        leafy goosefoot
             Morocarpus foliosus Moench
    Chenopodium glaucum L. var. glaucum *+
             Chenopodium glaucum L. subsp. euglaucum
    Chenopodium polyspermum L. var. acutifolium (Sm.) Gaudin+
        many-seed goosefoot
    Chenopodium pratericola Rydb.+
        desert goosefoot, narrow-leaf goosefoot
             Chenopodium desiccatum A.Nelson var. leptophylloides (Murr) Wahl
             Chenopodium leptophyllum Nutt. ex S.Watson, sensu Swink & Wilhelm (1994)
             Chenopodium petiolare Kunth var. leptophylloides Murr
             Chenopodium pratericola Rydb. subsp. eupratericola
             Chenopodium pratericola Rydb. var. leptophylloides (Murr) Aellen
             Chenopodium subglabrum (S.Watson) A.Nelson, sensu Voss (1985)
    Chenopodium simplex (Torr.) Raf.*+
        maple-leaved goosefoot
             Chenopodium gigantospermum Aellen
             Chenopodium hybridum auct. non L.
             Chenopodium hybridum L. subsp. gigantospermum
             Chenopodium hybridum L. var. gigantospermum (Aellen) Rouleau
             Chenopodium hybridum L. var. simplex Torr.
    Chenopodium standleyanum Aellen+
        Standley's goosefoot, woodland goosefoot
             Chenopodium boscianum Moq., misapplied
             Chenopodium gigantospermum Aellen var. standleyanum (Aellen) Aellen
             Chenopodium hybridum L. var. standleyanum (Aellen) Fernald
    Chenopodium strictum Roth+
        late-flowering goosefoot
             Chenopodium glaucophyllum Aellen
             Chenopodium strictum Roth subsp. glaucophyllum
             Chenopodium strictum Roth subsp. strictum
             Chenopodium strictum Roth var. glaucophyllum (Aellen) Wahl
             Chenopodium strictum Roth var. strictum
    Chenopodium urbicum L.+
        city goosefoot
             Chenopodium urbicum L. var. intermedium (Mert. & W.D.J.Koch) W.D.J.Koch
  Genus: Cycloloma

    Cycloloma atriplicifolium (Spreng.) J.M.Coult.*+
        winged pigweed
             Cyclolepis platyphylla (Michx.) Moq.
             Cycloloma platyphyllum (Michx.) Moq.
             Kochia atriplicifolia (Spreng.) Roth
             Salsola atriplicifolia Spreng.
             Salsola platyphylla Michx.
  Genus: Dysphania

    Dysphania botrys (L.) Mosyakin & Clemants+
        feather-geranium, Jerusalem-oak, Jerusalem-oak, goosefoot
             Botrydium botrys (L.) Small
             Chenopodium botrys L.
             Teloxys botrys (L.) W.A.Weber
  Genus: Kochia

    Kochia scoparia (L.) Schrad. subsp. scoparia*+
        burning bush, common kockia, Mexican fireweed, summer-cypress
  Genus: Salsola

    Salsola tragus L.*+
        prickly Russian thistle, Russian thistle, tumbleweed
             Salsola australis R.Br.
             Salsola iberica (Sennen & Pau) Botsch. ex Czerep.
             Salsola kali L. subsp. ruthenica
             Salsola kali L. subsp. tragus
             Salsola kali L. var. tenuifolia Tausch ex Moq.
             Salsola pestifer A.Nelson
             Salsola ruthenica Iljin
Family: Cistaceae
  Genus: Helianthemum

    Helianthemum bicknellii Fernald*+
        Bicknell's rock-rose, hoary frostweed, rock-rose
             Crocanthemum bicknellii (Fernald) Barnhart
             Crocanthemum majus sensu Britton
    Helianthemum canadense (L.) Michx.*+
        common rock-rose, long-branch frostweed
             Cistus canadensis L.
             Crocanthemum canadense (L.) Britton
             Helianthemum canadense (L.) Michx. var. sabulonum Fernald
  Genus: Hudsonia

    Hudsonia tomentosa Nutt. var. tomentosa *+
        false heather, woolly beach-heather
  Genus: Lechea

    Lechea intermedia Legg. ex Britton var. intermedia *+
        intermediate pinweed, large-pod pinweed
             Lechea intermedia Legg. ex Britton var. typica Hodgdon
    Lechea stricta Legg. ex Britton*+
        bushy pinweed, prairie pinweed
    Lechea tenuifolia Michx.+
        narrow-leaved pinweed, slender-leaved pinweed
             Lechea tenuifolia Michx. var. occidentalis Hodgdon
Family: Commelinaceae
  Genus: Commelina

    Commelina communis L.*+
        Asiatic dayflower, common dayflower
             Commelina communis L. var. communis
             Commelina communis L. var. ludens (Miq.) C.B.Clake
             Commelina debilis Ledeb.
             Commelina ludens Miq.
  Genus: Tradescantia

    Tradescantia bracteata Small*+
        bracted spiderwort, long-bracted spiderwort, sticky spiderwort
    Tradescantia ohiensis Raf.*+
        blue-jacket, common spiderwort, smooth spiderwort
             Tradescantia canaliculata Raf.
             Tradescantia foliosa Small
             Tradescantia incarnata Small
             Tradescantia ohiensis Raf. var. foliosa (Small) MacRoberts
             Tradescantia reflexa Raf.
             Tradescantia reflexa Raf. f. albiflora Slavin & Nieuwl.
             Tradescantia reflexa Raf. f. lesteri Standl.
Family: Convolvulaceae
  Genus: Calystegia

    Calystegia sepium (L.) R.Br.*+
        hedge bindweed, hedge false bindweed
             Calystegia sepium (L.) R.Br. subsp. americana
             Calystegia sepium (L.) R.Br. subsp. angulata
             Calystegia sepium (L.) R.Br. subsp. sepium
             Calystegia sepium (L.) R.Br. var. angulata (Brummitt) N.H.Holmgren
             Calystegia sepium (L.) Pursh var. pubescens A.Gray
             Calystegia sepium (L.) R.Br. var. repens (L.) A.Gray
             Convolvulus nashii House
             Convolvulus repens L.
             Convolvulus sepium L.
             Convolvulus sepium L. var. americanus Sims
             Convolvulus sepium L. var. communis R.M.Tryon
             Convolvulus sepium L. var. repens (L.) A.Gray
             Convolvulus sepium L. var. sepium
    Calystegia spithamaea (L.) Pursh*+
        low bindweed, low false bindweed
             Calystegia spithamaea (L.) Pursh subsp. spithamaea
             Calystegia spithamaea (L.) Pursh subsp. stans
             Convolvulus sepium L. var. pubescens (A.Gray) Fernald
             Convolvulus spithamaeus L.
             Convolvulus spithamaeus L. subsp. spithamaeus
             Convolvulus spithamaeus L. subsp. stans
             Convolvulus spithamaeus L. var. pubescens (A.Gray) Fernald
             Convolvulus spithamaeus L. var. stans (Michx.) Fogelberg
             Convolvulus stans Michx.
  Genus: Convolvulus

    Convolvulus arvensis L.*+
        field bindweed
             Convolvulus ambigens House
             Convolvulus arvensis L. var. obtusifolius Choisy
             Convolvulus incanus auct. non Vahl
             Strophocaulos arvensis (L.) Small
  Genus: Ipomoea

    Ipomoea purpurea (L.) Roth*+
        common morning-glory, tall morning-glory
             Convolvulus purpureus L.
             Ipomoea diversifolia Lindl.
             Ipomoea hirsutula J.Jacq.
             Ipomoea purpurea (L.) Roth var. diversifolia (Lindl.) O'Donell
             Pharbitis purpurea (L.) Voigt
Family: Cornaceae
  Genus: Cornus

    Cornus alternifolia L.f.*+
        alternate-leaved dogwood, pagoda dogwood
             Swida alternifolia (L.f.) Small
    Cornus amomum Mill. var. schuetzeana (C.A.Mey.) Rickett*+
        blue-fruited dogwood, silky dogwood
             Cornus amomum Mill. subsp. obliqua
             Cornus obliqua Raf.
             Cornus purpusii Koehne
             Cornus sericea L. var. schuetzeana C.A.Mey.
    Cornus canadensis L.*+
        bunchberry, bunchberry dogwood, dwarf cornel
             Chamaepericlymenum canadense (L.) Asch. & Graebn.
             Cornella canadensis (L.) Rydb.
             Cornus canadensis L. f. dutillyi Lepage
             Cornus canadensis L. f. elongata M.Peck
             Cornus canadensis L. var. dutillyi (Lepage) B.Boivin
             Cornus canadensis L. var. intermedia Farr
    Cornus drummondii C.A.Mey.
        northern roughleaf dogwood, rough-leaved dogwood
             Cornus priceae Small
             Swida priceae (Small) Small
    Cornus racemosa Lam.*+
        gray dogwood, northern swamp dogwood, panicled dogwood
             Cornus candidissima Marshall, non Mill.
             Cornus foemina Mill., sensu Drescher (1933)
             Cornus foemina Mill. subsp. racemosa
             Cornus paniculata L'Hér.
             Swida racemosa (Lam.) Moldenke
    Cornus rugosa Lam.*+
        round-leaved dogwood
             Cornus circinata L'Hér.
             Swida rugosa (Lam.) Rydb.
    Cornus stolonifera Michx.*+
        red osier dogwood
             Cornus alba L., pro parte
             Cornus alba L. subsp. stolonifera
             Cornus alba L. var. baileyi (J.M.Coult. & W.H.Evans) B.Boivin
             Cornus alba L. var. californica (C.A.Mey.) B.Boivin
             Cornus alba L. var. interior (Rydb.) B.Boivin
             Cornus baileyi J.M.Coult. & W.H.Evans
             Cornus interior (Rydb.) N.Petersen
             Cornus instolonea A.Nelson
             Cornus sericea L.
             Cornus sericea L. subsp. sericea
             Cornus sericea L. subsp. stolonifera
             Cornus sericea L. var. interior (Rydb.) H.St.John
             Cornus stolonifera Michx. var. baileyi (J.M.Coult. & W.H.Evans) Drescher
             Cornus stolonifera Michx. var. interior (Rydb.) H.St.John
             Cornus X californica C.A.Mey. X
             Swida baileyi (J.M.Coult. & W.H.Evans) Rydb.
             Swida interior Rydb.
             Swida instolonea (A.Nelson) Rydb.
             Swida stolonifera (Michx.) Rydb.
Family: Crassulaceae
  Genus: Sedum

    Sedum acre L.*+
        gold-moss stonecrop, wall-pepper, yellow sedum
    Sedum sarmentosum Bunge*+
        stringy stonecrop
    Sedum spectabile Boreau*+
        showy stonecrop
             Hylotelephium spectabile (Boreau) H.Ohba
    Sedum telephium L. subsp. telephium*+
        live-forever, witch's-moneybags
             Hylotelephium telephium (L.) H.Ohba subsp. telephium
             Sedum purpureum (L.) Schult.
             Sedum telephium L. subsp. purpureum
             Sedum telephium L. var. purpureum L.
             Sedum triphyllum (Haw.) S.F.Gray
Family: Cucurbitaceae
  Genus: Citrullus

    Citrullus lanatus (Thunb.) Mansf. var. lanatus *+
        watermelon
             Citrullus vulgaris Schrad.
  Genus: Cucumis

    Cucumis melo L.*+
        cantaloupe, melon, muskmelon
  Genus: Cucurbita

    Cucurbita foetidissima Kunth+
        buffalo gourd, Missouri gourd, wild pumpkin
             Pepo foetidissima (Kunth) Britton
  Genus: Echinocystis

    Echinocystis lobata (Michx.) Torr. & A.Gray*+
        balsam-apple, wild-cucumber
             Micrampelis lobata (Michx.) Greene
             Sicyos lobata Michx.
  Genus: Sicyos

    Sicyos angulatus L.*+
        bur-cucumber
Family: Cupressaceae
  Genus: Juniperus

    Juniperus communis L. var. depressa Pursh*+
        common juniper
             Juniperus canadensis Lodd. ex Burgsd.
             Juniperus communis L. subsp. depressa
             Juniperus depressa (Pursh) Raf.
    Juniperus horizontalis Moench*+
        creeping juniper, trailing juniper
             Juniperus horizontalis Moench var. douglasii hort.
             Juniperus horizontalis Moench var. variegata Beissn.
             Juniperus hudsonica Forbes
             Juniperus prostrata Pers.
             Juniperus repens Nutt.
             Juniperus virginiana L. var. prostrata (Pers.) Torr.
             Sabina horizontalis (Moench) Antoine
             Sabina prostrata (Pers.) Antoine
    Juniperus horizontalis Moench var. X J. virginiana L. var. virginiana+
             Juniperus virginiana L. var. ambigens Fassett (pro var.)
    Juniperus virginiana L. var. virginiana *+
        eastern red-cedar
             Juniperus virginiana L. subsp. crebra
             Juniperus virginiana L. var. crebra Fernald & Griscom
             Sabina virginiana (L.) Antoine
  Genus: Thuja

    Thuja occidentalis L.*+
        eastern arborvitae, northern white-cedar
Family: Cuscutaceae
  Genus: Cuscuta

    Cuscuta cephalanthi Engelm.+
        buttonbush dodder
             Grammica cephalanthi (Engelm.) Hadac & Chrtek
    Cuscuta coryli Engelm.+
        hazel dodder
             Grammica coryli (Engelm.) Hadac & Chrtek
    Cuscuta glomerata Choisy*+
        rope dodder
    Cuscuta gronovii Willd. ex Roem. & Schult. var. gronovii *+
        common dodder, love dodder, scald-weed, swamp dodder
             Cuscuta gronovii Willd. ex Roem. & Schult. var. latiflora Engelm.
             Cuscuta gronovii Willd. ex Roem. & Schult. var. saururi (Engelm.) MacMill.
             Cuscuta umbrosa auct. non Beyr. ex Hook.
             Grammica gronovii (Willd. ex Roem. & Schult) Hadac & Chrtek
             Grammica umbrosa auct. non (Beyr. ex Hook.) W.A.Weber
    Cuscuta polygonorum Engelm.+
        knotweed dodder, smartweed dodder
Family: Cyperaceae
  Genus: Bolboschoenus

    Bolboschoenus fluviatilis (Torr.) Soják*+
        river bulrush
             Schoenoplectus fluviatilis (Torr.) M.T.Strong
             Scirpus fluviatilis (Torr.) A.Gray
             Scirpus maritimus L. var. fluviatilis Torr.
  Genus: Bulbostylis

    Bulbostylis capillaris (L.) Kunth ex C.B.Clarke*+
        hair sedge, thread-leaved beak-seed
             Bulbostylis capillaris (L.) Kunth ex C.B.Clarke subsp. capillaris
             Bulbostylis capillaris (L.) Kunth ex C.B.Clarke var. crebra Fernald
             Bulbostylis capillaris (L.) Kunth ex C.B.Clarke var. isopoda Fernald
             Fimbristylis capillaris (L.) A.Gray
             Isolepis brachyphylla (Link) Schult.
             Isolepis capillaris (L.) Roem. & Schult.
             Isolepis radiciflora Steud.
             Scirpus brachyiphyllus Link
             Scirpus capillaris L.
             Scirpus muhlenbergii Spreng.
             Stenophyllus capillaris (L.) Britton
  Genus: Carex

    Carex albursina E.Sheld.*+
        blunt-scaled wood sedge, white bear sedge
             Carex laxiflora Lam. var. latifolia Boott
    Carex alopecoidea Tuck.*+
        brown-headed fox sedge, foxtail sedge
    Carex annectens (E.P.Bicknell) E.P.Bicknell
        yellow-headed fox sedge
             Carex bicknelii Camus, 1910, non Britton 1896
    Carex aquatilis Wahlenb.
        long-bracted tussock sedge, water sedge
    Carex aquatilis Wahlenb. var. aquatilis *+
        long-bracted tussock sedge, water sedge
             Carex acutinella Mack.
             Carex aquatilis Wahlenb. subsp. altior
             Carex aquatilis Wahlenb. var. altior (Rydb.) Fernald
             Carex interimus Maguire
             Carex pachystoma T.Holm
             Carex suksdorfii Kük.
             Carex variabilis L.H.Bailey
    Carex arctata Boott*+
        drooping woodland sedge
             Carex arctata Boott var. faxonii L.H.Bailey
    Carex atherodes Spreng.*+
        hairy-leaved lake sedge, slough sedge
    Carex aurea Nutt.*+
        elk sedge, golden sedge, golden-fruited sedge
    Carex backii W.Boott*+
        Back's sedge, Rocky Mountain sedge
             Carex durifolia L.H.Bailey
    Carex bebbii (L.H.Bailey) Olney ex Fernald*+
        Bebb's oval sedge, Bebb's sedge
             Carex tribuloides Wahlenb. var. bebbii L.H.Bailey
    Carex bicknellii Britton*+
        Bicknell's oval sedge, Bicknell's sedge
             Carex bicknellii Britton var. bicknellii
    Carex blanda Dewey*+
        common wood sedge, eastern woodland sedge, wood sedge
             Carex blanda Dewey var. blanda
             Carex laxiflora Lam. var. blanda (Dewey) Boott
    Carex brevior (Dewey) Mack. ex Lunell*+
        fescue sedge, plains oval sedge
             Carex festucacea Schkuhr ex Willd. var. brevior (Dewey) Fernald
             Carex straminea Willd. ex Schkuhr var. brevior Dewey
    Carex bromoides Schkuhr ex Willd. subsp. bromoides*+
        brome-like sedge
             Carex bromoides Schkuhr ex Willd. var. bromoides
    Carex buxbaumii Wahlenb.*+
        Buxbaum's sedge
             Carex buxbaumii Wahlenb. f. heterostachya Andersson
             Carex buxbaumii Wahlenb. var. anticostensis Raymond
             Carex holmiana Mack.
             Carex polygama Schkuhr
    Carex canescens L.*+
        gray bog sedge, silvery sedge
    Carex cephalophora Muhl. ex Willd.*+
        oval-headed sedge, short-headed bracted sedge, wood-bank sedge
    Carex cephaloidea (Dewey) Dewey*+
        clustered bracted sedge
             Carex muricata L. var. cephaloidea Dewey
             Carex sparganioides Muhl. ex Willd. var. cephaloidea (Dewey) J.Carey
    Carex chordorrhiza Ehrh. ex L.f.*+
        cord-root sedge, creeping sedge
    Carex comosa Boott*+
        bristly sedge
    Carex communis L.H.Bailey var. communis *+
        Colonial oak sedge, fibrous-root sedge
    Carex conoidea Willd.*+
        open-field sedge, prairie gray sedge
             Carex katahdinensis Fernald
    Carex crawfordii Fernald*+
        Crawford's oval sedge, Crawford's sedge
             Carex crawfordii Fernald var. vigens Fernald
    Carex cristatella Britton*+
        crested oval sedge, crested sedge
             Carex cristatella Britton f. catelliformis (Farw.) Fernald
             Carex cristata Schwein.
    Carex cryptolepis Mack.*+
        northeastern sedge, small yellow sedge
             Carex flava L. var. fertilis auct. non Peck
    Carex davisii Schwein. & Torr.*+
        awned graceful sedge, Davis' sedge
    Carex debilis Michx. var. rudgei L.H.Bailey*+
        northern weak sedge, weak sedge, white-edge sedge
             Carex allegheniensis Mack.
             Carex debilis Michx. var. intercursa Fernald
             Carex debilis Michx. var. interjecta L.H.Bailey
             Carex debilis Michx. var. puberua A.Gray
             Carex debilis Michx. var. strictior L.H.Bailey
             Carex flexuosa Muhl. ex Willd.
             Carex tenuis Rudge
    Carex deweyana Schwein. var. deweyana *+
        Dewey's sedge
             Carex deweyana Schwein. subsp. deweyana
    Carex diandra Schrank*+
        bog panicled sedge, lesser panicled sedge
    Carex disperma Dewey*+
        soft-leaf sedge, two-seeded bog sedge
             Carex tenella Schkuhr
    Carex eburnea Boott*+
        bristle-leaf sedge
    Carex echinodes (Fernald) P.Rothr., Reznicek & Hipp.*+
        marsh straw sedge, quill sedge
             Carex straminea Willd. ex Schkuhr var. echinodes Fernald
             Carex tenera Dewey var. echinodes (Fernald) Wiegand
    Carex echinata Murray subsp. echinata*+
        large-fruited star sedge, prickly sedge, star sedge
             Carex angustior Mack.
             Carex angustior Mack. var. gracilenta R.T.Clausen & Wahl
             Carex cephalantha (L.H.Bailey) E.P.Bicknell
             Carex echinata Murray var. angustata (J.Carey) L.H.Bailey
             Carex echinata Murray var. echinata
             Carex hawaiiensis H.St.John
             Carex josselynii (Fernald) Mack. ex Pease
             Carex leersii Willd.
             Carex muricata L. var. angustata (J.Carey) J.Carey ex Gleason
             Carex muricata L. var. cephalantha (L.H.Bailey) Wiegand & Eames
             Carex ormantha (Fernald) Mack.
             Carex phyllomanica W.Boott var. angustata (J.Carey) B.Boivin
             Carex phyllomanica W.Boott var. ormantha (Fernald) B.Boivin
             Carex svensonis Skottsb.
    Carex emoryi Dewey ex Torr.+
        Emory's sedge
             Carex millegrana T.Holm
             Carex stricta Lam. var. elongata (Boeck.) Gleason
             Carex stricta Lam. var. emoryi (Dewey) L.H.Bailey
             Caex variabilis L.H.Bailey var. elatior L.H.Bailey
             Caex virginiana Woods var. elongata Boeck.
    Carex gracillima Schwein.*+
        graceful sedge, purple-sheathed graceful sedge
             Carex gracillima Schwein. var. macerrima Fernald & Wiegand
    Carex granularis Muhl. ex Willd.*+
        limestone meadow sedge
             Carex granularis Muhl. ex Willd. var. granularis
             Carex granularis Muhl. ex Willd. var. haleana (Olney) Porter
             Carex haleana Olney
             Carex rectior Mack.
             Carex shriveri Britton
    Carex gravida L.H.Bailey*+
        heavy sedge, long-awned bracted sedge
             Carex gravida L.H.Bailey var. gravida
             Carex lunelliana Mack.
    Carex grayi J.Carey*+
        bur sedge, Gray's bur sedge, Gray's sedge
             Carex asa-grayi L.H.Bailey
             Carex grayi J.Carey var. hispidula A.Gray
             Carex intumescens Rudge var. globularis A.Gray
    Carex grisea Wahlenb.*+
        eastern narrow-leaved sedge, gray sedge
             Carex amphibola auct. mult.
             Carex amphibola Steud. var. turgida Fernald
    Carex gynandra Schwein.*+
        nodding sedge
             Carex crinita Lam. var. gynandra (Schwein.) Schwein. & Torr.
             Carex crinita Lam. var. simulans Fernald
             Carex gynandra Schwein. var. simulans (Fernald) Roll.-Germ.
    Carex haydenii Dewey*+
        Hayden's sedge, long-scaled tussock sedge
             Carex acuta L. var. erecta Dewey
             Carex rousseaui Raymond
             Carex stricta Lam. var. decora L.H.Bailey
             Carex stricta Lam. var. haydenii (Dewey) Kük.
    Carex hirtifolia Mack.*+
        hairy sedge, hairy wood sedge, pubescent sedge
    Carex hitchcockiana Dewey*+
        hairy wood sedge, Hitchcock's sedge
    Carex hystericina Muhl. ex Willd.*+
        bottlebrush sedge, porcupine sedge
             Carex hystricina Muhl. ex Willd. [orthographic "correction"]
    Carex interior L.H.Bailey*+
        inland sedge, inland star sedge
             Carex interior L.H.Bailey f. keweenawensis (F.J.Herm.) Fernald
             Carex interior L.H.Bailey subsp. charlestonensis
             Carex interior L.H.Bailey var. keweenawensis F.J.Herm.
             Carex scirpoides Sckuhr ex Willd., 1805, non Michx., 1803
    Carex intumescens Rudge*+
        greater bladder sedge, shining bur sedge, swollen sedge
             Carex intumescens Rudge var. fernaldii L.H.Bailey
             Carex intumescens Rudge var. intumescens
    Carex jamesii Schwein.*+
        grass sedge, James' sedge
             Carex steudelii Kunth
    Carex lacustris Willd.*+
        common lake sedge, rip-gut sedge
             Carex riparia M.A.Curtis var. lacustris (Willd.) Kük.
    Carex laeviconica Dewey*+
        long-toothed lake sedge, smooth-cone sedge
    Carex laevivaginata (Kük.) Mack.*+
        smooth-sheathed fox sedge, smooth-sheathed sedge
             Carex stipata Muhl. ex Willd. var. laevivaginata Kük.
    Carex lasiocarpa Ehrh. subsp. americana*+
        American woolly-fruit sedge, narrow-leaved woolly sedge, woolly-fruit sedge
             Carex filiformis auct. non L.
             Carex lanuginosa Michx. var. americana (Fernald) B.Boivin
             Carex lasiocarpa Ehrh. var. americana Fernald
    Carex leavenworthii Dewey*+
        Leavenworth's bracted sedge, Leavenworth's sedge
             Carex cephalophora Muhl. ex Willd. var. angustifolia Boott
             Carex cephalophora Muhl. ex Willd. var. leavenworthii (Dewey) Kük.
    Carex leptalea Wahlenb. subsp. leptalea*+
        bristle-stalked sedge, slender sedge
    Carex limosa L.*+
        muck sedge, mud sedge
             Carex limosa L. var. irrigua Wahlenb.
    Carex lupulina Willd.*+
        common hop sedge, hop sedge
             Carex lupulina Willd. var. pedunculata A.Gray
             Carex X macounii Dewey X
    Carex meadii Dewey*+
        Mead's sedge, Mead's stiff sedge
             Carex tetanica Schkuhr var. meadii (Dewey) L.H.Bailey
    Carex molesta Mack. ex Bright*+
        field oval sedge, troublesome sedge
    Carex muhlenbergii Schkuhr ex Willd. var. enervis Boott+
        Muhlenberg's bracted sedge, Muhlenberg's sedge, sand bracted sedge, sand sedge
             Carex onusta Mack.
             Carex plana Mack.
    Carex muhlenbergii Schkuhr ex Willd. var. muhlenbergii +
        Muhlenberg's bracted sedge, Muhlenberg's sedge, sand bracted sedge, sand sedge
    Carex muskingumensis Schwein.*+
        Muskingum sedge, swamp oval sedge
    Carex normalis Mack.*+
        greater straw sedge, intermediate sedge, spreading oval sedge
             Carex mirabilis Dewey
    Carex oligocarpa Willd.*+
        few-fruited gray sedge, rich-woods sedge
    Carex peckii Howe*+
        Peck's oak sedge, Peck's sedge
             Carex albicans auct. non Willd.
             Carex clivicola Fernald & Weath.
             Carex nigromarginata Schwein. var. elliptica (Boott) Gleason
             Carex nigromarginata Schwein. var. minor (Boott) Gleason
    Carex pedunculata Muhl. ex Willd.*+
        long-stalk sedge
    Carex pellita Willd.*+
        broad-leaved woolly sedge
             Carex lanuginosa auct. non Michx.
             Carex lasiocarpa Ehrh. var. latifolia (Boeck.) Gilly
    Carex pensylvanica Lam.*+
        common oak sedge, Pennsylvania sedge
             Carex marginata Willd.
             Carex pensylvanica Lam. var. glumabunda Peck
             Carex pensylvanica Lam. var. marginata (Willd.) Dewey
             Carex pensylvanica Lam. var. pensylvanica
             Carex stolonifera Schwein.
    Carex praegracilis W.Boott*+
        clustered field sedge, freeway sedge
             Carex camporum Mack.
    Carex prairea Dewey*+
        fen panicled sedge, prairie sedge
             Carex diandra Schrank var. ramosa (Boott) Fernald
    Carex projecta Mack.*+
        loose-headed oval sedge, necklace sedge
    Carex pseudocyperus L.*+
        cypress-like sedge, false bristly sedge
    Carex radiata (Wahlenb.) Small*+
        eastern star sedge, straight-styled wood sedge
             Carex rosea Schkuhr ex Willd., misapplied
             Carex rosea Schkuhr ex Willd. var. radiata (Wahlenb.) Dewey
             Carex stellulata Gooden. var. radiata Wahlenb.
    Carex retrorsa Schwein.*+
        deflexed bottlebrush sedge, knot-sheath sedge, retrorse sedge
    Carex richardsonii R.Br.*+
        prairie hummock sedge, Richardson's sedge
    Carex rosea Schkuhr ex Willd.*+
        curly-styled wood sedge, rosy sedge, stellate sedge
             Carex convoluta Mack.
             Carex flaccidula Steud.
             Carex rosea Schkuhr ex Willd. var. pusilla Peck & Howe
    Carex sartwellii Dewey*+
        running marsh sedge, Sartwell's sedge
    Carex scoparia Schkuhr ex Willd. var. scoparia *+
        broom sedge, lance-fruited oval sedge
    Carex siccata Dewey*+
        dry-spiked sedge, hay sedge, hillside sedge, running savanna sedge
             Carex foenea Willd., misapplied
    Carex sparganioides Muhl. ex Willd.*+
        bur-reed sedge, loose-headed bracted sedge
             Carex sparganioides Muhl. ex Willd. var. sparganioides
    Carex sprengelii Dewey ex Spreng.*+
        long-beaked sedge, Sprengel's sedge
             Carex longirostris Torr., non Krock.
    Carex sterilis Willd.*+
        dioecious sedge, fen star sedge
             Carex elachycarpa Fernald
             Carex muricata L. var. sterilis (Willd.) Gleason
             Carex X minganinsularum Raymond X
             Kobresia elachycarpa (Fernald) Fernald
    Carex stipata Muhl. ex Willd. var. stipata *+
        common fox sedge, owl-fruit sedge
             Carex stipata Muhl. ex Willd. var. crassicurta Peck
             Carex stipata Muhl. ex Willd. var. subsecuta Peck
    Carex stricta Lam.*+
        common tussock sedge, hummock sedge, tussock sedge, uptight sedge
             Carex stricta Lam. var. curtissima Peck
             Carex stricta Lam. var. strictior (Dewey) J.Carey
             Carex stricta Lam. var. stricta
             Carex stricta Lam. var. xerocarpa (S.H.Wright) Britton
             Carex strictior Dewey
             Carex xerocarpa S.H.Wright
    Carex sychnocephala J.Carey*+
        many-headed oval sedge, many-headed sedge
    Carex tenera Dewey*+
        marsh straw sedge, narrow-leaved oval sedge, quill sedge
             Carex straminea Willd. ex Schkuhr var. tenera (Dewey) Barratt
             Carex tenera Dewey var. tenera
    Carex tetanica Schkuhr*+
        common stiff sedge, rigid sedge
    Carex tonsa (Fernald) E.P.Bicknell var. tonsa +
        shaved sedge, smooth-fruited oak sedge
             Carex rugosperma Mack. var. tonsa (Fernald) E.G.Voss
             Carex umbellata Schkuhr ex Willd. var. tonsa Fernald
    Carex trichocarpa Willd.*+
        hairy-fruit lake sedge, hairy-fruit sedge
    Carex trisperma Dewey*+
        three-fruited sedge, three-seeded bog sedge, three-seeded sedge
             Carex trisperma Dewey var. billingsii O.W.Knight
             Carex trisperma Dewey var. trisperma
    Carex tribuloides Wahlenb. var. tribuloides *+
        awl-fruited oval sedge, blunt-broom sedge
    Carex tuckermanii Dewey*+
        bent-seeded hop sedge, Tuckerman's sedge
    Carex typhina Michx.*+
        cat-tail sedge
             Carex squarrosa L. var. typhina (Michx.) Nutt.
             Carex typhinoides Schwein.
    Carex umbellata Schkuhr ex Willd.*+
        early oak sedge, hidden sedge, parasol sedge
             Carex abdita E.B.Bicknell
             Carex microrhyncha Mack.
             Carex umbellata Schkuhr var. umbellata
    Carex utriculata Boott*+
        common yellow lake sedge, Northwest Territory sedge
             Carex inflata Huds. var. utriculata (Boott) Druce
             Carex laevirostris (Blytt ex Fr.) Fr.
             Carex rhynchosphysa Fisch., C.A.Mey. & Avé-Lall.
             Carex rostrata Stokes var. utriculata (Boott) L.H.Bailey
    Carex vesicaria L.*+
        blister sedge, tufted lake sedge
             Carex monile Tuck.
             Carex vesicaria L. var. distenta Fr.
             Carex vesicaria L. var. jejuna Fernald
             Carex vesicaria L. var. monile (Tuck.) Fernald
             Carex vesicaria L. var. vesicaria
    Carex viridula Michx. subsp. viridula*+
        green yellow sedge, little green sedge
             Carex chlorocarpa Mack.
             Carex irregularis Schwein.
             Carex oederi Ehrh., non Retz.
             Carex oederi Retz. subsp. viridula
             Carex oederi Retz. var. recterostrata (Vict.) Dorn
             Carex oederi Retz. var. viridula (Michx.) Kük.
             Carex pulchella (Lönn.) Lindm.
             Carex scandinavica E.W.Davies
             Carex serotina Mérat
             Carex subglobosa Miel.
             Carex viridula Michx. var. pumila (Coss. & Germ.) Fernald
    Carex vulpinoidea Michx.*+
        brown fox sedge, fox sedge
             Carex microsperma Wahlenb.
             Carex multiflora Willd.
             Carex multiflora Willd. var. microsperma (Wahlenb.) Dewey
             Carex scabior Dewey
             Carex setacea Dewey
             Carex vulpinoidea Michx. var. microsperma (Wahlenb.) Dewey
             Carex vulpinoidea Michx. var. pycnocephala F.J.Herm.
             Carex vulpinoidea Michx. var. scabrior (Dewey) A.W.Wood
             Carex vulpinoidea Michx. var. segregata Farw.
             Carex vulpinoidea Michx. var. setacea (Dewey) Kük.
  Genus: Cyperus

    Cyperus bipartitus Torr.*+
        shining flat sedge, slender flat sedge
             Cyperus niger Ruiz & Pav. var. rivularis (Kunth) V.E.Grant
             Cyperus rivularis Kunth
             Pycreus rivularis (Kunth) Palla
    Cyperus diandrus Torr.*+
        low cyperus, umbrella flat sedge
             Pycreus diander (Torr.) C.B.Clarke
    Cyperus erythrorhizos Muhl.*+
        red-rooted sedge
             Cyperus cupreus J.Presl & C.Presl
             Cyperus erythrorhizos Muhl. var. cupreus (J.Presl & C.Presl) Kük.
             Cyperus halei Torr. ex Britton
             Cyperus occidentalis Torr.
             Cyperus washingtonensis Gand.
    Cyperus esculentus L. var. leptostachyus Boeck.
        field nut sedge, flat sedge, yellow nut sedge
             Chlorocyperus phymatodes (Muhl.) Palla
             Cyperus esculentus L. f. angustispicatus (Britton) Fernald
             Cyperus esculentus L. var. angustispicatus Britton
             Cyperus esculentus L. var. phymatodes (Muhl.) Kük.
             Cyperus fulvescens Liebm.
             Cyperus phymatodes Muhl.
             Cyperus repens Elliott
             Cyperus tuberosus Pursh
    Cyperus houghtonii Torr.*+
        Houghton's flat sedge
    Cyperus lupulinus (Spreng.) Marcks+
        Great Plains flat sedge, sand cyperus, sand sedge
    Cyperus lupulinus (Spreng.) Marcks subsp. lupulinus+
        Great Plains flat sedge, sand cyperus, sand sedge
             Cyperus bushii Britton
             Cyperus filiculmis auct. non Vahl
             Cyperus houghtonii Torr. var. bushii (Britton) Kük.
             Scirpus cyperiformis Muhl.
             Scirpus lupulinus Spreng.
    Cyperus lupulinus (Spreng.) Marcks subsp. macilentus*+
        Great Plains flat sedge, sand cyperus, slender sand sedge
             Cyperus filiculmis Vahl var. macilentus Fernald
             Cyperus macilentus (Fernald) E.P.Bicknell
             Mariscus filiculmis (Vahl) T.Koyama
    Cyperus odoratus L.+
        flat sedge, fragrant cyperus, rusty flat sedge
             Cyperus acicularis (Nees) Steud.
             Cyperus californicus S.Watson
             Cyperus eggersii Boeck.
             Cyperus engelmannii Steud.
             Cyperus ferax Rich.
             Cyperus ferruginescens Boeck.
             Cyperus ferax Rich. subsp. engelmanii
             Cyperus ferax Rich. subsp. speciosus
             Cyperus ferax Rich. var. speciosus (Britton) Kük.
             Cyperus haenkei J.Presl & C.Presl
             Cyperus huarmensis (Kunth) M.C.Johnst.
             Cyperus longispicatus Norton
             Cyperus macrocephalus Liebm.
             Cyperus michauxianus Schult.
             Cyperus odoratus L. var. acicularis (Schrad. ex Nees) O'Neill
             Cyperus odoratus L. var. engelmannii (Steud.) J.Rich.Carter, S.D.Jones & J.K.Wipff
             Cyperus odoratus L. var. squarrosus (Britton) Gilly
             Cyperus oxycarioides Britton
             Cyperus speciosus Vahl
             Cyperus speciosus Vahl var. ferruginescens (Boeck.) Britton
             Cyperus speciosus Vahl var. squarrosus Britton
             Cyperus squarrosus L. var. parvus Britton
             Diclidium aciculare Schrad. ex Nees
             Diclidium odoratum (L.) Schrad. ex Nees
             Mariscus ferax (Rich.) C.B.Clarke
             Mariscus huarmensis Kunth
             Torulinium confertum Desv. ex Ham.
             Torulinium eggersii (Boeck.) C.B.Clarke
             Torulinium ferax (Rich.) Urb.
             Torulinium macrocephalum (Liebm.) T.Koyama
             Torulinium michauxianum (Schult.) C.B.Clarke
             Torulinium odoratum (L.) S.S.Hooper
    Cyperus schweinitzii Torr.*+
        Great Plains sand sedge, Schweinitz's cyperus, Schweinitz's flat sedge
             Cyperus alterniflorus Schwein., 1824 non R.Br., 1810
             Cyperus schweinitzii Torr. var. uberior Kük.
             Mariscus schweinitzii (Torr.) T.Koyama
    Cyperus squarrosus L.*+
        bearded flat sedge
             Chlorocyperus inflexus (Muhl.) Palla
             Cyperus aristatus Rottb.
             Cyperus aristatus Rottb. var. inflexus (Muhl.) Kük.
             Cyperus aristatus Rottb. var. runyonii O'Neill
             Cyperus inflexus Muhl.
             Dichostylis aristata (Rottb.) Palla
             Mariscus squarrosus (L.) C.B.Clarke
    Cyperus strigosus L.*+
        false nut sedge, straw-colored cyperus
             Cyperus hansenii Britton
             Cyperus stenolepis Torr.
             Cyperus strigosus L. f. robustior Kunth
             Cyperus strigosus L. var. capitatus Boeck.
             Cyperus strigosus L. var. hansenii (Britton) Kük.
             Cyperus strigosus L. var. multiflorus Geise
             Cyperus strigosus L. var. robustior (Kunth) Britton
             Cyperus strigosus L. var. stenolepis (Torr.) Kük.
             Mariscus stenolepis (Torr.) C.B.Clarke
             Mariscus strigosus (L.) C.B.Clarke
    Cyperus X mesochorus Geise X +
        midland sand sedge
             Cyperus houghtonii Torr. var. uberior Kük.
             Cyperus lupulinus (Spreng.) Marcks X C. schweinitzii Torr. subsp. lupulinus
  Genus: Dulichium

    Dulichium arundinaceum (L.) Britton var. arundinaceum *+
        pond sedge, three-way sedge
  Genus: Eleocharis

    Eleocharis acicularis (L.) Roem. & Schult.*+
        needle spike-rush
             Eleocharis acicularis (L.) Roem. & Schult. f. acicularis
             Eleocharis acicularis (L.) Roem. & Schult. f. fluitans (Döll ex Glück) Svenson
             Eleocharis acicularis (L.) Roem. & Schult. f. inundata Svenson
             Eleocharis acicularis (L.) Roem. & Schult. f. longicaulis (Desm.) Hegi
             Eleocharis acicularis (L.) Roem. & Schult. var. acicularis
             Eleocharis acicularis (L.) Roem. & Schult. var. gracilescens Svenson
             Eleocharis acicularis (L.) Roem. & Schult. var. occidentalis Svenson
             Eleocharis acicularis (L.) Roem. & Schult. var. porcata S.G.Sm.
             Eleocharis acicularis (L.) Roem. & Schult. var. submersa (Nilsson) Svenson
             Eleocharis acicularis (L.) Roem. & Schult. var. typica Svenson
             Eleocharis acicularis (L.) Roem. & Schult. f. inundata Svenson var. typica Svenson
             Scirpus acicularis L.
    Eleocharis compressa Sull. var. compressa *+
        flat-stemmed spike-rush
             Eleocharis acuminata (Muhl.) Nees
             Eleocharis elliptica Kunth var. compressa (Sull.) Drapalik & Mohlenbr.
    Eleocharis elliptica Kunth*+
        elliptic spike-rush
             Eleocharis capitata (L.) R.Br. var. borealis Svenson
             Eleocharis compressa Sull. var. atrata Svenson
             Eleocharis compressa Sull. var. borealis (Svenson) Drapalik & Mohlenbr.
             Eleocharis elliptica Kunth f. atrata (Svenson) Drapalik & Mohlenbr.
             Eleocharis elliptica Kunth var. atrata (Svenson) S.G.Sm.
             Eleocharis elliptica Kunth var. elliptica
             Eleocharis tenuis (Willd.) Schult. var. atrata (Svenson) B.Boivin
             Eleocharis tenuis (Willd.) Schult. var. borealis (Svenson) Gleason
    Eleocharis engelmannii Steud. var. detonsa A.Gray+
        Engelmann's spike-rush
             Eleocharis engelmannii Steud. f. detonsa (A.Gray) Svenson
             Eleocharis obtusa (Willd.) Schult. var. detonsa (A.Gray) Drapalik & Mohlenbr.
    Eleocharis engelmannii Steud. var. engelmannii
        Engelmann's spike-rush
             Eleocharis engelmannii Steud. var. monticola (Fernald) Svenson
             Eleocharis engelmannii Steud. var. robusta Fernald
             Eleocharis monticola Fernald
             Eleocharis monticola Fernald var. pallida H.St.John
             Eleocharis obtusa (Willd.) Schult. var. engelmannii (Steud.) Gilly
             Eleocharis ovata (Roth) Roem. & Schult. var. engelmannii (Steud.) Britton
    Eleocharis equisetoides (Elliott) Torr.*+
        horsetail spike-rush, jointed spike-sedge, knotted spike-rush
             Eleocharis elliottii A.Dietr.
             Scirpus equisetoides Elliott
    Eleocharis erythropoda Steud.*+
        bald spike-rush
             Eleocharis calva Torr.
             Eleocharis glaucescens (Willd.) Roem. & Schult.
             Scirpus glaucus Torr.
             Trichophyllum palustre (L.) Farw. var. calvum (Torr.) House
    Eleocharis intermedia Schult.*+
        matted spike-rush
             Eleocharis intermedia Schult. var. habereri Fernald
             Eleocharis reclinata Kunth
             Scirpus intermedius Muhl.
    Eleocharis obtusa (Willd.) Schult.*+
        blunt spike-rush
             Eleocharis obtusa (Willd.) Schult. var. ellipsoidalis Fernald
             Eleocharis obtusa (Willd.) Schult. var. gigantea Fernald
             Eleocharis obtusa (Willd.) Schult. var. jejuna Fernald
             Eleocharis obtusa (Willd.) Schult. var. peasei Svenson
             Eleocharis ovata (Roth) Roem. & Schult. var. obtusa (Willd.) Kük. ex Skottsb.
             Scirpus obtusus Willd.
    Eleocharis ovata (Roth) Roem. & Schult.+
        oval spike-rush
             Eleocharis annua House
             Eleocharis obtusa (Willd.) Schult. var. heuseri Uechtr.
             Eleocharis obtusa (Willd.) Schult. var. ovata (Roth) Drapalik & Mohlenbr.
             Scirpus ovatus Roth
    Eleocharis palustris (L.) Roem. & Schult.*+
        common spike-rush, marsh spike-rush
             Eleocharis calva Torr. var. australis (Nees) H.St.John
             Eleocharis mamillata auct. non H.Lindb.
             Eleocharis palustris (L.) Roem. & Schult. var. australis Nees
             Eleocharis palustris (L.) Roem. & Schult. var. major Sond.
             Eleocharis smallii Britton
             Eleocharis smallii Britton var. major (Sond.) F.Seym.
             Scirpus palustris L.
  Genus: Eriophorum

    Eriophorum angustifolium Honck. subsp. angustifolium*+
        cotton-grass
             Eriophorum angustifolium Honck. var. angustifolium
             Eriophorum polystachion auct. non L.
    Eriophorum gracile W.D.J.Koch ex Roth+
        slender cotton-grass
  Genus: Lipocarpha

    Lipocarpha micrantha (Vahl) G.C.Tucker*+
        small-flowered hemicarpha
             Hemicarpha micrantha (Vahl) Pax
             Hemicarpha micrantha (Vahl) Pax var. micrantha
             Hemicarpha micrantha (Vahl) Pax var. minor (Schrad.) Friedl.
             Hemicarpha subsquarrosa (Muhl.) Nees
             Hemicarpha subsquarrosa (Muhl.) Nees var. minor (Schrad.) Nees
             Isolepis subsquarrosa (Muhl.) Schrad.
             Isolepis subsquarrosa (Muhl.) Schrad. var. minor Schrad.
             Scirpus micranthus Vahl
             Scirpus subsquarrosus Muhl.
  Genus: Rhynchospora

    Rhynchospora alba (L.) Vahl*+
        white beak-rush
             Dichromena alba (L.) J.F.Macbr.
             Phaeocephalum album (L.) House
             Rhynchospora luquillensis Britton
             Schoenus albus L.
             Triodon albus (L.) Farw.
    Rhynchospora capillacea Torr.*+
        hair beak-rush, needle beak sedge
             Phaeocephalum capillaceum (Torr.) Farw.
             Rhynchospora capillacea Torr. f. capillacea
             Rhynchospora capillacea Torr. f. leviseta (E.J.Hill) Fernald
             Rhynchospora capillacea Torr. var. leviseta E.J.Hill ex A.Gray
             Rhynchospora setacea (Muhl.) MacMill., 1892, non Vahl 1806
             Rhynchospora smallii Britton
             Triodon capillaceus (Torr.) Farw.
  Genus: Schoenoplectus

    Schoenoplectus acutus (Muhl. ex Bigelow) A.Löve & D.Löve var. acutus *+
        hard-stem bulrush
             Schoenoplectus lacustris (L.) Palla subsp. acutus
             Scirpus acutus Muhl. ex Bigelow
             Scirpus lacustris L., pro parte
    Schoenoplectus acutus (Muhl. ex Bigelow) A.Löve & D.Löve X S. tabernaemontani (C.C.Gmel.) Palla+
    Schoenoplectus hallii (A.Gray) S.G.Sm.+
        Hall's bulrush
             Scirpus hallii A.Gray
             Scirpus supinus L. var. hallii (A.Gray) A.Gray
    Schoenoplectus pungens (Vahl) Palla*+
        chair-maker's rush, common three-square bulrush
             Schoenoplectus pungens (Vahl) Palla var. badius (J.Presl & K.Presl) S.G.Sm.
             Schoenoplectus pungens (Vahl) Palla var. longispicatus (Britton) S.G.Sm.
             Schoenoplectus pungens (Vahl) Palla var. pungens
             Scirpus americanus of Amer. authors, not Pers.
             Scirpus americanus Pers. var. longispicatus Britton
             Scirpus americanus Pers. var. monophyllus (J.Presl & C.Presl) T.Koyama
             Scirpus chilensis Nees & Meyen ex Kunth
             Scirpus monophyllus J.Presl & C.Presl
             Scirpus pungens Vahl
             Scirpus pungens Vahl subsp. monophyllus
             Scirpus pungens Vahl var. longispicatus (Britton) Roy L.Taylor & MacBryde
    Schoenoplectus smithii (A.Gray) Soják var. setosus (Fernald) S.G.Sm.+
        blunt-scale bulrush, Smith's bulrush
             Scirpus smithii A.Gray f. setosus (Fernald) Fernald
             Scirpus smithii A.Gray var. setosus Fernald
    Schoenoplectus subterminalis (Torr.) Soják*+
        swaying bulrush, water bulrush, water club-rush
             Scirpus subterminalis Torr.
    Schoenoplectus tabernaemontani (C.C.Gmel.) Palla*+
        great bulrush, soft-stem bulrush
             Schoenoplectus lacustris (L.) Palla subsp. creber
             Schoenoplectus validus (Vahl) A.Löve & D.Löve
             Scirpus lacustris L. subsp. creber
             Scirpus lacustris L. subsp. glaucus
             Scirpus lacustris L. subsp. tabernaemontani
             Scirpus lacustris L. subsp. validus
             Scirpus lacustris L. var. tabernaemontani (C.C.Gmel.) Döll
             Scirpus tabernaemontani C.C.Gmel.
             Scirpus validus Vahl
             Scirpus validus Vahl var. creber Fernald
             Scirpus validus Vahl f. megastachyus Fernald var. creber Fernald
  Genus: Scirpus

    Scirpus atrovirens Willd.*+
        black bulrush, dark-green bulrush
             Scirpus atrovirens Willd. f. proliferus F.J.Herm.
             Scirpus atrovirens Willd. var. atrovirens
             Scirpus atrovirens Willd. var. pycnocephalus Fernald
    Scirpus cyperinus (L.) Kunth*+
        wool-grass
             Eriophorum cyperinum L.
             Scirpus cyperinus (L.) Kunth var. andrewsii (Fernald) Fernald
             Scirpus cyperinus (L.) Kunth var. condensatus Fernald
             Scirpus cyperinus (L.) Kunth var. cyperinus
             Scirpus cyperinus (L.) Kunth var. eriophorum (Michx.) Kuntze
             Scirpus cyperinus (L.) Kunth var. laxus (A.Gray) Beetle
             Scirpus cyperinus (L.) Kunth var. pelius Fernald
             Scirpus cyperinus (L.) Kunth f. condensatus (Fernald) S.F.Blake var. pelius Fernald
             Scirpus cyperinus (L.) Kunth var. rubricosus (Fernald) Gilly
             Scirpus eriophorum Michx.
             Scirpus rubricosus Fernald
    Scirpus cyperinus (L.) Kunth X S. pedicellatus Fernald+
    Scirpus georgianus R.M.Harper+
        bristleless dark-green bulrush, Georgia bulrush
             Scirpus atrovirens Willd. var. georgianus (R.M.Harper) Fernald, pro parte
    Scirpus microcarpus J.Presl & C.Presl*+
        panicled bulrush
             Scirpus microcarpus J.Presl & C.Presl var. longispicatus M.Peck
             Scirpus microcarpus J.Presl & C.Presl var. rubrotinctus (Fernald) M.E.Jones
             Scirpus rubrotinctus Fernald
             Scirpus rubrotinctus Fernald f. confertus (Fernald) Weath.
             Scirpus rubrotinctus Fernald var. confertus Fernald
             Scirpus sylvaticus L. var. digynus Boeck.
    Scirpus pallidus (Britton) Fernald+
        pale bulrush
             Scirpus atrovirens Willd. var. pallidus Britton
    Scirpus pedicellatus Fernald+
        stalked wool-grass
             Scirpus cyperinus (L.) Kunth var. pedicellatus (Fernald) Schuyler
             Scirpus pedicellatus Fernald var. pullus Fernald
    Scirpus pendulus Muhl.*+
        rufous bulrush
             Scirpus lineatus auct. non Michx.
  Genus: Scleria

    Scleria triglomerata Michx.*+
        stone-rush, tall nut-rush, whip nut-rush, whip-grass
             Scleria flaccida Steud.
             Scleria nitida Willd.
  Genus: Trichophorum

    Trichophorum cespitosum (L.) Schur*+
        tufted bulrush, tufted club-rush, tussock bulrush
             Baeothryon cespitosum (L.) A.Dietr.
             Scirpus bracteatus Bigelow
             Scirpus cespitosus L.
             Scirpus cespitosus L. var. austriacus (Pall.) Asch. & Graebn.
             Scirpus cespitosus L. var. callosus Bigelow
             Scirpus cespitosus L. var. delicatulus Fernald
    Trichophorum clintonii (A.Gray) S.G.Sm.*+
        Clinton's bulrush
             Scirpus clintonii A.Gray
             Scirpus planifolius Muhl. var. brevifolius Torr.
Family: Dennstaedtiaceae
  Genus: Dennstaedtia

    Dennstaedtia punctilobula (Michx.) T.Moore*+
        eastern hay-scented fern, hay-scented fern
             Nephrodium punctilobulum Michx.
  Genus: Pteridium

    Pteridium aquilinum (L.) Kuhn var. latiusculum (Desv.) Underw. ex A.Heller*+
        bracken, bracken fern, eastern bracken fern
             Pteridium latiusculum (Desv.) Fr.
             Pteris latiuscula Desv.
Family: Dioscoreaceae
  Genus: Dioscorea

    Dioscorea villosa L.*+
        colic-root, wild yam, yam root
             Dioscorea cliffortiana Lam.
             Dioscorea glauca Muhl. ex Bartlett
             Dioscorea hexaphylla Raf.
             Dioscorea hirticaulis Bartlett
             Dioscorea lloydiana E.H.L.Krause
             Dioscorea longifolia Raf.
             Dioscorea megaptera Raf.
             Dioscorea paniculata Michx.
             Dioscorea paniculata Michx. var. glabrifolia Bartlett
             Dioscorea pruinosa Kunth
             Dioscorea quaternata J.F.Gmel.
             Dioscorea quaternata J.F.Gmel. var. glauca (Muhl. ex Bartlett) Fernald
             Dioscorea quaternata J.F.Gmel. var. quaternata
             Dioscorea quinata J.F.Gmel.
             Dioscorea repanda Raf.
             Dioscorea villosa L. f. glabrifolia (Bartlett) Fernald
             Dioscorea villosa L. subsp. glabrifolia
             Dioscorea villosa L. subsp. glauca
             Dioscorea villosa L. subsp. hirticaulis
             Dioscorea villosa L. subsp. quaternata
             Dioscorea villosa L. var. glabrifolia (Bartlett) S.F.Blake
             Dioscorea villosa L. var. hirticaulis (Bartlett) Ahles
             Dioscorea villosa L. var. vera Prain & Burkill
             Dioscorea villosa L. var. villosa
             Dioscorea waltheri Desf.
Family: Dipsacaceae
  Genus: Dipsacus

    Dipsacus fullonum L. subsp. sylvestris*+
        common teasel, wild teasel
             Dipsacus sylvestris Huds.
    Dipsacus laciniatus L.+
        cut-leaved teasel
  Genus: Knautia

    Knautia arvensis (L.) Coult.*+
        blue-buttons, field scabiosa
             Scabiosa arvensis L.
Family: Droseraceae
  Genus: Drosera

    Drosera intermedia Hayne*+
        narrow-leaved sundew, spoon-leaf sundew
             Drosera intermedia Hayne f. subcaulescens Melvill
Family: Dryopteridaceae
  Genus: Athyrium

    Athyrium filix-femina (L.) Roth ex Mert. var. angustum (Willd.) G.Lawson*+
        common lady fern, lady fern, northeastern lady fern, northern lady fern
             Aspidium angustum Willd.
             Asplenium elatius Link
             Athyrium angustum (Willd.) C.Presl
             Athyrium angustum (Willd.) C.Presl var. elatius (Link) Butters
             Athyrium angustum (Willd.) C.Presl var. rubellum (Gilbert) Butters
             Athyrium angustum (Willd.) C.Presl var. subtripinnatum Butters
             Athyrium filix-femina (L.) Roth ex Mert. subsp. angustum
             Athyrium filix-femina (L.) Roth ex Mert. var. michauxii (Spreng.) Farw.
             Athyrium filix-femina (L.) Roth ex Mert. f. elatius (Link) Clute var. michauxii (Spreng.) Farw.
             Athyrium filix-femina (L.) Roth ex Mert. f. rubellum (Gilbert) Farw. var. michauxii (Spreng.) Farw.
             Athyrium filix-femina (L.) Roth ex Mert. var. rubellum Gilbert
  Genus: Cystopteris

    Cystopteris bulbifera (L.) Bernh.*+
        bladder fern, bulblet bladder fern, bulblet fragile fern
             Filix bulbifera (L.) Underw.
             Polypodium bulbiferum L.
    Cystopteris fragilis (L.) Bernh.*+
        bladder fern, brittle bladder fern, northern fragile fern
             Cystopteris dickieana Sim
             Cystopteris fragilis (L.) Bernh. subsp. dickieana
             Cystopteris fragilis (L.) Bernh. var. angustata Lawson
             Cystopteris fragilis (L.) Bernh. var. fragilis
             Cystopteris fragilis (L.) Bernh. var. woodsioides H.Christ
             Filix fragilis (L.) Gilib.
             Polypodium fragile L.
    Cystopteris tennesseensis Shaver+
        Tennessee bladder fern
             Cystopteris fragilis (L.) Bernh. f. simulans Weath.
             Cystopteris fragilis (L.) Bernh. var. simulans (Weath.) McGregor
             Cystopteris fragilis (L.) Bernh. var. tennesseensis (Shaver) McGregor
             Cystopteris X tennesseensis Shaver X
    Cystopteris tenuis (Michx.) Desv.*+
        MacKay's brittle fern, upland brittle bladder fern
             Nephrodium tenue Michx.
             Cystopteris fragilis (L.) Bernh. var. mackayi G.Lawson
    Cystopteris X illinoensis R.C.Moran X +
        Illinois bladder fern
  Genus: Diplazium

    Diplazium pycnocarpon (Spreng.) M.Broun*+
        glade fern, narrow-leaved glade fern, narrow-leaved spleenwort
             Asplenium angustifolium Michx.
             Asplenium pycnocarpon Spreng.
             Homalosorus pycnocarpos (Spreng.) Pic.Serm.
             Athyrium angustifolium (Michx.) Milde
             Athyrium pycnocarpon (Spreng.) Tidestr.
  Genus: Dryopteris

    Dryopteris carthusiana (Vill.) H.P.Fuchs*+
        spinulose wood fern, toothed wood fern
             Aspidium spinulosum (O.F.Müll.) Sw.
             Dryopteris austriaca (Jacq.) Woyn. var. spinulosa (O.F.Müll) Fiori
             Dryopteris spinulosa (O.F.Müll.) Watt
             Polypodium carthusianum Vill.
             Polypodium spinulosum O.F.Müll.
             Thelypteris spinulosa (O.F.Müll.) Nieuwl.
    Dryopteris cristata (L.) A.Gray*+
        crested shield fern, crested wood fern
             Aspidium cristatum (L.) Sw.
             Polypodium cristatum L.
             Thelypteris cristata (L.) Nieuwl.
    Dryopteris goldiana (Hook. ex Goldie) A.Gray*+
        giant wood fern, Goldie's fern, Goldie's wood fern
             Aspidium goldianum Hook. ex Goldie
             Thelypteris goldiana (Hook. ex Goldie) Nieuwl.
    Dryopteris intermedia (Muhl. ex Willd.) A.Gray*+
        fancy wood fern, glandular wood fern, intermediate wood fern
             Aspidium intermedium Muhl. ex Willd.
             Aspidium spinulosum (O.F.Müll.) Sw. var. intermedium (Muhl. ex Willd.) D.C.Eaton
             Dryopteris austriaca (Jacq.) Woyn. var. intermedia (Muhl. ex Willd.) C.V.Morton
             Dryopteris spinulosa (O.F.Müll.) Watt var. intermedia (Muhl. ex Willd.) Underw.
             Thelypteris spinulosa (O.F.Müll.) Nieuwl. var. intermedia (Muhl. ex Willd.) Nieuwl.
    Dryopteris marginalis (L.) A.Gray*+
        marginal shield fern, marginal wood fern
             Aspidium marginale (L.) Sw.
             Polypodium marginale L.
             Thelypteris marginalis (L.) Nieuwl.
    Dryopteris X boottii (Tuck.) Underw. (pro sp.) X *+
        Boott's wood fern
             Aspidium boottii Tuck.
             Thelypteris boottii (Tuck.) Nieuwl.
    Dryopteris X triploidea Wherry X +
        triploid wood fern
             Dryopteris austriaca (Jacq.) Woyn. var. fructuosa (Gilbert) C.V.Morton
             Dryopteris intermedia (Muhl. ex Willd.) A.Gray var. fructuosa (Gilbert) Wherry
             Dryopteris spinulosa (O.F.Müll.) Watt var. fructuosa (Gilbert) Trudell
             Thelypteris spinulosa (O.F.Müll.) Nieuwl. var. fructuosa (Gilbert) Fernald
    Dryopteris X uliginosa (A.Braun ex Dowell) Druce X +
        spinulose crested wood fern
             Dryopteris cristata (L.) A.Gray X D. spinulosa (O.F.Müll.) Watt
  Genus: Gymnocarpium

    Gymnocarpium dryopteris (L.) Newman*+
        common oak fern, western oak fern
             Dryopteris disjuncta (Rupr.) C.V.Morton
             Dryopteris dryopteris (L.) Britton
             Dryopteris linnaeana C.Chr.
             Lastrea dryopteris (L.) Bory
             Polypodium dryopteris L.
             Phegopteris dryopteris (L.) Fée
             Thelypteris dryopteris (L.) Sloss.
  Genus: Matteuccia

    Matteuccia struthiopteris (L.) Todaro var. pensylvanica (Willd.) C.V.Morton*+
        American ostrich fern, ostrich fern
             Matteuccia pensylvanica (Willd.) Raymond
             Matteuccia struthiopteris (L.) Todaro var. pubescens (Terry) Clute
             Onoclea struthiopteris (L.) Hoffm. var. pensylvanica (Willd.) B.Boivin
             Pteretis nodulosa (Michx.) Nieuwl.
             Pteretis nodulosa (Michx.) Nieuwl. f. pubescens (Terry) Fernald
             Pteretis pensylvanica (Willd.) Fernald
             Pteretis pensylvanica (Willd.) Fernald f. pubescens (Terry) Fernald
             Pteretis struthiopteris (L.) Nieuwl.
             Struthiopteris pensylvanica Willd.
  Genus: Onoclea

    Onoclea sensibilis L.*+
        sensitive fern
             Onoclea sensibilis L. f. obtusilobata (Schkuhr) Gilbert
             Onoclea sensibilis L. var. obtusilobata (Schkuhr) Torr.
  Genus: Polystichum

    Polystichum acrostichoides (Michx.) Schott*+
        Christmas fern
             Nephrodium acrostichoides Michx.
             Polystichum acrostichoides (Michx.) Schott var. acrostichoides
             Polystichum acrostichoides (Michx.) Schott var. schweinitzii (Beck) Small
  Genus: Woodsia

    Woodsia ilvensis (L.) R.Br.*+
        rusty cliff fern, rusty woodsia
             Acrostichum ilvense L.
    Woodsia obtusa (Spreng.) Torr. subsp. obtusa*+
        blunt-lobe cliff fern, blunt-lobed woodsia
             Polypodium obtusum Spreng.
Family: Elaeagnaceae
  Genus: Elaeagnus

    Elaeagnus angustifolia L.*+
        oleaster, Russian olive
    Elaeagnus umbellata Thunb.*+
        autumn olive
  Genus: Shepherdia

    Shepherdia argentea (Pursh) Nutt.*+
        buffalo-berry, silver buffalo-berry
             Elaeagnus utilis A.Nelson
             Hippophae argentea Pursh
             Lepargyrea argentea (Pursh) Greene
Family: Equisetaceae
  Genus: Equisetum

    Equisetum arvense L.*+
        common horsetail, field horsetail
             Equisetum arvense L. f. alpestre (Wahlenb.) Luerss.
             Equisetum arvense L. f. boreale (Bong.) Klinge
             Equisetum arvense L. f. decumbens (G.Mey.) W.D.J.Koch
             Equisetum arvense L. f. ramulosum (Rupr.) Klinge
             Equisetum arvense L. f. varium (Milde) Klinge
             Equisetum arvense L. var. alpestre Wahlenb.
             Equisetum arvense L. var. boreale (Bong.) Rupr.
             Equisetum arvense L. f. pseudo-varium Vict. var. boreale (Bong.) Rupr.
             Equisetum arvense L. f. pseudo-alpestre Vict. var. boreale (Bong.) Rupr.
             Equisetum arvense L. var. campestre Wahlenb.
             Equisetum arvense L. var. riparium Farw.
             Equisetum calderi B.Boivin
    Equisetum fluviatile L.*+
        pipes, river horsetail, water horsetail
             Equisetum fluviatile L. f. linnaeanum (Döll) M.Broun
             Equisetum fluviatile L. f. minus (R.Br.) M.Broun
             Equisetum fluviatile L. f. natans (Vict.) M.Broun
             Equisetum fluviatile L. var. limosum (L.) Gilbert
             Equisetum limosum L.
    Equisetum hyemale L. subsp. affine*+
        common scouring rush, pipes, scouring rush horsetail
             Equisetum affine Engelm.
             Equisetum hyemale L. var. affine (Engelm.) A.A.Eaton
             Equisetum hyemale L. var. californicum Milde
             Equisetum hyemale L. var. pseudohyemale (Farw.) C.V.Morton
             Equisetum hyemale L. var. robustum (A.Braun) A.A.Eaton
             Equisetum prealtum Raf.
             Equisetum robustum A.Braun
             Equisetum robustum A.Braun var. affine Engelm.
             Hippochaete hyemalis (L.) Bruhin subsp. affinis
    Equisetum laevigatum A.Braun*+
        smooth horsetail, smooth scouring rush
             Equisetum funstonii A.A.Eaton
             Equisetum kansanum J.H.Schaffn.
             Equisetum laevigatum A.Braun subsp. funstonii
             Hippochaete laevigata (A.Braun) Farw.
    Equisetum pratense Ehrh.*+
        meadow horsetail
             Equisetum pratense Ehrh. f. nanum (Milde) Klinge
    Equisetum sylvaticum L.*+
        wood horsetail, woodland horsetail
             Equisetum sylvaticum L. var. multiramosum (Fernald) Wherry
             Equisetum sylvaticum L. var. pauciramosum Milde
             Equisetum sylvaticum L. f. multiramosum Fernald var. pauciramosum Milde
    Equisetum variegatum Schleich. ex F.Weber & D.Mohr subsp. variegatum*+
        variegated horsetail, variegated scouring rush
             Equisetum variegatum Schleich. ex F.Weber & D.Mohr var. anceps Milde
             Equisetum variegatum Schleich. ex F.Weber & D.Mohr var. variegatum
             Hippochaete variegata (Schleich. ex F.Weber & D.Mohr) Bruhin
    Equisetum X ferrissii Clute (pro sp.) X *+
        Ferriss' horsetail
             Equisetum hyemale L. var. elatum (Engelm.) C.V.Morton
             Equisetum hyemale L. var. intermedium A.A.Eaton
             Equisetum intermedium (A.A.Eaton) Rydb.
Family: Ericaceae
  Genus: Andromeda

    Andromeda glaucophylla Link*+
        bog-rosemary
             Andromeda glaucophylla Link var. iodandra Fernald
             Andromeda polifolia L. subsp. glaucophylla
             Andromeda polifolia L. var. glaucophylla (Link) DC.
  Genus: Arctostaphylos

    Arctostaphylos uva-ursi (L.) Spreng.*+
        bearberry, kinnickinnick
             Arctostaphylos adenotricha (Fernald & J.F.Macbr.) A.Löve, D.Löve
             Arctostaphylos uva-ursi (L.) Spreng. subsp. adenotricha
             Arctostaphylos uva-ursi (L.) Spreng. subsp. coactilis
             Arctostaphylos uva-ursi (L.) Spreng. subsp. longipilosa
             Arctostaphylos uva-ursi (L.) Spreng. subsp. monoensis
             Arctostaphylos uva-ursi (L.) Spreng. subsp. stipitata
             Arctostaphylos uva-ursi (L.) Spreng. subsp. uva-ursi
             Arctostaphylos uva-ursi (L.) Spreng. var. coactilis Fernald & J.F.Macbr. subsp. uva-ursi
             Arctostaphylos uva-ursi (L.) Spreng. var. adenotricha Fernald & J.F.Macbr.
             Arctostaphylos uva-ursi (L.) Spreng. var. coactilis Fernald & J.F.Macbr.
             Arctostaphylos uva-ursi (L.) Spreng. var. leobreweri Roof
             Arctostaphylos uva-ursi (L.) Spreng. var. marinensis Roof
             Arctostaphylos uva-ursi (L.) Spreng. var. pacifica Hultén
             Arctostaphylos uva-ursi (L.) Spreng. var. stipitata (Packer & Denford) Dorn
             Arctostaphylos uva-ursi (L.) Spreng. var. suborbiculata W.Knight
             Arctostaphylos uva-ursi (L.) Spreng. var. uva-ursi
             Uva-Ursi uva-ursi (L.) Britton
  Genus: Chamaedaphne

    Chamaedaphne calyculata (L.) Moench var. angustifolia (Aiton) Rehder*+
        leather-leaf
             Andromeda calyculata L. var. angustifolia Aiton
             Cassandra calyculata (L.) D.Don var. angustifolia (Aiton) Seym.
  Genus: Epigaea

    Epigaea repens L.*+
        trailing-arbutus
             Epigaea repens L. var. glabrifolia Fernald
  Genus: Gaultheria

    Gaultheria procumbens L.+
        checkerberry, eastern teaberry, wintergreen
  Genus: Gaylussacia

    Gaylussacia baccata (Wangenh.) K.Koch*+
        black huckleberry, huckleberry
             Andromeda baccata Wangenh.
             Decachaena baccata (Wangenh.) Small
  Genus: Vaccinium

    Vaccinium angustifolium Aiton*+
        early low blueberry, low-bush blueberry, low sweet blueberry
             Vaccinium angustifolium Aiton var. hypolasium Fernald
             Vaccinium angustifolium Aiton var. laevifolium House
             Vaccinium angustifolium Aiton var. nigrum (A.W.Wood) Dole
             Vaccinium brittonii Porter ex E.P.Bicknell
             Vaccinium lamarckii Camp
             Vaccinium nigrum (A.W.Wood) Britton
             Vaccinium pensilvanicum Lam.
             Vaccinium pensilvanicum Lam. var. angustifolium (Aiton) A.Gray
             Vaccinium pensilvanicum Lam. var. nigrum A.W.Wood
    Vaccinium myrtilloides Michx.*+
        Canada blueberry, velvet-leaf blueberry, velvet-leaf huckleberry
             Cyanococcus canadensis (Kalm ex A.Rich.) Rydb.
             Vaccinium angustifolium Aiton var. myrtilloides (Michx.) House
             Vaccinium canadense Kalm ex A.Rich.
             Vaccinium pensilvanicum Lam. var. myrtilloides (Michx.) Fernald
Family: Eriocaulaceae
  Genus: Eriocaulon

    Eriocaulon aquaticum (Hill) Druce*+
        seven-angle pipewort, white buttons
             Cespa aquatica Hill
             Eriocaulon articulatum (Huds.) Morong
             Eriocaulon pellucidum Michx.
             Eriocaulon pumilum Raf.
             Eriocaulon septangulare With.
             Nasmythia articulata Huds.
             Nasmythia septangularis (With.) Mart.
Family: Euphorbiaceae
  Genus: Acalypha

    Acalypha rhomboidea Raf.*+
        rhombic copper-leaf, three-seeded-mercury
             Acalypha virginica L. var. rhomboidea (Raf.) Cooperr.
  Genus: Chamaesyce

    Chamaesyce geyeri (Engelm.) Small*+
        Geyer's sand-mat, Geyer's spurge
             Euphorbia geyeri Engelm.
             Euphorbia geyeri Engelm. var. wheeleriana Warnock & M.C.Johnst.
    Chamaesyce glyptosperma (Engelm.) Small*+
        rib-seed sand-mat, ridge-seeded spurge
             Euphorbia glyptosperma Engelm.
    Chamaesyce maculata (L.) Small*+
        milk-purslane, spotted sand-mat, wart-weed
             Chamaesyce mathewsii Small
             Chamaesyce supina (Raf.) Moldenke
             Chamaesyce tracyi Small
             Euphorbia maculata L.
             Euphorbia supina Raf.
    Chamaesyce nutans (Lag.) Small*+
        eye-bane, nodding spurge
             Chamaesyce maculata auct. non (L.) Small
             Chamaesyce preslii (Guss.) Arthur
             Euphorbia maculata auct. non L.
             Euphorbia nutans Lag.
             Euphorbia preslii Guss.
    Chamaesyce vermiculata (Raf.) House*+
        hairy spurge, worm-seed sand-mat
             Chamaesyce rafinesquii (Greene) Arthur
             Euphorbia hirsuta (Torr.) Wiegand
             Euphorbia hypericifolia L. var. hirsuta Torr.
             Euphorbia rafinesquii Greene
             Euphorbia vermiculata Raf.
  Genus: Croton

    Croton glandulosus L. var. septentrionalis Müll.Arg.*+
        sand croton, tooth-leaved croton, tropical croton, vente conmigo
  Genus: Euphorbia

    Euphorbia corollata L.*+
        flowering spurge
             Euphorbia corollata L. var. angustifolia Elliott
             Euphorbia corollata L. var. corollata
             Euphorbia corollata L. var. mollis Millsp.
             Euphorbia corollata L. var. paniculata (Elliott) Boiss.
             Euphorbia marilandica Greene
             Euphorbia pubentissima Michx.
             Tithymalopsis corollata (L.) Klotzsch & Garcke
             Tithymalopsis marilandica (Greene) Small
             Tithymalopsis olivacea Small
    Euphorbia cyparissias L.*+
        cypress spurge, graveyard spurge
             Galarhoeus cyparissias (L.) Small ex Rydb.
             Tithymalus cyparissias (L.) Hill
    Euphorbia davidii Subils*+
        David's spurge
             Euphorbia dentata auct. non Michx.
             Euphorbia dentata Michx. var. gracillima Millsp.
    Euphorbia esula L. var. esula *+
        leafy spurge, wolf's-milk
             Euphorbia intercedens Podp. ex Harrington
             Euphorbia poderae Croizat
             Galarhoeus esula (L.) Rydb.
             Tithymalus esula (L.) Hill
    Euphorbia marginata Pursh*+
        snow-on-the-mountain
             Agaloma marginata (Pursh) A.Löve & D.Löve
             Dichrophyllum marginatum (Pursh) Klotzsch & Garcke
             Lepadena marginata (Pursh) Nieuwl.
    Euphorbia peplus L.+
        petty spurge
             Galarhoeus peplus (L.) Haw.
             Tithymalus peplus (L.) Hill
Family: Fabaceae
  Genus: Amorpha

    Amorpha canescens Pursh*+
        lead-plant
             Amorpha brachycarpa E.J.Palmer
             Amorpha canescens Pursh f. canescens
             Amorpha canescens Pursh f. glabrata (A.Gray) Fassett
             Amorpha canescens Pursh var. glabrata A.Gray
    Amorpha fruticosa L.*+
        desert indigo-bush, false indigo, indigo-bush
             Amorpha angustifolia (Pursh) F.E.Boynton
             Amorpha arizonica Rydb.
             Amorpha bushii Rydb.
             Amorpha croceolanata P.Watson
             Amorpha curtissii Rydb.
             Amorpha dewinkeleri Small
             Amorpha fruticosa L. var. angustifolia Pursh
             Amorpha fruticosa L. f. angustifolia var. angustifolia Pursh
             Amorpha fruticosa L. f. glabrata E.J.Palmer var. angustifolia Pursh
             Amorpha fruticosa L. f. latior Fassett var. angustifolia Pursh
             Amorpha fruticosa L. var. croceolanata (P.Watson) P.Watson ex Mouillef.
             Amorpha fruticosa L. var. emarginata Pursh
             Amorpha fruticosa L. var. oblongifolia E.J.Palmer
             Amorpha fruticosa L. var. occidentalis (Abrams) Kearney & Peebles
             Amorpha fruticosa L. var. tennesseensis (Shuttlew. ex Kunze) E.J.Palmer
             Amorpha occidentalis Abrams
             Amorpha occidentalis Abrams var. arizonica (Rydb.) E.J.Palmer
             Amorpha occidentalis Abrams var. emarginata (Pursh) E.J.Palmer
             Amorpha tennesseensis Shuttlew. ex Kunze
             Amorpha virgata Small
  Genus: Amphicarpaea

    Amphicarpaea bracteata (L.) Fernald*+
        American hog-peanut, hog-peanut
             Amphicarpaea bracteata (L.) Fernald var. bracteata
             Amphicarpaea bracteata (L.) Fernald var. comosa (L.) Fernald
             Amphicarpaea bracteata (L.) Fernald var. pitcheri (Torr. & A.Gray) Fassett
             Amphicarpaea comosa (L.) G.Don
             Amphicarpaea monoica (L.) Elliott
             Amphicarpaea pitcheri Torr. & A.Gray
             Falcata comosa (L.) Kuntze
             Falcata pitcheri (Torr. & A.Gray) Kuntze
             Glycine bracteata L.
             Glycine comosa L.
             Glycine monoica L.
  Genus: Anthyllis

    Anthyllis vulneraria L. subsp. vulneraria+
        common kidney-vetch, woundwort
  Genus: Apios

    Apios americana Medik.*+
        common groundnut, Indian-potato, potato-bean
             Apios americana Medik. f. pilosa Steyerm.
             Apios americana Medik. var. turrigera Fernald
             Apios tuberosa Moench
             Glycine apios L.
  Genus: Astragalus

    Astragalus canadensis L. var. canadensis *+
        Canadian milk-vetch
             Astragalus canadensis L. var. carolinianus (L.) M.E.Jones
             Astragalus canadensis L. var. longilobus Fassett
             Astragalus carolinianus L.
             Astragalus halei Rydb.
  Genus: Baptisia

    Baptisia alba (L.) Vent. var. macrophylla (Larisey) Isely*+
        large-leaved wild indigo, milky white indigo, white wild indigo
             Baptisia lactea (Raf.) Thieret var. lactea
             Baptisia leucantha Torr. & A.Gray
             Baptisia leucantha Torr. & A.Gray var. divaricata Larisey
             Baptisia leucantha Torr. & A.Gray var. pauciflora Larisey
             Baptisia pendula Larisey var. macrophylla Larisey
             Dolichos lacteus Raf.
    Baptisia australis (L.) R.Br. ex W.T.Aiton*+
        blue false indigo
    Baptisia bracteata Muhl. ex Elliott var. glabrescens (Larisey) Isely*+
        cream wild indigo, long-bracted wild indigo, plains wild indigo
             Baptisia bracteata Muhl. ex Elliott var. leucophaea (Nutt.) Kartesz & Gandhi
             Baptisia leucophaea Nutt.
             Baptisia leucophaea Nutt. var. glabrescens Larisey
  Genus: Caragana

    Caragana arborescens Lam.*+
        pea-tree, Siberian pea-shrub
  Genus: Coronilla

    Coronilla varia L.*+
        crown-vetch, purple crown-vetch
             Securigera varia (L.) Lassen
  Genus: Dalea

    Dalea candida Michx. ex Willd.*
        slender white prairie-clover
    Dalea candida Michx. ex Willd. var. candida +
        slender white prairie-clover, white prairie-clover
             Petalostemon candidum (Michx. ex Willd.) Michx.
    Dalea purpurea Vent. var. purpurea *+
        purple prairie-clover, violet prairie-clover
             Petalostemon molle Rydb.
             Petalostemon purpureum (Vent.) Rydb.
             Petalostemon purpureum (Vent.) Rydb. f. pubescens (A.Gray) Fassett
             Petalostemon purpureum (Vent.) Rydb. f. purpureum
             Petalostemon purpureum (Vent.) Rydb. var. molle (Rydb.) B.Boivin
  Genus: Desmodium

    Desmodium canadense (L.) DC.*+
        Canadian tick-trefoil, showy tick-trefoil
             Hedysarum canadense L.
             Meibomia canadensis (L.) Kuntze
    Desmodium cuspidatum (Muhl. ex Willd.) DC. ex Loudon var. longifolium (Torr. & A.Gray) B.G.Schub.+
        hairy bracted tick-trefoil, large-bracted tick-trefoil
             Desmodium bracteosum (Michx.) DC. var. longifolium (Torr. & A.Gray) B.L.Rob.
             Desmodium canadense (L.) DC. var. longifolium Torr. & A.Gray
             Desmodium longifolium (Torr. & A.Gray) Smyth
             Meibomia longifolia (Torr. & A.Gray) Vail
    Desmodium glutinosum (Muhl. ex Willd.) A.W.Wood*+
        cluster-leaf tick-trefoil, pointed tick-trefoil
             Desmodium acuminatum (Michx.) DC.
             Desmodium acuminatum (Michx.) DC. f. chandonnetii (Lunell) Fassett
             Desmodium glutinosum (Muhl. ex Willd.) A.W.Wood f. chandonnetii (Lunell) B.G.Schub.
             Hedysarum acuminatum Michx.
             Hedysarum glutinosum Muhl. ex Willd.
             Meibomia acuminata (Michx.) S.F.Blake
             Meibomia grandiflora auct. non (Walter) Kuntze
             Meibomia grandiflora (Walter) Kuntze var. chandonnetii Lunell
    Desmodium illinoense A.Gray*+
        Illinois tick-trefoil, prairie tick-trefoil
             Meibomia illinoensis (A.Gray) Kuntze
    Desmodium nudiflorum (L.) DC.*+
        bare-stemmed tick-trefoil, naked tick-trefoil
             Desmodium nudiflorum (L.) DC. f. foliolatum (Farw.) Fassett
             Desmodium nudiflorum (L.) DC. f. nudiflorum
             Desmodium nudiflorum (L.) DC. f. personatum Fassett
             Hedysarum nudiflorum L.
             Meibomia nudiflora (L.) Kuntze
             Meibomia nudiflora (L.) Kuntze f. foliolata Farw.
    Desmodium paniculatum (L.) DC. var. dillenii (Darl.) Isely+
        Dillenius' tick-trefoil, panicled tick-trefoil, perplexed tick-trefoil
             Desmodium dillenii Darl.
             Desmodium glabellum (Michx.) DC., pro parte
             Desmodium perplexum B.G.Schub.
             Meibomia dillenii (Darl.) Kuntze
  Genus: Glycine

    Glycine max (L.) Merr.*+
        soybean
             Dolichos soja L.
             Glycine gracilis Skvortsov
             Glycine hispida (Moench) Maxim.
             Phaseolus max L.
             Soja hispida Moench
             Soja max (L.) Piper
  Genus: Glycyrrhiza

    Glycyrrhiza lepidota Pursh*+
        American licorice, wild licorice
             Glycyrrhiza glutinosa Nutt.
             Glycyrrhiza lepidota Pursh var. glutinosa (Nutt.) S.Watson
             Glycyrrhiza lepidota Pursh var. lepidota
  Genus: Lathyrus

    Lathyrus ochroleucus Hook.*+
        cream pea-vine, pale vetchling, white pea
    Lathyrus palustris L.*+
        marsh pea, marsh vetchling, slender-stem pea-vine
             Lathyrus myrtifolius Muhl. ex Willd.
             Lathyrus myrtifolius Muhl. ex Willd. var. macranthus T.G.White
             Lathyrus palustris L. subsp. pilosus
             Lathyrus palustris L. var. genuinus Gren. & Godr.
             Lathyrus palustris L. var. linearifolius Ser.
             Lathyrus palustris L. var. macranthus (T.G.White) Fernald
             Lathyrus palustris L. var. meridionalis Butters & H.St.John
             Lathyrus palustris L. var. myrtifolius (Muhl. ex Willd.) A.Gray
             Lathyrus palustris L. var. palustris
             Lathyrus palustris L. var. pilosus (Cham.) Ledeb.
             Lathyrus palustris L. var. retusus Fernald & H.St.John
             Lathyrus pilosus Cham.
             Orobus myrtifolius (Muhl. ex Willd.) A.Hall
    Lathyrus sylvestris L.*+
        everlasting pea, flat pea-vine, perennial pea
    Lathyrus tuberosus L.*+
        tuberous sweet pea, tuberous vetchling
    Lathyrus venosus Muhl. ex Willd.*+
        forest pea, veiny pea, veiny pea-vine
             Lathyrus oreophilus Wooton & Standl.
             Lathyrus venosus Muhl. ex Willd. subsp. arkansanus
             Lathyrus venosus Muhl. ex Willd. var. arkansanus Fassett
             Lathyrus venosus Muhl. ex Willd. var. intonsus Butters & H.St.John
             Lathyrus venosus Muhl. ex Willd. var. meridionalis Butters & H.St.John
  Genus: Lespedeza

    Lespedeza capitata Michx.*+
        round-headed bush-clover, round-headed lespedeza
             Lespedeza bicknellii House
             Lespedeza capitata Michx. var. capitata
             Lespedeza capitata Michx. var. longifolia (DC.) Torr. & A.Gray
             Lespedeza capitata Michx. var. sericea (Hook. & Arn.) Torr. & A.Gray
             Lespedeza capitata Michx. var. stenophylla Bissell & Fernald
             Lespedeza capitata Michx. var. velutina (E.P.Bicknell) Fernald
             Lespedeza capitata Michx. var. vulgaris Torr. & A.Gray
             Lespedeza longifolia DC.
             Lespedeza velutina E.P.Bicknell
    Lespedeza leptostachya Engelm.*+
        prairie bush-clover, prairie lespedeza
    Lespedeza thunbergii (DC.) Nakai+
        shrubby bush-clover, Thunberg's lespedeza
             Desmodium thunbergii DC.
  Genus: Lotus

    Lotus corniculatus L.*+
        bird's-foot deer-vetch, bird's-foot trefoil
             Lotus corniculatus L. var. arvensis (Schkuhr) Ser. ex DC.
  Genus: Lupinus

    Lupinus perennis L.*+
        sundial lupine, wild lupine
    Lupinus perennis L. var. occidentalis S.Watson+
        wild lupine
             Lupinus perennis L. var. occidentalis S.Watson subsp. perennis
  Genus: Medicago

    Medicago lupulina L.*+
        black medick
             Medicago cupianiana Guss.
             Medicago lupulina L. var. cupianiana (Guss.) Boiss.
             Medicago lupulina L. var. glandulosa Neilr.
    Medicago sativa L. subsp. falcata+
        alfalfa, yellow alfalfa
             Medicago falcata L.
    Medicago sativa L. subsp. sativa+
        alfalfa, blue alfalfa
    Medicago X varia Martyn X +
        hybrid alfalfa
             Medicago sativa L. subsp. varia
  Genus: Melilotus

    Melilotus albus Medik.*+
        white sweet-clover
             Melilotus albus Medik. var. annuus Coe
    Melilotus officinalis (L.) Lam.*+
        yellow sweet-clover
             Trifolium melilotus-officinalis L.
  Genus: Pediomelum

    Pediomelum esculentum (Pursh) Rydb.*+
        breadroot scurf-pea, pomme-de-prairie, shaggy prairie-turnip, prairie-turnip
             Psoralea esculenta Pursh
  Genus: Robinia

    Robinia pseudoacacia L.*+
        black locust
             Robinia pseudoacacia L. var. rectissima (L.) Raber
  Genus: Tephrosia

    Tephrosia virginiana (L.) Pers.*+
        goat's-rue, rabbit-pea, Virginia tephrosia
             Cracca latidens Small
             Cracca mohrii Rydb.
             Cracca virginiana L.
             Tephrosia holosericea Nutt.
             Tephrosia latidens (Small) Standl.
             Tephrosia mohrii (Rydb.) Godfrey
             Tephrosia virginiana (L.) Pers. var. glabra Nutt.
             Tephrosia virginiana (L.) Pers. var. holosericea (Nutt.) Torr. & A.Gray
             Tephrosia virginiana (L.) Pers. var. virginiana
  Genus: Trifolium

    Trifolium arvense L.*+
        rabbit-foot clover
    Trifolium campestre Schreb.*+
        field clover, low hop clover, pinnate hop clover
             Trifolium procumbens L.
    Trifolium hybridum L.*+
        alsike clover
             Trifolium elegans Savi
             Trifolium hybridum L. subsp. elegans
             Trifolium hybridum L. var. elegans (Savi) Boiss.
             Trifolium hybridum L. var. pratense Rabenh.
    Trifolium incarnatum L.+
        crimson clover
             Trifolium incarnatum L. var. elatius Gibelli & Belli
    Trifolium pratense L.*+
        red clover
             Trifolium pratense L. f. albiflorum Puskal
             Trifolium pratense L. f. leucochraceum Asch. & Prantl
             Trifolium pratense L. f. semipurpureum (Strobl) Asch. & Graebn.
             Trifolium pratense L. var. frigidum auct. non Gaudin
             Trifolium pratense L. var. sativum (Mill.) Schreb.
             Trifolium pratense L. f. flavicans (Vis.) Hayek var. sativum (Mill.) Schreb.
    Trifolium repens L.*+
        white clover
    Trifolium resupinatum L.
        Persian clover, reversed clover, stawberry clover
  Genus: Vicia

    Vicia americana Muhl. ex Willd. subsp. americana*+
        American vetch
             Vicia americana Muhl. ex Willd. subsp. oregana
             Vicia americana Muhl. ex Willd. subsp. truncata
             Vicia americana Muhl. ex Willd. var. americana
             Vicia americana Muhl. ex Willd. var. oregana (Nutt.) A.Nelson
             Vicia americana Muhl. ex Willd. var. truncata (Nutt.) Brewer
             Vicia americana Muhl. ex Willd. var. villosa (Kellogg) F.J.Herm.
             Vicia californica Greene
             Vicia californica Greene var. madrensis Jeps.
             Vicia oregana Nutt.
             Vicia sparsifolia Nutt. ex Torr. & A.Gray var. truncata (Nutt.) S.Watson
             Vicia truncata Nutt.
    Vicia caroliniana Walter*+
        Carolina vetch, pale vetch, wood vetch
             Vicia hugeri Small
    Vicia cracca L. subsp. cracca+
        bird vetch, cow vetch
             Vicia cracca L. var. cracca
    Vicia cracca L. subsp. tenuifolia+
        bird vetch, cow vetch
             Vicia cracca L. var. tenuifolia (Roth) Beck
             Vicia tenuifolia Roth
    Vicia sativa L. subsp. nigra*+
        common vetch, narrow-leaved vetch, spring vetch
             Vicia angustifolia L.
             Vicia angustifolia L. var. segetalis (Thuill.) W.D.J.Koch
             Vicia angustifolia L. var. uncinata (Desf. ex Nyman) Rouy
             Vicia sativa L. var. angustifolia (L.) Ser.
             Vicia sativa L. var. nigra L.
             Vicia sativa L. var. segetalis (Thuill.) Ser.
             Vicia segetalis Thuill.
             Vicia uncinata Desf. ex Nyman
    Vicia villosa Roth*+
        hairy vetch, winter vetch
             Vicia villosa Roth subsp. villosa
Family: Fagaceae
  Genus: Castanea

    Castanea dentata (Marshall) Borkh.*+
        American chestnut
             Castanea americana (Michx.) Raf.
             Fagus-Castanea dentata Marshall
  Genus: Quercus

    Quercus alba L.*+
        white oak
             Quercus alba L. var. subcaerulea Pickens & M.C.Pickens
             Quercus alba L. var. subflavea Pickens & M.C.Pickens
    Quercus bicolor Willd.*+
        swamp white oak
             Quercus bicolor Willd. var. angustifolia Dippel
             Quercus bicolor Willd. var. cuneiformis Dippel
    Quercus ellipsoidalis E.J.Hill*+
        Hill's oak, northern pin oak
             Quercus ellipsoidalis E.J.Hill var. kaposianensis J.W.Moore
    Quercus macrocarpa Michx.*+
        bur oak
             Quercus macrocarpa Michx. f. olivaeformis (F.Michx.) Trel.
             Quercus macrocarpa Michx. subsp. olivaeformis
             Quercus macrocarpa Michx. var. depressa (Nutt.) Engelm.
             Quercus macrocarpa Michx. var. macrocarpa
             Quercus macrocarpa Michx. var. olivaeformis (F.Michx.) A.Gray
             Quercus mandanensis Rydb.
             Quercus obtusiloba Michx. var. depressa Nutt.
             Quercus olivaeformis F.Michx.
    Quercus muhlenbergii Engelm.*
        chinkapin oak, chinquapin oak, yellow oak
             Quercus acuminata (Michx.) Sarg.
             Quercus alexanderi Britton
             Quercus brayi Small
             Quercus muhlenbergii Engelm. f. alexanderi (Britton) Trel.
             Quercus prinus L. var. acuminata Michx.
             Quercus prinoides Willd. var. acuminata (Michx.) Gleason
    Quercus rubra L.*+
        northern red oak
             Quercus ambigua F.Michx.
             Quercus borealis F.Michx.
             Quercus borealis F.Michx. var. borealis
             Quercus borealis F.Michx. var. maxima (Marshall) Ashe
             Quercus coccinea Münchh. var. ambigua (F.Michx.) A.Gray
             Quercus maxima (Marshall) Ashe
             Quercus rubra L. var. ambigua (F.Michx.) Fernald
             Quercus rubra L. var. ambigua (F.Michx.) Houba
             Quercus rubra L. var. borealis (F.Michx.) Farw.
             Quercus rubra L. var. maxima Marshall
             Quercus rubra L. var. rubra
    Quercus velutina Lam.*+
        black oak
             Quercus tinctoria W.Bartram
             Quercus velutina Lam. f. missouriensis (Sarg.) Trel.
             Quercus velutina Lam. var. missouriensis Sarg.
    Quercus X bebbiana C.K.Schneid. X *+
        Bebb's oak
             Quercus alba L. X Q. macrocarpa Michx.
    Quercus X hawkinsii Sudw. X *+
        Hawkins' oak
    Quercus X palaeolithicola Trel. X *+
Family: Fumariaceae
  Genus: Corydalis

    Corydalis aurea Willd. subsp. aurea*+
        golden corydalis, scrambled eggs
             Capnoides aureum (Willd.) Kuntze
             Corydalis aurea Willd. var. aurea
             Corydalis washingtoniana Fedde
    Corydalis micrantha (Engelm. ex A.Gray) A.Gray subsp. micrantha+
        slender corydalis, small-flowered corydalis
             Capnoides micranthum (Engelm. ex A.Gray) Britton
             Corydalis aurea Willd. var. micrantha Engelm. ex A.Gray
             Corydalis micrantha (Engelm. ex A.Gray) A.Gray var. micrantha
    Corydalis sempervirens (L.) Pers.*+
        pink and yellow corydalis, pale corydalis, rock harlequin
             Capnoides sempervirens (L.) Borkh.
             Fumaria sempervirens L.
  Genus: Dicentra

    Dicentra canadensis (Goldie) Walp.*+
        squirrel-corn
             Bicuculla canadensis (Goldie) Millsp.
             Corydalis canadensis Goldie
    Dicentra cucullaria (L.) Bernh.*+
        Dutchman's-breeches
             Bicuculla cucullaria (L.) Millsp.
             Bicuculla occidentalis Rydb.
             Dicentra cucullaria (L.) Bernh. var. occidentalis (Rydb.) M.Peck
             Dicentra occidentalis (Rydb.) Fedde
             Fumaria cucullaria L.
Family: Gentianaceae
  Genus: Gentiana

    Gentiana alba Muhl. ex Nutt.*+
        cream gentian, pale gentian, yellow gentian
             Gentiana flavida A.Gray
    Gentiana andrewsii Griseb. var. andrewsii *+
        Andrews' gentian, bottle gentian, prairie closed gentian
             Dasystephana andrewsii (Griseb.) Small
             Gentiana andrewsii Griseb. f. albiflora Britton
             Pneumonanthe andrewsii (Griseb.) W.A.Weber
    Gentiana puberulenta J.S.Pringle*+
        downy gentian, prairie gentian
             Gentiana puberula auct. non Michx.
    Gentiana X billingtonii Farw. (pro sp.) X +
        Billington's gentian
  Genus: Gentianella

    Gentianella quinquefolia (L.) Small subsp. occidentalis*+
        ague-weed, stiff gentian
             Amarella occidentalis (A.Gray) Greene
             Gentianella occidentalis (A.Gray) Small
             Gentianella quinquefolia (L.) Small var. occidentalis (A.Gray) Small
             Gentiana quinqueflora Lam. var. occidentalis A.Gray
             Gentiana quinquefolia L. var. occidentalis (A.Gray) Hitchc.
  Genus: Gentianopsis

    Gentianopsis crinita (Froel.) Ma*+
        fringed gentian, greater fringed gentian
             Anthopogon crinitum (Froel.) Raf.
             Gentiana crinita Froel.
             Gentianella crinita (Froel.) G.Don
             Gentianella crinita (Froel.) G.Don subsp. crinita
             Gentianella crinita (Froel.) G.Don subsp. nevadensis
             Gentiana nevadensis Gilg
             Gentiana ventricosa Griseb.
    Gentianopsis procera (Holm) Ma*+
        Great Plains fringed gentian, lesser fringed gentian, small fringed gentian
             Anthopogon virgatum Raf.
             Gentiana barbata Froel. var. browniana Hook.
             Gentianella crinita (Froel.) G.Don subsp. procera
             Gentiana crinita Froel. var. browniana (Hook.) B.Boivin
             Gentiana procera Holm
             Gentianella procera (Holm) Hiitonen
             Gentianopsis virgata (Raf.) Holub
Family: Geraniaceae
  Genus: Erodium

    Erodium cicutarium (L.) L'Hér. ex Aiton*+
        red-stem filaree, red-stem stork's-bill, stork's-bill
             Geranium cicutarium L.
  Genus: Geranium

    Geranium carolinianum L. var. confertiflorum Fernald+
        Carolina crane's-bill, Carolina geranium
    Geranium maculatum L.*+
        Crane's-bill, spotted geranium, wild geranium
             Geranium maculatum L. f. albiflorum (Raf.) House
    Geranium sibiricum L.*+
        Siberian crane's-bill, Siberian geranium
Family: Grossulariaceae
  Genus: Ribes

    Ribes americanum Mill.*+
        American black currant, eastern black currant, wild black currant
             Ribes americanum Mill. f. pauciglandulosum Fassett
             Ribes floridum L'Hér.
    Ribes cynosbati L.*+
        dogberry, eastern prickly gooseberry, prickly wild gooseberry
             Grossularia cynosbati (L.) Mill.
             Ribes cynosbati L. f. inerme Rehder
             Ribes cynosbati L. var. atrox Fernald
             Ribes cynosbati L. var. glabratum Fernald
             Ribes cynosbati L. var. inerme (Rehder) L.H.Bailey
             Ribes huronense Rydb.
    Ribes hirtellum Michx.*+
        hairy-stem gooseberry, northern gooseberry, swamp gooseberry
             Grossularia hirtella (Michx.) Spach
             Ribes hirtellum Michx. var. calcicola (Fernald) Fernald
             Ribes hirtellum Michx. var. saxosum (Hook.) Fernald
             Ribes oxyacanthoides L. var. calcicola Fernald
             Ribes oxyacanthoides L. var. hirtellum (Michx.) Scoggan
             Ribes oxyacanthoides L. var. saxosum (Hook.) Coville
             Ribes saxosum Hook.
    Ribes missouriense Nutt.*+
        Missouri gooseberry
             Grossularia missouriensis (Nutt.) Coville & Britton
             Ribes gracile Pursh, non Michx.
             Ribes missouriense Nutt. var. ozarkanum Fassett
    Ribes nigrum L.+
        European black currant, garden black currant
    Ribes odoratum H.Wendl.*+
        buffalo-currant, clove currant, golden currant
             Ribes aureum Pursh var. villosum DC.
    Ribes rubrum L.*+
        cherry-currant, cultivated currant, garden red currant
             Ribes sativum Syme
             Ribes sylvestre (Lam.) Mert. & W.D.J.Koch
             Ribes vulgare Lam.
Family: Haloragaceae
  Genus: Myriophyllum

    Myriophyllum heterophyllum Michx.+
        two-leaf water-milfoil, various-leaved water-milfoil
    Myriophyllum sibiricum Kom.*+
        common water-milfoil, short-spike water-milfoil
             Myriophyllum exalbescens Fernald
             Myriophyllum exalbescens Fernald var. magdalenense (Fernald) A.Löve
             Myriophyllum magdalenense Fernald
             Myriophyllum spicatum L. subsp. exalbescens
             Myriophyllum spicatum L. subsp. squamosum
             Myriophyllum spicatum L. var. capillaceum Lange
             Myriophyllum spicatum L. var. exalbescens (Fernald) Jeps.
             Myriophyllum spicatum L. var. squamosum (Laest. ex Hartman) Hartman
    Myriophyllum spicatum L.*+
        Eurasian water-milfoil, European water-milfoil, spike water-milfoil
    Myriophyllum verticillatum L.*+
        whorled water-milfoil
             Myriophyllum verticillatum L. var. cheneyi Fassett
             Myriophyllum verticillatum L. var. intermedium W.D.J.Koch
             Myriophyllum verticillatum L. var. pectinatum Wallr.
             Myriophyllum verticillatum L. var. pinnatifidum Wallr.
  Genus: Proserpinaca

    Proserpinaca palustris L. var. crebra Fernald & Griscom*+
        common mermaid-weed, marsh mermaid-weed
             Proserpinaca palustris L. var. amblyogona Fernald
Family: Hamamelidaceae
  Genus: Hamamelis

    Hamamelis virginiana L.*+
        American witch-hazel
             Hamamelis androgyna Walter
             Hamamelis corylifolia Moench
             Hamamelis dioica Walter
             Hamamelis macrophylla Pursh
             Hamamelis virginiana L. var. angustifolia Nieuwl.
             Hamamelis virginiana L. var. henryi Jenne
             Hamamelis virginiana L. var. macrophylla (Pursh) Nutt.
             Hamamelis virginiana L. var. orbiculata Nieuwl.
             Hamamelis virginiana L. var. parvifolia Nutt.
             Trilopus dentata Raf.
             Trilopus estivalis Raf.
             Trilopus nigra Raf.
             Trilopus nigra Raf. var. catesbiana Raf.
             Trilopus parvifolia (Nutt.) Raf.
             Trilopus rotundifolia Raf.
             Trilopus virginica (L.) Raf.
Family: Hippocastanaceae
  Genus: Aesculus

    Aesculus glabra Willd. var. glabra *+
        Ohio buckeye
             Aesculus glabra Willd. f. pallida (Willd.) Fernald
             Aesculus glabra Willd. var. leucodermis Sarg.
             Aesculus glabra Willd. var. micrantha Sarg.
             Aesculus glabra Willd. var. monticola Sarg.
             Aesculus glabra Willd. var. pallida (Willd.) Kirchn.
             Aesculus glabra Willd. var. sargentii Rehder
             Aesculus pallida Willd.
Family: Hippuridaceae
  Genus: Hippuris

    Hippuris vulgaris L.*+
        common mare's-tail, mare's-tail
Family: Hydrangeaceae
  Genus: Philadelphus

    Philadelphus coronarius L.*
        European mock-orange, sweet mock-orange
Family: Hydrocharitaceae
  Genus: Elodea

    Elodea canadensis Michx.*+
        Canadian waterweed, common waterweed
             Anacharis canadensis (Michx.) Planch.
             Anacharis canadensis (Michx.) Planch. var. planchonii (Casp.) Vict.
             Elodea brandegeae H.St.John
             Elodea ioensis Wylie
             Elodea linearis (Rydb.) H.St.John
             Elodea planchonii Casp.
             Philotria canadensis (Michx.) Britton
             Philotria linearis Rydb.
    Elodea nuttallii (Planch.) H.St.John+
        free-flowered waterweed, slender waterweed
             Anacharis nuttallii Planch.
             Anacharis occidentalis (Pursh) Vict.
             Elodea columbiana H.St.John
             Elodea minor (Engelm. ex Casp.) Farw.
             Elodea occidentalis (Pursh) H.St.John
             Philotria angustifolia (Muhl.) Britton ex Rydb.
             Philotria minor (Engelm. ex Casp.) Small
             Philotria nuttallii (Planch.) Rydb.
             Philotria occidentalis (Pursh) House
             Udora verticillata (L.f.) Spreng. var. minor Engelm. ex Casp.
  Genus: Vallisneria

    Vallisneria americana Michx.*+
        American eelgrass, water-celery
             Vallisneria americana Michx. var. americana
             Vallisneria asiatica Michx.
             Vallisneria neotropicalis Vict.
             Vallisneria spiralis auct. non L.
             Vallisneria spiralis L. var. asiatica (Michx.) Torr.
Family: Hydrophyllaceae
  Genus: Ellisia

    Ellisia nyctelea (L.) L.*+
        Aunt Lucy, ellisia, water-pod
             Ellisia nyctelea (L.) L. var. coloradensis Brand
             Nyctelea nyctelea (L.) Britton
  Genus: Hydrophyllum

    Hydrophyllum appendiculatum Michx.*+
        great water-leaf
             Decemium appendiculatum (Michx.) Small
    Hydrophyllum virginianum L.*+
        John's-cabbage, Shawnee-salad, Virginia water-leaf
             Hydrophyllum virginianum L. var. atranthum (Alexander) Constance
             Hydrophyllum virginianum L. var. virginianum
Family: Hypericaceae
  Genus: Hypericum

    Hypericum boreale (Britton) E.P.Bicknell*+
        northern St. John's-wort
             Hypericum boreale (Britton) E.P.Bicknell f. callitrichoides Fassett
             Hypericum mutilum L. subsp. boreale
    Hypericum gentianoides (L.) Britton, Sterns & Poggenb.*+
        orange-grass, pine-weed
             Sarothra gentianoides L.
    Hypericum kalmianum L.*+
        Kalm's St. John's-wort
    Hypericum majus (A.Gray) Britton*+
        larger Canadian St. John's-wort
             Hypericum canadense L. var. majus A.Gray
    Hypericum mutilum L.+
        small-flowered St. John's-wort, weak St. John's-wort
             Hypericum mutilum L. var. latisepalum Fernald
             Hypericum mutilum L. var. longifolium R.Keller
             Hypericum mutilum L. var. parviflorum (Willd.) Fernald
             Hypericum parviflorum Willd.
    Hypericum perforatum L.*+
        common St. John's-wort, Klamath-weed, St. John's-wort
    Hypericum punctatum Lam.*+
        spotted St. John's-wort
             Hypericum punctatum Lam. f. subpetiolatum (E.P. Bicknell ex Small) Fernald
             Hypericum subpetiolatum E.P.Bicknell ex Small
    Hypericum pyramidatum Aiton*+
        giant St. John's-wort, great St. John's-wort
             Hypericum ascyron L., misapplied
  Genus: Triadenum

    Triadenum fraseri (Spach) Gleason*+
        bog St. John's-wort, Fraser's marsh St. John's-wort
             Elodea fraseri Spach
             Hypericum virginicum L. var. fraseri (Spach) Fernald
             Triadenum virginicum (L.) Raf. subsp. fraseri
             Triadenum virginicum (L.) Raf. var. fraseri (Spach) Cooperr.
    Triadenum virginicum (L.) Raf.*+
        Virginia marsh St. John's-wort
             Hypericum virginicum L.
Family: Iridaceae
  Genus: Belamcanda

    Belamcanda chinensis (L.) DC.*+
        blackberry-lily, leopard-flower
             Gemmingia chinensis (L.) Kuntze
  Genus: Iris

    Iris pumila L.*+
        dwarf iris
    Iris virginica L. var. shrevei (Small) E.S.Anderson*+
        blue flag, Shreve's iris, southern blue flag, Virginia iris
             Iris shrevei Small
             Iris versicolor L. var. shrevei (Small) B.Boivin
  Genus: Sisyrinchium

    Sisyrinchium albidum Raf.*+
        common blue-eyed-grass, pale blue-eyed-grass, white blue-eyed-grass
             Sisyrinchium asheianum E.P.Bicknell
             Sisyrinchium bermudianum L. var. albidum (Raf.) A.Gray
             Sisyrinchium floridanum Raf.
             Sisyrinchium hastile E.P.Bicknell
             Sisyrinchium niveum Raf.
             Sisyrinchium scabrellum E.P.Bicknell
    Sisyrinchium campestre E.P.Bicknell*+
        prairie blue-eyed-grass
             Sisyrinchium campestre E.P.Bicknell f. flaviflorum (E.P.Bicknell) Steyerm.
             Sisyrinchium campestre E.P.Bicknell var. campestre
             Sisyrinchium campestre E.P.Bicknell var. kansanum E.P.Bicknell
             Sisyrinchium flaviflorum E.P.Bicknell
             Sisyrinchium kansanum (E.P.Bicknell) Alexander
    Sisyrinchium strictum E.P.Bicknell+
        mountain blue-eyed-grass
Family: Juglandaceae
  Genus: Carya

    Carya cordiformis (Wangenh.) K.Koch*+
        bitter-nut hickory, pig-nut, yellow-bud hickory
             Carya cordiformis (Wangenh.) K.Koch var. latifolia Sarg.
             Hicoria cordiformis (Wangenh.) Britton
             Hicoria minima (Marshall) Britton
             Juglans alba L. var. minima Marshall
             Juglans cordiformis Wangenh.
    Carya glabra (Mill.) Sweet
        pig-nut hickory
             Carya ovalis (Wangenh.) Sarg.
    Carya ovata (Mill.) K.Koch var. ovata *+
        shagbark hickory, shellbark hickory
             Carya ovata (Mill.) K.Koch var. fraxinifolia Sarg.
             Carya ovata (Mill.) K.Koch var. nuttallii Sarg.
             Carya ovata (Mill.) K.Koch var. pubescens Sarg.
             Hicoria alba Britton, pro parte
             Hicoria ovata (Mill.) Britton
  Genus: Juglans

    Juglans cinerea L.*+
        butternut, white walnut
             Wallia cinerea (L.) Alef.
    Juglans nigra L.*+
        black walnut
             Wallia nigra (L.) Alef.
Family: Juncaceae
  Genus: Juncus

    Juncus acuminatus Michx.+
        sharp-fruited rush, taper-tip rush, tufted rush
             Juncus acuminatus Michx. var. legitimus Engelm.
             Juncus pallescens E.Mey. ex Buchenau
             Juncus pondii A.W.Wood
    Juncus arcticus Willd. var. balticus (Willd.) Trautv.*+
        Arctic rush, Baltic rush, wire rush
             Juncus arcticus Willd. subsp. ater
             Juncus arcticus Willd. subsp. balticus
             Juncus arcticus Willd. subsp. littoralis
             Juncus arcticus Willd. var. gracilis Hook.
             Juncus arcticus Willd. var. littoralis (Engelm.) B.Boivin
             Juncus arcticus Willd. var. montanus (Engelm.) S.L.Welsh
             Juncus arcticus Willd. var. montanus (Engelm.) Balslev
             Juncus ater Rydb.
             Juncus balticus Willd.
             Juncus balticus Willd. subsp. vallicola
             Juncus balticus Willd. var. condensatus Suksd.
             Juncus balticus Willd. var. eremicus Jeps.
             Juncus balticus Willd. var. littoralis Engelm.
             Juncus balticus Willd. f. dissitiflorus Engelm. ex Fernald & Wiegand var. littoralis Engelm.
             Juncus balticus Willd. var. melanogenus Fernald & Wiegand
             Juncus balticus Willd. var. montanus Engelm.
             Juncus balticus Willd. var. vallicola Rydb.
             Juncus breweri Engelm.
             Juncus vallicola (Rydb.) Rydb.
    Juncus bufonius L.*+
        toad rush
             Juncus bufonius L. var. congestus (S.Watson) Fernald
             Juncus bufonius L. var. halophilus Buchenau & Fern.
             Juncus bufonius L. var. hybridus Farw.
             Juncus bufonius L. var. occidentalis F.J.Herm.
             Juncus bufonius L. var. ranarius (Songeon & E.P.Perrier) Farw.
             Juncus congestus S.Watson
             Juncus ranarius Songeon & E.P.Perrier
    Juncus canadensis J.Gay*+
        Canadian rush
             Juncus canadensis J.Gay f. apertus Fernald
             Juncus canadensis J.Gay f. canadensis
             Juncus canadensis J.Gay f. conglobatus Fernald
             Juncus canadensis J.Gay var. euroauster Fernald
             Juncus canadensis J.Gay var. longicaudatus Engl.
             Juncus canadensis J.Gay var. sparsiflorus Fernald
             Juncus longicaudatus (Engelm.) Mack.
             Juncus polycephalus Michx. var. paradoxus Torr.
    Juncus dudleyi Wiegand*+
        Dudley's rush
             Juncus tenuis Willd. var. dudleyi (Wiegand) F.J.Herm.
             Juncus tenuis Willd. var. uniflorus auct. pro parte, non Farw.
    Juncus greenei Oakes & Tuck.*+
        Greene's rush
    Juncus interior Wiegand+
        inland rush, interior rush
             Juncus interior Wiegand var. interior
    Juncus nodosus L.*+
        joint rush, jointed rush, knotted rush
             Juncus nodosus L. var. meridianus F.J.Herm.
             Juncus nodosus L. var. nodosus
             Juncus rostkovii E.Mey.
    Juncus tenuis Willd.*+
        path rush, poverty rush, roadside rush
             Juncus macer S.F.Gray
             Juncus macer S.F.Gray f. williamsii (Fernald) F.J.Herm.
             Juncus macer S.F.Gray var. williamsii (Fernald) Fernald
             Juncus tenuis Willd. f. williamsii (Fernald) F.J.Herm.
             Juncus tenuis Willd. var. multicornis E.Mey.
             Juncus tenuis Willd. var. tenuis
             Juncus tenuis Willd. var. williamsii Fernald
    Juncus torreyi Coville*+
        Torrey's rush
             Juncus megacephalus (Torr.) A.W.Wood, not M.A.Curtis, 1835
             Juncus nodosus L. var. megacephalus Torr.
  Genus: Luzula

    Luzula multiflora (Ehrh.) Lej. subsp. multiflora*+
        common wood rush
             Juncus campestris L. var. multiflorus Retz.
             Juncus multiflorus Ehrh.
             Luzula campestris (L.) DC. var. multiflora (Retz.) Celak.
Family: Juncaginaceae
  Genus: Triglochin

    Triglochin maritima L.*+
        arrow-grass, common bog arrow-grass, seaside arrow-grass
             Triglochin concinna Burtt Davy
             Triglochin concinna Burtt Davy var. debilis (M.E.Jones) J.T.Howell
             Triglochin debilis (M.E.Jones) A.Löve & D.Löve
             Triglochin elata Nutt.
             Triglochin maritimum L. var. elata (Nutt.) A.Gray
Family: Lamiaceae
  Genus: Agastache

    Agastache foeniculum (Pursh) Kuntze*+
        blue giant hyssop, fragrant giant hyssop, lavender giant hyssop
             Agastache anethiodora (Nutt.) Britton
             Stachys foeniculum Pursh
    Agastache nepetoides (L.) Kuntze*+
        catnip giant hyssop, yellow giant hyssop
             Hyssopus nepetoides L.
    Agastache scrophulariaefolia (Willd.) Kuntze*+
        figwort giant hyssop, purple giant hyssop
             Agastache scrophulariaefolia (Willd.) Kuntze var. mollis (Fernald) A.Heller
             Hyssopus scrophulariaefolius Willd.
             Lophanthus scrophulariaefolius (Willd.) Benth.
             Lophanthus scrophulariaefolius (Willd.) Benth. var. mollis Fernald
  Genus: Ajuga

    Ajuga reptans L.*+
        carpet bugle, common bugle
  Genus: Blephilia

    Blephilia ciliata (L.) Benth.*+
        downy pagoda-plant, downy wood mint, Ohio horsemint
  Genus: Chaiturus

    Chaiturus marrubiastrum (L.) Rchb.+
        lion's-tail, horehound motherwort
             Leonurus marrubiastrum L.
  Genus: Collinsonia

    Collinsonia canadensis L.*+
        Canada horse-balm, northern horse-balm, richweed, stoneroot
  Genus: Dracocephalum

    Dracocephalum parviflorum Nutt.*+
        American dragonhead
             Moldavica parviflora (Nutt.) Britton
  Genus: Galeopsis

    Galeopsis tetrahit L.*+
        brittle-stem hemp-nettle, common hemp-nettle, hemp-nettle
    Galeopsis tetrahit L. var. bifida (Boenn.) Lej. & Courtois+
        brittle-stem hemp-nettle, common hemp-nettle, hemp-nettle
             Galeopsis bifida Boenn.
  Genus: Glechoma

    Glechoma hederacea L.*+
        creeping-Charlie, gill-over-the-ground, ground-ivy
    Glechoma hederacea L. var. hederacea +
        creeping-Charlie, gill-over-the-ground, ground-ivy
             Nepeta glechoma Benth.
             Nepeta hederacea (L.) Trevis.
    Glechoma hederacea L. var. micrantha Moric.+
        creeping-Charlie, gill-over-the-ground, ground-ivy
             Glechoma hederacea L. var. parviflora (Benth.) House
             Nepeta hederacea (L.) Trevis. var. parviflora Benth.
  Genus: Hedeoma

    Hedeoma hispida Pursh*+
        rough false pennyroyal, rough pennyroyal
    Hedeoma pulegioides (L.) Pers.*+
        American false pennyroyal, American pennyroyal
             Cunila pulegioides L.
             Melissa pulegioides (L.) L.
             Ziziphora pulegioides (L.) Desf.
  Genus: Hyssopus

    Hyssopus officinalis L.*+
        hyssop
  Genus: Lamium

    Lamium amplexicaule L.*+
        henbit, dead-nettle
             Lamium amplexicaule L. f. albiflorum Dw.Moore
             Lamium amplexicaule L. var. album Pickens & M.C.Pickens
    Lamium purpureum L.*+
        purple dead-nettle, red dead-nettle
  Genus: Leonurus

    Leonurus cardiaca L.*+
        lion's-tail, motherwort
  Genus: Lycopus

    Lycopus americanus Muhl. ex W.P.C.Barton*+
        American water-horehound, common water-horehound
             Lycopus americanus Muhl. ex W.P.C.Barton var. longii Benner
             Lycopus americanus Muhl. ex W.P.C.Barton var. scabrifolius Fernald
             Lycopus sinuatus Elliott
    Lycopus uniflorus Michx.*+
        northern bugleweed, northern water-horehound
             Lycopus virginicus L. var. pauciflorus Benth.
    Lycopus X sherardii Steele (pro sp.) X +
  Genus: Marrubium

    Marrubium vulgare L.
        horehound
  Genus: Mentha

    Mentha arvensis L. var. canadensis (L.) Kuntze*+
        field mint, wild mint
             Mentha arvensis auct. non L.
             Mentha arvensis L. subsp. borealis
             Mentha arvensis L. subsp. haplocalyx
             Mentha arvensis L. var. glabrata (Benth.) Fernald
             Mentha arvensis L. var. lanata Piper
             Mentha arvensis L. var. sativa auct. non Benth.
             Mentha arvensis L. var. villosa (Benth.) S.R.Stewart
             Mentha arvensis L. f. glabrata (Benth.) S.R.Stewart var. villosa (Benth.) S.R.Stewart
             Mentha canadensis L.
             Mentha glabrior (Hook.) Rydb.
             Mentha penardii (Briq.) Rydb.
    Mentha spicata L.*+
        spearmint
             Mentha cordifolia auct.
             Mentha viridis L.
    Mentha X gracilis Sole (pro sp.) X +
        little-leaved mint, red mint
             Mentha cardiaca J.Gerard ex Baker
             Mentha gentilis auct. non L.
             Mentha X cardiaca J.Gerard ex Baker X
             Mentha X gentilis L. var. cardiaca (J.Gerard ex Baker) B.Boivin (pro nm.) X
             Mentha X muelleriana auct. non F.W.Schultz X
    Mentha X villosa Huds. (pro sp.) X +
        foxtail mint, hairy mint, woolly mint
             Mentha alopecuroides Hull
  Genus: Monarda

    Monarda fistulosa L. subsp. fistulosa*+
        bee balm, wild bergamot
             Monarda fistulosa L. f. albescens Farw.
             Monarda fistulosa L. var. mollis (L.) Benth. subsp. fistulosa
             Monarda fistulosa L. var. fistulosa
             Monarda fistulosa L. var. mollis (L.) Benth.
             Monarda fistulosa L. f. albiflora (Farw.) Sherff var. mollis (L.) Benth.
             Monarda mollis L.
             Monarda mollis L. f. albiflora Farw.
             Monarda scabra Beck
    Monarda punctata L. var. villicaulis (Pennell) E.J.Palmer & Steyerm.*+
        dotted horsemint, horsemint
             Monarda punctata L. var. villicaulis (Pennell) E.J.Palmer & Steyerm. subsp. punctata
             Monarda punctata L. subsp. villicaulis
  Genus: Nepeta

    Nepeta cataria L.*+
        catnip
    Nepeta mussinii Spreng. ex Henckel*+
        Persian cat-mint
  Genus: Ocimum

    Ocimum basilicum L.*+
        sweet basil
             Ocimum americanum L.
  Genus: Perilla

    Perilla frutescens (L.) Britton*+
        beefsteak-plant, perilla, perilla-mint
  Genus: Physostegia

    Physostegia virginiana (L.) Benth. subsp. virginiana*+
        false dragonhead, obedience
             Dracocephalum denticulatum Aiton
             Dracocephalum formosius (Lunell) Rydb.
             Dracocephalum virginianum L.
             Physostegia denticulata (Aiton) Britton
             Physostegia formosior Lunell
             Physostegia granulosa Fassett
             Physostegia speciosa (Sweet) Sweet
             Physostegia speciosa (Sweet) Sweet var. glabriflora Fassett
             Physostegia virginiana (L.) Benth. var. elongata B.Boivin
             Physostegia virginiana (L.) Benth. var. formosior (Lunell) B.Boivin
             Physostegia virginiana (L.) Benth. var. granulosa (Fassett) Fernald
             Physostegia virginiana (L.) Benth. var. speciosa (Sweet) A.Gray
             Physostegia virginiana (L.) Benth. var. virginiana
  Genus: Prunella

    Prunella vulgaris L.*+
        heal-all, lawn prunella, self-heal
    Prunella vulgaris L. subsp. lanceolata+
        lance self-heal
             Prunella pennsylvanica Willd. var. lanceolata W.P.C.Barton
             Prunella vulgaris L. var. elongata Benth.
             Prunella vulgaris L. var. lanceolata (W.P.C.Barton) Fernald
             Prunella vulgaris L. f. iodocalyx Fernald var. lanceolata (W.P.C.Barton) Fernald
    Prunella vulgaris L. subsp. vulgaris+
        heal-all, lawn prunella, self-heal
             Prunella parviflora Gilib.
             Prunella vulgaris L. var. atropurpurea Fernald
             Prunella vulgaris L. var. calvescens Fernald
             Prunella vulgaris L. var. hispida Benth.
             Prunella vulgaris L. var. minor Sm.
             Prunella vulgaris L. var. nana Clute
             Prunella vulgaris L. var. parviflora (Gilib.) J.W.Moore
             Prunella vulgaris L. var. rouleauiana Vict.
             Prunella vulgaris L. var. vulgaris
  Genus: Pycnanthemum

    Pycnanthemum tenuifolium Schrad.*+
        narrow-leaved mountain mint, slender mountain mint
             Koellia flexuosa auct. non (Walter) MacMill.
             Pycnanthemum flexuosum auct. non (Walter) Britton, Sterns & Poggenb.
    Pycnanthemum virginianum (L.) T.Durand & B.D.Jacks. ex B.L.Rob. & Fernald*+
        common mountain mint, Virginia mountain mint
  Genus: Salvia

    Salvia azurea Michx. ex Lam. var. grandiflora Benth.*+
        azure blue sage, blue sage
             Salvia azurea Michx. ex Lam. subsp. pitcheri
             Salvia pitcheri Torr. ex Benth.
    Salvia nemorosa L.+
        woodland sage
    Salvia reflexa Hornem.*+
        lance-leaf sage, Rocky Mountain sage
             Salvia lanceaefolia Poir.
    Salvia splendens Sellow ex Roem. & Schult.*+
        scarlet sage
  Genus: Satureja

    Satureja hortensis L.+
        summer savory
  Genus: Scutellaria

    Scutellaria galericulata L.*+
        common skullcap, marsh skullcap
             Scutellaria epilobiifolia A.Ham.
             Scutellaria galericulata L. subsp. pubescens
             Scutellaria galericulata L. var. epilobiifolia (A.Ham.) Jordal
             Scutellaria galericulata L. var. pubescens Benth.
    Scutellaria lateriflora L.*+
        blue skullcap, mad-dog skullcap
             Scutellaria lateriflora L. var. lateriflora
    Scutellaria ovata Hill subsp. ovata*+
        forest skullcap, heart-leaved skullcap
             Scutellaria cordifolia Muhl.
             Scutellaria mississippiensis M.Martens
             Scutellaria ovata Hill subsp. calcarea
             Scutellaria ovata Hill subsp. mississippiensis
             Scutellaria ovata Hill subsp. versicolor
             Scutellaria ovata Hill var. calcarea (Epling) Gleason
             Scutellaria ovata Hill var. ovata
             Scutellaria ovata Hill var. versicolor (Nutt.) Fernald
             Scutellaria versicolor Nutt.
    Scutellaria parvula Michx. var. missouriensis (Torr.) Goodman & C.A.Lawson*+
        Leonard's skullcap, smooth small skullcap
             Scutellaria ambigua Nutt.
             Scutellaria ambigua Nutt. var. missouriensis Torr.
             Scutellaria leonardii Epling
             Scutellaria nervosa Pursh var. ambigua (Nutt.) Fernald
             Scutellaria parvula Michx. var. ambigua (Nutt.) Fernald
             Scutellaria parvula Michx. var. leonardii (Epling) Fernald
  Genus: Stachys

    Stachys palustris L.*+
        hedge-nettle, marsh hedge-nettle, woundwort
    Stachys palustris L. subsp. arenicola+
        hedge-nettle, marsh hedge-nettle
             Stachys homotricha (Fernald) Rydb.
             Stachys palustris L. var. homotricha Fernald
             Stachys palustris L. var. phaneropoda Weath.
             Stachys pilosa Nutt. var. arenicola (Britton) G.A.Mulligan & D.B.Munro
    Stachys palustris L. subsp. palustris+
        hedge-nettle, marsh hedge-nettle, woundwort
             Stachys palustris L. var. macrocalyx Jenn.
             Stachys palustris L. var. nipigonensis Jenn.
             Stachys palustris L. var. palustris
    Stachys tenuifolia Willd. var. tenuifolia *+
        narrow-leaved hedge-nettle, smooth hedge-nettle
             Stachys glabra Riddell
             Stachys hispida Pursh
             Stachys palustris L. var. hispida (Pursh) B.Boivin
             Stachys tenuifolia Willd. var. hispida (Pursh) Fernald
             Stachys tenuifolia Willd. var. platyphylla Fernald
  Genus: Teucrium

    Teucrium canadense L.*+
        American germander, Canadian germander, wood sage
    Teucrium canadense L. var. occidentale (A.Gray) E.M.McClint. & Epling*+
        American germander, western germander, wood sage
             Teucrium boreale E.P.Bicknell
             Teucrium canadense L. subsp. occidentale
             Teucrium canadense L. subsp. viscidum
             Teucrium canadense L. var. boreale (E.P.Bicknell) Shinners
             Teucrium occidentale A.Gray
             Teucrium occidentale A.Gray subsp. viscidum
             Teucrium occidentale A.Gray var. boreale (E.P.Bicknell) Fernald
    Teucrium canadense L. var. virginicum (L.) Eaton+
        American germander, Virginia germander, wood sage
  Genus: Trichostema

    Trichostema brachiatum L.*+
        false-pennyroyal, fluxweed
             Isanthus brachiatus (L.) Britton, Sterns & Poggenb.
             Isanthus brachiatus (L.) Britton, Sterns & Poggenb. var. linearis Fassett
             Isanthus coeruleus Michx.
             Tetraclea viscida Lundell
Family: Lemnaceae
  Genus: Lemna

    Lemna minor L.*+
        common duckweed, lesser duckweed, small duckweed
             Lemna cyclostasa Elliott ex Schleid.
    Lemna trisulca L.*+
        forked duckweed, star duckweed
    Lemna turionifera Landolt*+
        perennial duckweed, Turion duckweed
  Genus: Spirodela

    Spirodela polyrrhiza (L.) Schleid.*+
        giant duckweed, greater duckweed
             Lemna polyrrhiza L.
             Spirodela polyrrhiza (L.) Schleid. var. masonii Daubs
  Genus: Wolffia

    Wolffia borealis (Engelm. ex Hegelm.) Landolt*+
        Northern water-meal
             Wolffia brasiliensis Wedd. var. borealis Engelm. ex Hegelm.
             Wolffia punctata auct. non Griseb.
    Wolffia columbiana H.Karst.*+
        common water-meal
             Bruniera columbiana (H.Karst.) Nieuwl.
Family: Lentibulariaceae
  Genus: Utricularia

    Utricularia geminiscapa Benj.*+
        hidden-fruited bladderwort, twin-stemmed bladderwort
             Utricularia clandestina Nutt.
    Utricularia gibba L.*+
        creeping bladderwort, humped bladderwort
             Utricularia biflora Lam.
             Utricularia gibba L. subsp. gibba
             Utricularia obtusa Sw.
             Utricularia pumila Walter
    Utricularia intermedia Hayne*+
        flat-leaved bladderwort, northern bladderwort
    Utricularia vulgaris L.*+
        Common bladderwort, great bladderwort
             Utricularia macrorhiza Leconte
             Utricularia vulgaris L. subsp. macrorhiza
             Utricularia vulgaris L. var. americana A.Gray
Family: Liliaceae
  Genus: Aletris

    Aletris farinosa L.*+
        unicorn root, white colic-root, white stargrass
  Genus: Allium

    Allium canadense L. var. canadense *+
        meadow garlic, wild garlic, wild onion
             Allium canadense L. var. ovoideum Farw.
             Allium canadense L. var. robustum Farw.
             Allium mutabile Michx.
    Allium cepa L.*+
        cultivated onion, garden onion
    Allium cernuum Roth*+
        nodding wild onion
             Allium allegheniense Small
             Allium oxyphilum Wherry
             Allium recurvatum Rydb.
    Allium schoenoprasum L.*+
        chives
             Allium schoenoprasum L. subsp. sibiricum
             Allium schoenoprasum L. var. laurentianum Farw.
             Allium schoenoprasum L. var. schoenoprasum
             Allium schoenoprasum L. var. sibiricum (L.) Hartm.
             Allium sibiricum L.
    Allium tricoccum Sol. var. burdickii Hanes*+
        narrow-leaved wild leek, wild leek
             Allium burdickii (Hanes) A.G.Jones
    Allium tricoccum Sol. var. tricoccum *+
        ramp, wild leek
             Allium pictum Moldenke
             Allium triflorum Raf.
             Ophioscorodon tricoccum (Sol.) Wallr.
             Validallium tricoccum (Sol.) Small
    Allium tuberosum Rottler ex Spreng.*+
        Chinese chives
  Genus: Asparagus

    Asparagus officinalis L.*+
        asparagus, common asparagus, garden asparagus
  Genus: Camassia

    Camassia scilloides (Raf.) Cory*+
        Atlantic camas, eastern camas, wild-hyacinth
             Camassia esculenta (Ker Gawl.) B.L.Rob.
             Cyanotris scilloides Raf.
             Quamasia hyacinthina (Raf.) Britton
             Schoenolirion texanum (Scheele) A.Gray
  Genus: Clintonia

    Clintonia borealis (Aiton) Raf.*+
        blue-bead-lily, corn-lily, yellow blue-bead-lily, yellow clintonia
             Dracaena borealis Aiton
  Genus: Convallaria

    Convallaria majalis L. var. majalis *+
        European lily-of-the-valley, lily-of-the-valley
  Genus: Erythronium

    Erythronium albidum Nutt.*+
        small white fawn-lily, white dog-tooth violet, white trout-lily
  Genus: Hemerocallis

    Hemerocallis fulva (L.) L.*+
        orange daylily, tawny daylily
             Hemerocallis fulva (L.) L. var. fulva
             Hemerocallis lilioasphodelus L. var. fulva L.
  Genus: Hypoxis

    Hypoxis hirsuta (L.) Coville*+
        common gold-star, common star-grass, yellow star-grass
             Hypoxis carolinensis Michx.
             Hypoxis decumbens L.
             Hypoxis erecta L.
             Hypoxis graminea Pursh
             Hypoxis grandis Pollard
             Hypoxis micrantha Pollard
             Hypoxis pallida Salisb.
             Hypoxis villosa Raf.
             Ornithogalum hirsutum L.
  Genus: Lilium

    Lilium lancifolium Thunb.*+
        lance-leaf tiger lily, tiger lily
             Lilium tigrinum Ker Gawl.
    Lilium michiganense Farw.*+
        Michigan lily, Turk's-cap lily
             Lilium canadense L. subsp. michiganense
             Lilium canadense L. var. umbelliferum (Farw.) B.Boivin
             Lilium michiganense Farw. var. umbelliferum Farw.
             Lilium michiganense Farw. var. uniflorum Farw.
    Lilium philadelphicum L.*+
        orange-cup lily, wood lily
             Lilium andinum Nutt.
             Lilium montanum A.Nelson
             Lilium philadelphicum L. var. andinum (Nutt.) Ker Gawl.
             Lilium philadelphicum L. var. montanum (A.Nelson) Wherry
             Lilium philadelphicum L. var. philadelphicum
             Lilium umbellatum Pursh
  Genus: Maianthemum

    Maianthemum canadense Desf.*+
        Canada bead-ruby, Canada mayflower, wild lily-of-the-valley
    Maianthemum canadense Desf. var. canadense +
        Canada bead-ruby, Canada mayflower, wild lily-of-the-valley
             Smilacina canadensis (Desf.) Pursh
             Unifolium canadense (Desf.) Greene
    Maianthemum canadense Desf. var. interius Fernald+
        Canada mayflower, wild lily-of-the-valley
             Maianthemum canadense Desf. subsp. interius
             Maianthemum canadense Desf. var. pubescens Gates & Ehlers
    Maianthemum racemosum (L.) Link subsp. racemosum*+
        false Solomon's-seal, false spikenard, large false Solomon's-seal, Solomon's-plume
             Convallaria racemosa L.
             Smilacina ciliata Desf.
             Smilacina flexicaulis Wender.
             Smilacina racemosa (L.) Desf. var. cylindrata Fernald
             Smilacina racemosa (L.) Desf. var. lanceolata B.Boivin
             Smilacina racemosa (L.) Desf. var. racemosa
             Smilacina racemosa (L.) Desf. var. typica Fernald
             Unifolium racemosum (L.) Britton
             Vagnera australis Rydb.
             Vagnera racemosa (L.) Morong
             Vagnera retusa Raf.
    Maianthemum stellatum (L.) Link*+
        little false Solomon's-seal, starflower Solomon's-seal, starry false Solomon's-seal
             Convallaria stellata L.
             Smilacina liliacea (Greene) F.L.Wynd
             Smilacina sessilifolia Nutt. ex Baker
             Smilacina stellata (L.) Desf.
             Smilacina stellata (L.) Desf. var. crassa Vict.
             Smilacina stellata (L.) Desf. var. mollis Farw.
             Smilacina stellata (L.) Desf. var. sessilifolia (Nutt. ex Baker) G.Hend.
             Smilacina stellata (L.) Desf. var. sylvatica Vict. & J.Rousseau
             Unifolium liliaceum Greene
             Unifolium stellautum (L.) Greene
             Vagnera liliacea (Greene) Rydb.
             Vagnera sessilifolia (Nutt. ex Baker) Greene
             Vagnera stellata (L.) Morong
  Genus: Muscari

    Muscari botryoides (L.) Mill.*+
        common grape-hyacinth
             Hyacinthus botryoides L.
  Genus: Ornithogalum

    Ornithogalum umbellatum L.*+
        nap-at-noon, star-of-Bethlehem, sleepy-dick
  Genus: Polygonatum

    Polygonatum biflorum (Walter) Elliott*+
        giant Solomon's-seal, king Solomon's-seal, smooth Solomon's-seal, Solomon's-seal
             Convallaria biflora Walter, pro parte
             Polygonatum biflorum (Walter) Elliot var. commutatum (Schult.f.) Morong
             Polygonatum biflorum (Walter) Elliott var. melleum (Farw.) R.P.Ownbey
             Polygonatum canaliculatum auct. non (Muhl. ex Willd.) Pursh
             Polygonatum cobrense (Wooton & Standl.) R.R.Gates
             Polygonatum commutatum (Schult.f.) A.Dietr.
             Polygonatum commutatum (Schult.f.) A.Dietr. f. foliatum H.M.Clarke
             Polygonatum giganteum A.Dietr.
             Polygonatum melleum Farw.
    Polygonatum pubescens (Willd.) Pursh*+
        downy Solomon's-seal, hairy Solomon's-seal
             Convallaria pubescens Willd.
  Genus: Scilla

    Scilla sibirica Haw.*+
        Siberian squill, squill
  Genus: Streptopus

    Streptopus lanceolatus (Aiton) Reveal var. longipes (Fernald) Reveal*+
        twisted-stalk
             Streptopus longipes Fernald
             Steptopus roseus Michx. subsp. longipes
             Streptopus roseus Michx. var. longipes (Fernald) Fassett
  Genus: Triantha

    Triantha glutinosa (Michx.) Baker*+
        false asphodel, gluten tofieldia, sticky false asphodel
             Narthecium glutinosum Michx.
             Tofieldia glutinosa (Michx.) Pers.
             Tofieldia glutinosa (Michx.) Pers. subsp. glutinosa
             Tofieldia glutinosa (Michx.) Pers. var. glutinosa
             Tofieldia racemosa (Walter) Britton, Sterns & Poggenb. var. glutinosa (Michx.) Ahles
  Genus: Trillium

    Trillium erectum L.*
        purple trillium, red trillium, stinking-Benjamin
    Trillium flexipes Raf.*+
        bent trillium, declined trillium, nodding wake-robin
             Trillium declinatum Gleason
             Trillium erectum L. var. blandum Jennison
             Trillium erectum L. var. declinatum A.Gray
             Trillium gleasoni Fernald
    Trillium grandiflorum (Michx.) Salisb.*+
        big white trillium, great white trillium, large-flowered trillium, snow trillium, white trillium, white wake-robin
             Trillium erythrocarpum Curtis 1805, not Michx. 1803
             Trillium rhomboideum Michx. var. grandiflorum Michx.
    Trillium recurvatum Beck*+
        bloody butcher, bloody noses, prairie trillium, red trillium, reflexed trillium, toadshade
  Genus: Uvularia

    Uvularia grandiflora Sm.*+
        large-flowered bellwort
    Uvularia sessilifolia L.*+
        sessile bellwort, sessile-leaved bellwort, straw-lily, wild-oats
             Oakesiella sessilifolia (L.) Small
             Oakesia sessilifolia (L.) S.Watson
  Genus: Zigadenus

    Zigadenus elegans Pursh subsp. glaucus*+
        death camas, mountain death camas, white camas
             Anticlea chlorantha (Richardson) Rydb.
             Melanthium glaucum Nutt.
             Zigadenus elegans Pursh var. glaucus (Nutt.) Preece ex Cronquist
             Zigadenus glaucus (Nutt.) Nutt.
Family: Linaceae
  Genus: Linum

    Linum perenne L.*+
        wild blue flax
    Linum sulcatum Riddell*+
        grooved yellow flax
             Cathartolinum sulcatum (Riddell) Small
             Linum sulcatum Riddell var. sulcatum
             Mesynium sulcatum (Riddell) A.Löve & D.Löve
    Linum usitatissimum L.*+
        common flax
             Linum humile Mill.
             Linum usitatissimum L. var. humile (Mill.) Pers.
             Linum usitatissimum L. var. usitatissimum
Family: Lobeliaceae
  Genus: Lobelia

    Lobelia cardinalis L. var. cardinalis *+
        cardinal-flower
    Lobelia inflata L.*+
        Indian-tobacco
    Lobelia kalmii L.*+
        bog lobelia, brook lobelia, fen lobelia, Kalm's lobelia, Ontario lobelia
             Lobelia kalmii L. f. leucantha Rouleau
             Lobelia kalmii L. var. strictiflora Rydb.
             Lobelia strictiflora (Rydb.) Lunell
    Lobelia siphilitica L.*+
        great blue lobelia
    Lobelia siphilitica L. var. ludoviciana A.DC.+
        great blue lobelia
    Lobelia siphilitica L. var. siphilitica +
        great blue lobelia
             Lobelia siphilitica L. f. albiflora Britton
    Lobelia spicata Lam.*+
        pale-spike lobelia, spiked lobelia
    Lobelia spicata Lam. var. hirtella A.Gray+
        hairy pale-spike lobelia, pale-spike lobelia, spiked lobelia
             Lobelia hirtella (A.Gray) Greene
    Lobelia spicata Lam. var. spicata +
        pale-spike lobelia, spiked lobelia
             Lobelia bracteata Small
             Lobelia spicata Lam. var. campanulata McVaugh
             Lobelia spicata Lam. var. originalis McVaugh
             Lobelia spicata Lam. var. parviflora A.Gray
Family: Lycopodiaceae
  Genus: Diphasiastrum

    Diphasiastrum complanatum (L.) Holub*+
        Christmas green, flat-branched club-moss, northern running-pine
             Diphasium anceps (Wallr.) A.Löve & D.Löve
             Diphasium complanatum (L.) Rothm.
             Diphasium complanatum (L.) Rothm. subsp. montellii
             Diphasium wallrothii H.P.Fuchs
             Lycopodium anceps Wallr.
             Lycopodium complanatum L.
             Lycopodium complanatum L. subsp. anceps
             Lycopodium complanatum L. var. canadense Vict.
    Diphasiastrum digitatum (Dill. ex A.Braun) Holub*+
        crowfoot club-moss, southern ground-cedar, southern running-pine, trailing ground-pine
             Lycopodium complanatum L. var. flabelliforme Fernald
             Lycopodium digitatum Dill. ex A.Braun
             Lycopodium flabelliforme (Fernald) Blanch.
             Lycopodium flabelliforme (Fernald) Blanch. var. ambiguum Vict.
  Genus: Huperzia

    Huperzia lucidula (Michx.) Trevis.*+
        shining club-moss, shining fir-moss
             Lycopodium lucidulum Michx.
             Lycopodium reflexum Sw., non Lam.
             Urostachys lucidulus (Michx.) Herter ex Nessel
    Huperzia porophila (F.E.Lloyd & Underw.) Holub*+
        rock club-moss
             Huperzia selago (L.) Bernh. ex Mart. & Schrank var. patens (P.Beauv.) Trevis.
             Huperzia selago (L.) Bernh. ex Mart. & Schrank var. porophila (F.E.Lloyd & Underw.) A.Löve & D.Löve
             Lycopodium lucidulum Michx. var. porophilum (F.E.Lloyd & Underw.) Clute
             Lycopodium porophilum F.E.Lloyd & Underw.
             Lycopodium selago L. subsp. patens
             Lycopodium selago L. var. patens (P.Beauv.) Desv.
             Lycopodium selago L. var. porophilum (F.E.Lloyd & Underw.) Clute
             Urostachys lucidulus (Michx.) Nessel var. porophilus (F.E.Lloyd & Underw.) Herter ex Nessel
             Urostachys porophilus (F.E.Lloyd & Underw.) Herter ex Nessel
    Huperzia X bartleyi (Cusick) Kartesz & Gandhi X +
        Bartley's club-moss
             Lycopodium lucidulum Michx. X L. porophilum F.E.Lloyd & Underw.
             Lycopodium X bartleyi Cusick X
  Genus: Lycopodium

    Lycopodium clavatum L.*+
        running club-moss, running ground-pine, running-pine, staghorn club-moss
             Lycopodium clavatum L. var. clavatum
             Lycopodium clavatum L. var. laurentianum Vict.
             Lycopodium clavatum L. var. subremotum Vict.
             Lycopodium clavatum L. var. tristachyum Hook.
    Lycopodium dendroideum Michx.*+
        northern tree club-moss, round-branched club-moss
             Lycopodium obscurum L. var. dendroideum (Michx.) D.C.Eaton
             Lycopodium obscurum L. var. hybridum Farw.
Family: Lythraceae
  Genus: Ammannia

    Ammannia robusta Heer & Regel*+
        grand red-stem, sessile tooth-cup
  Genus: Decodon

    Decodon verticillatus (L.) Elliott*+
        swamp loosestrife, water-willow, whorled loosestrife
    Decodon verticillatus (L.) Elliott var. laevigatus Torr. & A.Gray+
        swamp loosestrife, water-willow, whorled loosestrife
  Genus: Lythrum

    Lythrum alatum Pursh var. alatum *+
        winged loosestrife, winged lythrum
             Lythrum dacotanum Nieuwl.
    Lythrum salicaria L.*+
        purple loosestrife, spiked loosestrife
             Lythrum salicaria L. var. gracilior Turcz.
             Lythrum salicaria L. var. tomentosum (Mill.) DC.
             Lythrum salicaria L. var. vulgare DC.
  Genus: Rotala

    Rotala ramosior (L.) Koehne*+
        lowland rotala, tooth-cup, wheel-wort tooth-cup
             Ammannia catholica Cham. & Schltdl.
             Ammannia dentifera A.Gray
             Ammannia ramosior L.
             Rotala catholica (Cham. & Schltdl.) Leeuwen
             Rotala dentifera (A.Gray) Koehne
             Rotala ramosior (L.) Koehne var. interior Fernald & Griscom
             Rotala ramosior (L.) Koehne var. typica Fernald & Griscom
Family: Malvaceae
  Genus: Abutilon

    Abutilon theophrasti Medik.*+
        piemarker, velvet-leaf
             Abutilon abutilon (L.) Rusby
             Abutilon avicennae Gaertn.
  Genus: Alcea

    Alcea rosea L.*+
        hollyhock
             Alcea rosea L. var. sibthorpii Boiss.
             Althaea rosea (L.) Cav.
  Genus: Hibiscus

    Hibiscus trionum L.*+
        flower-of-an-hour
             Trionum trionum (L.) Wooton & Standl.
  Genus: Malva

    Malva crispa (L.) L.+
        curled mallow, curly mallow
             Malva verticillata L. var. crispa L.
    Malva moschata L.*+
        musk mallow
    Malva neglecta Wallr.*+
        cheeses, common mallow
             Malva rotundifolia auct. non L.
    Malva pusilla Sm.+
        low mallow
             Malva rotundifolia L.
    Malva sylvestris L.*+
        high mallow
             Malva mauritiana L.
             Malva sylvestris L. subsp. mauritiana
             Malva sylvestris L. var. mauritiana (L.) Boiss.
    Malva verticillata L.+
        cluster mallow, whorled mallow
  Genus: Napaea

    Napaea dioica L.*+
        glade mallow
             Napaea dioica L. f. stellata Fassett
Family: Melastomataceae
  Genus: Rhexia

    Rhexia virginica L.*+
        handsome-harry, Virginia meadow-beauty, wing-stem meadow-pitchers
             Rhexia purshii Spreng.
             Rhexia septemnervia Walter
             Rhexia stricta Pursh
             Rhexia virginica L. var. purshii (Spreng.) C.W.James
             Rhexia virginica L. var. septemnervia (Walter) Pursh
             Rhexia virginica L. var. virginica
Family: Menispermaceae
  Genus: Menispermum

    Menispermum canadense L.*+
        Canadian moonseed, common moonseed
Family: Menyanthaceae
  Genus: Menyanthes

    Menyanthes trifoliata L.*+
        bogbean, common buckbean
             Menyanthes trifoliata L. var. minor Raf.
Family: Molluginaceae
  Genus: Mollugo

    Mollugo verticillata L.*+
        carpetweed, green carpetweed, Indian chickweed
             Mollugo berteriana Ser.
Family: Monotropaceae
  Genus: Monotropa

    Monotropa uniflora L.*+
        Indian-pipe
             Monotropa brittonii Small
Family: Moraceae
  Genus: Fatoua

    Fatoua villosa (Thunb.) Nakai
        hairy crabweed
  Genus: Morus

    Morus alba L.*+
        Russian mulberry, white mulberry
             Morus alba L. f. incurva F.Seym.
             Morus alba L. var. tatarica (L.) Ser.
             Morus tatarica L.
    Morus rubra L.*+
        American mulberry, red mulberry
             Morus rubra L. f. atropurpurea F.Seym.
             Morus rubra L. f. laevis F.Seym.
             Morus rubra L. var. rubra
             Morus rubra L. var. tomentosa (Raf.) Bureau
             Morus tomentosa Raf.
Family: Najadaceae
  Genus: Najas

    Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt*+
        nodding water-nymph, northern water-nymph, slender naiad
             Caulinia flexilis Willd.
             Fluvialis flexilis (Willd.) Pers.
             Najas caespitosus (Maguire) Reveal
             Najas canadensis Michx.
             Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt subsp. caespitosus
             Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt var. congesta Farw.
             Najas flexilis (Willd.) Rostk. & W.L.E.Schmidt var. robusta Morong
Family: Nelumbonaceae
  Genus: Nelumbo

    Nelumbo lutea Willd.*+
        American lotus-lily, lotus, water-chinquapin
             Nelumbium luteum Willd. (orthographic error)
             Nelumbo nucifera Gaertn. subsp. lutea
             Nelumbo pentapetala sensu Fernald, non Nymphaea pentaphylla Walter
Family: Nyctaginaceae
  Genus: Mirabilis

    Mirabilis nyctaginea (Michx.) MacMill.*+
        heart-leaved umbrella-wort, wild four-o'clock
             Allionia nyctaginea Michx.
             Oxybaphus nyctagineus (Michx.) Sweet
Family: Nymphaeaceae
  Genus: Nuphar

    Nuphar variegata Durand*+
        bull-head pond-lily
             Nuphar advena (Aiton) W.T.Aiton var. fraterna (G.S.Mill. & Standl.) Standl.
             Nuphar fraterna (G.S.Mill. & Standl.) Standl.
             Nuphar lutea (L.) Sm. subsp. variegata
             Nymphaea americana G.S.Mill. & Standl.
             Nymphaea fraterna G.S.Mill. & Standl.
  Genus: Nymphaea

    Nymphaea odorata Aiton*+
        American white water-lily, fragrant water-lily
    Nymphaea odorata Aiton subsp. tuberosa*+
        American white water-lily, white water-lily
             Castalia tuberosa (Paine) Greene
             Nymphaea tuberosa Paine
Family: Oleaceae
  Genus: Fraxinus

    Fraxinus americana L.*+
        white ash
             Fraxinus americana L. f. iodocarpa Fernald
             Fraxinus americana L. var. americana
             Fraxinus americana L. var. biltmoreana (Beadle) J.Wright ex Fernald
             Fraxinus americana L. var. crassifolia Sarg.
             Fraxinus americana L. var. curtissii (Vasey) Small
             Fraxinus americana L. var. juglandifolia (Lam.) Rehder
             Fraxinus americana L. var. microcarpa A.Gray
             Fraxinus biltmoreana Beadle
             Fraxinus curtissii Vasey
             Fraxinus juglandifolia Lam.
    Fraxinus nigra Marshall*+
        black ash
    Fraxinus pennsylvanica Marshall*+
        green ash, red ash
             Fraxinus campestris Britton
             Fraxinus darlingtonii Britton
             Fraxinus juglandifolia Lam. var. subintegerrima Vahl
             Fraxinus lanceolata Borkh.
             Fraxinus pennsylvanica Marshall var. austinii Fernald
             Fraxinus pennsylvanica Marshall var. lanceolata (Borkh.) Sarg.
             Fraxinus pennsylvanica Marshall var. pennsylvanica
             Fraxinus pennsylvanica Marshall var. subintegerrima (Vahl) Fernald
             Fraxinus smallii Britton
  Genus: Ligustrum

    Ligustrum vulgare L.*+
        common privet, European privet
  Genus: Syringa

    Syringa josikaea J.Jacq. ex Rchb.
        Hungarian lilac
    Syringa reticulata (Blume) Hara
        Japanese tree lilac
    Syringa vulgaris L.*+
        common lilac
    Syringa X persica L. X
        Persian lilac
             Syringa persica L.
Family: Onagraceae
  Genus: Circaea

    Circaea alpina L. subsp. alpina*+
        alpine enchanter's-nightshade, northern enchanter's-nightshade, small enchanter's-nightshade
             Circaea alpina L. var. alpina
    Circaea lutetiana L. subsp. canadensis*+
        broad-leaf enchanter's-nightshade
             Circaea canadensis (L.) Hill
             Circaea canadensis (L.) Hill var. virginiana Fernald
             Circaea latifolia Hill
             Circaea lutetiana L. var. canadensis L.
             Circaea quadrisulcata (Maxim.) Franch. & Sav. subsp. canadensis
             Circaea quadrisulcata (Maxim.) Franch. & Sav. var. canadensis (L.) Hara
  Genus: Epilobium

    Epilobium angustifolium L. subsp. circumvagum*+
        fireweed, great willow-herb
             Epilobium angustifolium L. f. albiflorum (Dumort.) Hausskn.
             Epilobium angustifolium L. var. canescens A.W.Wood
    Epilobium ciliatum Raf. subsp. ciliatum*+
        American willow-herb, coast willow-weed, hairy willow-herb
             Epilobium adenocaulon Hausskn.
             Epilobium adenocaulon Hausskn. var. ecomosum (Fassett) Munz
             Epilobium adenocaulon Hausskn. var. holosericeum (Trel.) Munz
             Epilobium adenocaulon Hausskn. var. parishii (Trel.) Munz
             Epilobium adenocaulon Hausskn. var. perplexans Trel.
             Epilobium americanum Hausskn.
             Epilobium brevistylum Barbey
             Epilobium brevistylum Barbey var. ursinum (Parish ex Trel.) Jeps.
             Epilobium californicum Hausskn.
             Epilobium californicum Hausskn. var. holosericeum (Trel.) Munz
             Epilobium ciliatum Raf. var. ciliatum
             Epilobium ciliatum Raf. var. ecomosum (Fassett) B.Boivin
             Epilobium delicatum Trel.
             Epilobium ecomosum (Fassett) Fernald
             Epilobium glandulosum Lehm. var. adenocaulon (Hausskn.) Fernald
             Epilobium glandulosum Lehm. var. ecomosum Fassett
             Epilobium glandulosum Lehm. var. macounii (Trel.) C.L.Hitchc.
             Epilobium glandulosum Lehm. var. perplexans (Trel.) Fernald
             Epilobium holosericeum Trel.
             Epilobium leptocarpum Raf. var. macounii Trel.
             Epilobium parishii Trel.
             Epilobium ursinum Parish ex Trel.
             Epilobium watsonii Barbey var. parishii (Trel.) C.L.Hitchc.
    Epilobium coloratum Biehler*+
        cinnamon willow-herb, eastern willow-herb
    Epilobium leptophyllum Raf.*+
        American marsh willow-herb, bog willow-herb, fen willow-herb
             Epilobium densum Raf. var. nesophilum Fernald
             Epilobium molle Torr. var. sabulonense Fernald
             Epilobium nesophilum (Fernald) Fernald
             Epilobium nesophilum (Fernald) Fernald var. sabulonense Fernald
             Epilobium palustre L. var. gracile (Farw.) Dorn
             Epilobium palustre L. var. sabulonense (Fernald) B.Boivin
             Epilobium rosmarinifolium Pursh
             Epilobium treleaseanum H.Lév., pro parte
  Genus: Gaura

    Gaura biennis L.*+
        biennial bee-blossom, biennial gaura
             Gaura biennis L. var. biennis
    Gaura coccinea Nutt. ex Pursh+
        scarlet bee-blossom, scarlet gaura
             Gaura coccinea Nutt. ex Pursh var. arizonica Munz
             Gaura coccinea Nutt. ex Pursh var. epilobioides (Kunth) Munz
             Gaura coccinea Nutt. ex Pursh var. glabra (Lehm.) Munz
             Gaura coccinea Nutt. ex Pursh var. parvifolia (Torr.) Rickett
             Gaura coccinea Nutt. ex Pursh var. typica Munz
             Gaura epilobioides Kunth
             Gaura glabra Lehm.
             Gaura parvifolia Torr.
  Genus: Ludwigia

    Ludwigia palustris (L.) Elliott*+
        marsh purslane, marsh seed-box, water-purslane
             Isnardia palustris L., non Jussiaea palustris G.F.W.Mey.
             Isnardia palustris L. var. americana DC.
             Ludwigia palustris (L.) Elliott var. americana (DC.) Fernald & Griscom
             Ludwigia palustris (L.) Elliott f. elongata Fassett var. americana (DC.) Fernald & Griscom
             Ludwigia palustris (L.) Elliott var. nana Fernald & Griscom
             Ludwigia palustris (L.) Elliott var. pacifica Fernald & Griscom
    Ludwigia polycarpa Short & R.Peter*+
        false-loosestrife, top-pod water-primrose
  Genus: Oenothera

    Oenothera biennis L.*+
        bastard evening-primrose, common evening-primrose
             Oenothera biennis L. subsp. caeciarum
             Oenothera biennis L. subsp. centralis
             Oenothera biennis L. var. biennis
             Oenothera biennis L. var. pycnocarpa (G.F.Atk. & Bartlett) Wiegand
             Oenothera muricata L.
             Oenothera pycnocarpa G.F.Atk. & Bartlett
    Oenothera clelandii W.Dietr., P.H.Raven & W.L.Wagner*+
        Cleland's evening-primrose, sand evening-primrose
             Oenothera rhombipetala auct. non Nutt. ex Torr. & A.Gray
    Oenothera glazioviana Micheli+
        garden evening-primrose, red-sepal evening-primrose
             Oenothera erythrosepala Borbás
             Oenothera lamarckiana de Vries
    Oenothera oakesiana (A.Gray) J.W.Robbins ex S.Watson & Coult.+
        Oakes' evening-primrose
             Oenothera angustissima R.R.Gates
             Oenothera biennis L. var. oakesiana A.Gray
             Oenothera cruciata Nutt. ex G.Don var. stenopetala (E.P.Bicknell) Fernald
             Oenothera parviflora L. subsp. angustissima
             Oenothera parviflora L. var. angustissima (R.R.Gates) Wiegand
             Oenothera parviflora L. var. oakesiana (A.Gray) Fernald
             Oenothera stenopetala E.P.Bicknell
    Oenothera parviflora L.*+
        northern evening-primrose, small-flowered evening-primrose
             Oenothera cruciata Nutt. ex G.Don var. sabulonensis Fernald
             Oenothera cymatilis Bartlett
             Oenothera rubricapitata R.R.Gates
    Oenothera perennis L.*+
        small evening-primrose, small sundrops
             Kneiffia perennis (L.) Pennell
             Kneiffia pumila (L.) Spach
             Oenothera perennis L. var. rectipilis (S.F.Blake) S.F.Blake
             Oenothera perennis L. var. typica Munz
             Oenothera pumila L.
             Oenothera pumila L. var. rectipilis S.F.Blake
    Oenothera pilosella Raf. subsp. pilosella*+
        meadow evening-primrose, meadow sundrops, prairie sundrops
             Kneiffia pilosella (Raf.) A.Heller
             Kneiffia pratensis Small
             Kneiffia sumstinei Jenn.
    Oenothera villosa Thunb. subsp. villosa+
        hairy evening-primrose
             Oenothera albinervis R.R.Gates
             Oenothera biennis L. var. canescens Torr. & A.Gray
             Oenothera canovirens Steele
             Oenothera depressa Greene
             Oenothera strigosa (Rydb.) Mack. & Bush subsp. canovirens
             Oenothera villosa Thunb. subsp. canovirens
Family: Ophioglossaceae
  Genus: Botrychium

    Botrychium dissectum Spreng.*+
        cut-leaved grape fern, dissected grape fern, lace-frond grape fern
             Botrychium dissectum Spreng. f. dissectum
             Botrychium dissectum Spreng. f. elongatum (Gilbert & Haberer) Weath.
             Botrychium dissectum Spreng. f. obliquum (Muhl. ex Willd.) Fernald
             Botrychium dissectum Spreng. var. dissectum
             Botrychium dissectum Spreng. var. obliquum (Muhl. ex Willd.) Clute
             Botrychium dissectum Spreng. var. oblongifolium (E.W.Graves) M.Broun
             Botrychium obliquum Muhl. ex Willd.
             Botrychium obliquum Muhl. ex Willd. var. dissectum (Spreng.) Prantl
             Botrychium obliquum Muhl. ex Willd. var. elongatum Gilbert & Haberer
    Botrychium multifidum (S.G.Gmel.) Rupr.*+
        leathery grape fern, leather-leaved grape fern
             Botrychium californicum Underw.
             Botrychium coulteri Underw.
             Botrychium matricariae (Schrank) Spreng.
             Botrychium multifidum (S.G.Gmel.) Rupr. subsp. californicum
             Botrychium multifidum (S.G.Gmel.) Rupr. subsp. coulteri
             Botrychium multifidum (S.G.Gmel.) Rupr. subsp. silaifolium
             Botrychium multifidum (S.G.Gmel.) Rupr. var. californicum (Underw.) M.Broun
             Botrychium multifidum (S.G.Gmel.) Rupr. var. coulteri (Underw.) M.Broun
             Botrychium multifidum (S.G.Gmel.) Rupr. var. intermedium (D.C.Eaton) Farw.
             Botrychium multifidum (S.G.Gmel.) Rupr. var. robustum (Rupr.) C.Chr.
             Botrychium multifidum (S.G.Gmel.) Rupr. var. silaifolium (C.Presl) Broun
             Botrychium silaifolium C.Presl
             Botrychium silaifolium C.Presl var. coulteri (Underw.) Jeps.
             Botrychium ternatum (Thunb.) Sw. var. intermedium D.C.Eaton
             Osmunda multifida S.G.Gmel.
    Botrychium simplex E.Hitchc.*+
        least moonwort, little grape fern, small grape fern
             Botrychium simplex E.Hitchc. subsp. typicum
             Botrychium simplex E.Hitchc. var. laxifolium R.T.Clausen, non (R.T.Clausen) Fernald
             Botrychium simplex E.Hitchc. var. simplex
             Botrychium simplex E.Hitchc. var. tenebrosum (A.A.Eaton) R.T.Clausen
             Botrychium tenebrosum A.A.Eaton
    Botrychium virginianum (L.) Sw.*+
        rattlesnake fern
             Botrychium virginianum (L.) Sw. subsp. europaeum
             Botrychium virginianum (L.) Sw. var. europaeum Ĺngstr.
             Osmunda virginiana L.
  Genus: Ophioglossum

    Ophioglossum pusillum Raf.*+
        adder's-tongue, northern adder's-tongue
             Ophioglossum vulgatum auct. non L.
             Ophioglossum vulgatum L. var. alaskanum (E.Britton) C.Chr.
             Ophioglossum vulgatum L. var. pseudopodum (S.F.Blake) Farw.
Family: Orchidaceae
  Genus: Aplectrum

    Aplectrum hyemale (Muhl. ex Willd.) Torr.*+
        Adam-and-Eve, putty-root
             Aplectrum spicatum Britton, Sterns & Poggenb.
             Cymbidium hyemale Muhl. ex Willd.
  Genus: Calopogon

    Calopogon oklahomensis D.H.Goldman+
        Oklahoma grass pink
    Calopogon tuberosus (L.) Britton, Sterns & Poggenb. var. tuberosus *+
        grass pink, tuberous grass pink
             Calopogon pulchellus (Salisb.) R.Br.
             Calopogon pulchellus (Salisb.) R.Br. var. latifolius (H.St.John) Fernald
             Calopogon tuberosus (L.) Britton, Sterns & Poggenb. var. latifolius (H.St.John) B.Boivin
             Cathea pulchella Salisb.
             Cathea tuberosa (L.) Morong
             Cymbidium pulchellum (Salisb.) Sw.
             Helleborine tuberosa (L.) Kuntze
             Limodorum barbatum Lam.
             Limodorum pulchellum Salisb.
             Limodorum tuberosum L.
             Limodorum tuberosum L. var. nanum Nieuwl.
  Genus: Coeloglossum

    Coeloglossum viride (L.) Hartm. var. virescens (Muhl.) Luer*+
        long-bracted green orchid, frog orchid
             Coeloglossum bracteatum (Muhl.) Parl.
             Coeloglossum viride (L.) Hartm. subsp. bracteatum
             Habenaria bracteata (Muhl.) R.Br.
             Habenaria viridis (L.) R.Br. var. bracteata (Muhl.) A.Gray
             Orchis bracteata Muhl.
             Orchis virescens Muhl.
  Genus: Corallorhiza

    Corallorhiza maculata (Raf.) Raf.*+
        spotted coralroot, summer coralroot
    Corallorhiza odontorhiza (Willd.) Poir. var. odontorhiza *+
        autumn coralroot, fall coralroot, late coralroot, small-flowered coralroot
  Genus: Cypripedium

    Cypripedium acaule Aiton*+
        moccasin-flower, pink lady's-slipper, pink moccasin-flower, small pink lady's-slipper
             Cypripedium acaule Aiton f. albiflorum E.L.Rand & Redfield
             Fissipes acaulis (Aiton) Small
    Cypripedium candidum Muhl. ex Willd.*+
        small white lady's-slipper, white lady's-slipper
    Cypripedium parviflorum Salisb.+
        yellow lady's-slipper
             Cypripedium luteum Raf.
    Cypripedium parviflorum Salisb. var. makasin (Farw.) Sheviak*+
        small yellow lady's-slipper
             Cypripedium calceolus L. var. parviflorum auct. mult.
             Cypripedium pubescens Willd. var. makasin Farw.
    Cypripedium parviflorum Salisb. var. pubescens (Willd.) O.W.Knight*+
        large yellow lady's-slipper
             Cypripedium calceolus L. var. planipetalum (Fernald) Vict. & J.Rousseau
             Cypripedium calceolus L. var. pubescens (Willd.) Correll
             Cypripedium flavescens DC.
             Cypripedium parviflorum Salisb. var. planipetalum Fernald
             Cypripedium planipetalum (Fernald) F.Morris & E.A.Eames
             Cypripedium pubescens Willd.
             Cypripedium veganum Cockerell, P.Barker & M.Barker
    Cypripedium reginae Walter*+
        queen lady's-slipper, showy lady's-slipper
             Cypripedium hirsutum Mill.
             Cypripedium reginae Walter f. albolabium Fernald & B.G.Schub.
             Cypripedium reginae Walter f. reginae
             Cypripedium spectabile Salisb.
    Cypripedium X andrewsii A.M.Fuller X +
        Andrews' lady's-slipper
             Cypripedium X andrewsii A.M.Fuller var. landonii (Garay) B.Boivin (pro nm.) X
    Cypripedium X favillianum J.T.Curtis X +
        lady's-slipper
             Cypripedium X andrewsii A.M.Fuller var. favillianum (J.T.Curtis) B.Boivin (pro nm.) X
  Genus: Epipactis

    Epipactis helleborine (L.) Crantz*+
        broad-leaved helleborine, helleborine, helleborine orchid
             Amesia latifolia (L.) A.Nelson & J.F.Macbr.
             Epipactis latifolia (L.) All.
             Serapias helleborine L.
  Genus: Galearis

    Galearis spectabilis (L.) Raf.*+
        showy orchis
             Galeorchis spectabilis (L.) Rydb.
             Orchis spectabilis L.
  Genus: Goodyera

    Goodyera pubescens (Willd.) R.Br.*+
        downy rattlesnake-plantain
             Epipactis pubescens (Willd.) A.A.Eaton
             Neottia pubescens Willd.
             Peramium pubescens (Willd.) MacMill.
    Goodyera repens (L.) R.Br.*+
        creeping rattlesnake-plantain, lesser rattlesnake-plantain
             Epipactis repens (L.) Crantz var. ophioides (Fernald) A.A.Eaton
             Goodyera ophioides (Fernald) Rydb.
             Goodyera repens (L.) R.Br. subsp. ophioides
             Goodyera repens (L.) R.Br. var. ophioides Fernald
             Peramium ophioides (Fernald) Rydb.
             Peramium repens (L.) Salisb. var. ophioides (Fernald) A.Heller
             Satyrium repens L.
  Genus: Liparis

    Liparis liliifolia (L.) Rich. ex Lindl.*+
        brown wide-lip orchid, large twayblade, lily-leaved twayblade, mauve sleekwort, purple twayblade
             Leptorchis liliifolia (L.) Kuntze
             Liparis liliifolia (L.) Rich. ex Lindl. f. viridiflora Wadmond
             Malaxis correana W.P.C.Barton
             Malaxis liliifolia (L.) Sw.
             Malaxis longifolia W.P.C.Barton
             Ophrys liliifolia L.
             Ophrys trifolia Walter
    Liparis loeselii (L.) Rich.*+
        fen orchid, green twayblade, Loesel's twayblade
             Leptorchis loeselii (L.) MacMill.
             Liparis correana (W.P.C.Barton) Spreng.
             Ophrys loeselii L.
  Genus: Platanthera

    Platanthera clavellata (Michx.) Luer*+
        club-spur orchid, green woodland orchid, small green fringed orchid
             Denslovia clavellata (Michx.) Rydb.
             Gymnadeniopsis clavellata (Michx.) Rydb.
             Habenaria clavellata (Michx.) Spreng.
             Habenaria clavellata (Michx.) Spreng. var. ophioglossoides Fernald
             Habenaria clavellata (Michx.) Spreng. var. wrightii Olive
             Orchis clavellata Michx.
    Platanthera dilatata (Pursh) Lindl. ex Beck var. dilatata *+
        boreal bog orchid, leafy white orchis, scent-bottle, white bog orchid
             Habenaria dilatata (Pursh) Hook.
             Limnorchis dilatata (Pursh) Rydb.
             Orchis dilatata Pursh
             Platanthera dilatata (Pursh) Lindl. ex Beck var. angustifolia Hook.
    Platanthera flava (L.) Lindl. var. herbiola (R.Br.) Luer*+
        pale green orchid, tubercled orchid
             Habenaria flava (L.) R.Br. ex Spreng. var. herbiola (R.Br.) Ames & Correll
             Habenaria herbiola R.Br.
    Platanthera huronensis (Nutt.) Lindl.*+
        Huron green orchid, tall nothern bog orchid
             Habenaria dilatata (Pursh) Hook. var. media (Rydb.) Ames
             Habenaria huronensis (Nutt.) Spreng.
             Habenaria hyperborea (L.) R.Br. var. huronensis (Nutt.) Farw.
             Habenaria X media (Rydb.) G.Niles (pro sp.)
             Limnorchis huronensis (Nutt.) Rydb.
             Limnorchis media Rydb.
             Orchis huronensis Nutt.
             Platanthera hyperborea (L.) Lindl. var. huronensis (Nutt.) Luer
             Platanthera hyperborea (L.) Lindl. var. major Lange
             Platanthera X media (Rydb.) Luer (pro sp.) X
    Platanthera lacera (Michx.) G.Don*+
        green fringed orchid, ragged fringed orchid
             Blephariglottis lacera (Michx.) Farw.
             Habenaria lacera (Michx.) R.Br.
             Orchis lacera Michx.
             Platanthera lacera (Michx.) G.Don var. lacera
    Platanthera leucophaea (Nutt.) Lindl.*+
        eastern prairie fringed orchid, prairie white fringed orchid
             Blephariglottis leucophaea (Nutt.) Farw.
             Habenaria leucophaea (Nutt.) A.Gray
             Habenaria leucophaea (Nutt.) A.Gray var. leucophaea
             Orchis leucophaea Nutt.
    Platanthera psycodes (L.) Lindl.*+
        lesser purple fringed orchid
             Blephariglottis psycodes (L.) Rydb.
             Habenaria psycodes (L.) Spreng.
             Habenaria psycodes (L.) Spreng. var. psycodes
             Orchis psycodes L.
  Genus: Pogonia

    Pogonia ophioglossoides (L.) Ker Gawl.*+
        adder's-mouth, rose pogonia, snakemouth orchid
             Arethusa ophioglossoides L.
             Pogonia ophioglossoides (L.) Ker Gawl. f. albiflora E.L.Rand & Redfield
             Pogonia ophioglossoides (L.) Ker Gawl. f. ophioglossoides
             Pogonia ophioglossoides (L.) Juss. var. brachypogon Fernald
  Genus: Spiranthes

    Spiranthes casei Catling & Cruise var. casei *+
        Case's lady's-tresses
             Spiranthes X intermedia auct. non Ames X
    Spiranthes cernua (L.) Rich.*+
        nodding lady's-tresses
             Gyrostachys cernua (L.) Kuntze
             Ibidium cernuum (L.) House
             Ophrys cernua L.
             Spiranthes cernua (L.) Rich. var. incurva Jenn.
    Spiranthes lacera (Raf.) Raf. var. gracilis (Bigelow) Luer+
        slender lady's-tresses
             Gyrostachys gracilis (Bigelow) Kuntze
             Ibidium beckii (Lindl.) House
             Ibidium gracile (Bigelow) House
             Neottia gracilis Bigelow
             Spiranthes beckii Lindl.
             Spiranthes gracilis (Bigelow) L.C.Beck
    Spiranthes lacera (Raf.) Raf. var. lacera +
        northern slender lady's-tresses
             Neottia lacera Raf.
    Spiranthes magnicamporum Sheviak*+
        Great Plains lady's-tresses
Family: Orobanchaceae
  Genus: Orobanche

    Orobanche uniflora L.*+
        cancer-root, naked broom-rape, one-flowered broom-rape
             Anoplanthus uniflorus (L.) Endl.
             Aphyllon minutum Suksd.
             Aphyllon sedii Suksd.
             Aphyllon uniflorum (L.) A.Gray
             Aphyllon uniflorum (L.) A.Gray var. occidentale Greene
             Orobanche porphyrantha Beck
             Orobanche purpurea Jacq.
             Orobanche sedii (Suksd.) Fernald
             Orobanche terrae-novae Fernald
             Orobanche uniflora L. subsp. occidentalis
             Orobanche uniflora L. var. minuta (Suksd.) Beck
             Orobanche uniflora L. var. occidentalis (Greene) Roy L.Taylor & MacBryde
             Orobanche uniflora L. var. purpurea (A.Heller) Achey
             Orobanche uniflora L. var. sedii (Suksd.) Achey
             Orobanche uniflora L. var. terrae-novae (Fernald) Munz
             Orobanche uniflora L. var. typica Achey
             Orobanche uniflora L. var. uniflora
             Thalesia purpurea A.Heller
             Thalesia uniflora (L.) Britton
Family: Osmundaceae
  Genus: Osmunda

    Osmunda cinnamomea L.*+
        cinnamon fern
             Osmunda cinnamomea L. f. frondosa (Torr. & A.Gray) Britton
             Osmunda cinnamomea L. f. incisa (Huntington) Gilbert
             Osmunda cinnamomea L. var. cinnamomea
             Osmunda cinnamomea L. var. frondosa Torr. & A.Gray
             Osmunda cinnamomea L. var. glandulosa Waters
    Osmunda claytoniana L.*+
        interrupted fern
    Osmunda regalis L. var. spectabilis (Willd.) A.Gray*+
        American royal fern, flowering fern, royal fern
             Osmunda spectabilis Willd.
Family: Oxalidaceae
  Genus: Oxalis

    Oxalis corniculata L.+
        creeping yellow wood-sorrel
             Acetosella corniculata (L.) Kuntze
             Oxalis corniculata L. var. atropurpurea Planch.
             Oxalis corniculata L. var. langloisii (Small) Wiegand
             Oxalis corniculata L. var. lupulina (Kunth) Zucc.
             Oxalis corniculata L. var. macrophylla Arsčne ex R.Knuth
             Oxalis corniculata L. var. minor Laing
             Oxalis corniculata L. var. reptans Laing
             Oxalis corniculata L. var. villosa (M.Bieb.) Hohen.
             Oxalis corniculata L. var. viscidula Wiegand
             Oxalis langloisii (Small) Fedde
             Oxalis lupulina Kunth
             Oxalis pusilla Salisb.
             Oxalis repens Thunb.
             Oxalis villosa M.Bieb.
             Xanthoxalis corniculata (L.) Small
             Xanthoxalis corniculata (L.) Small var. atropurpurea (Planch.) Moldenke
             Xanthoxalis langloisii Small
             Xanthoxalis repens (Thunb.) Moldenke
    Oxalis dillenii Jacq.+
        Dillenius' oxalis, southern yellow wood-sorrel
             Oxalis corniculata L. var. dillenii (Jacq.) Trel.
             Oxalis dillenii Jacq. subsp. dillenii
             Oxalis dillenii Jacq. var. radicans Shinners
             Oxalis rupestris Raf.
             Oxalis stricta L., sensu Lourteig (1979) & Voss (1985)
             Xanthoxalis dillenii (Jacq.) Holub
    Oxalis montana Raf.*+
        mountain wood-sorrel
             Oxalis acetosella auct. non L.
             Oxalis acetosella L. subsp. montana
             Oxalis acetosella L. var. rhodantha (Fernald) R.Knuth
             Oxalis montana Raf. f. rhodantha Fernald
    Oxalis stricta L.*+
        common yellow oxalis, tall wood-sorrel
             Ceratoxalis coloradensis (Rydb.) Lunell
             Ceratoxalis cymosa (Small) Lunell
             Oxalis bushii Small
             Oxalis coloradensis Rydb.
             Oxalis europaea Jord.
             Oxalis europaea Jord. f. cymosa (Small) Wiegand
             Oxalis europaea Jord. f. pilosella Wiegand
             Oxalis europaea Jord. f. subglabrata Wiegand
             Oxalis europaea Jord. f. villicaulis Wiegand
             Oxalis europaea Jord. var. bushii (Small) Wiegand
             Oxalis europaea Jord. f. vestita Wiegand var. bushii (Small) Wiegand
             Oxalis europaea Jord. var. rufa (Small) Young
             Oxalis fontana Bunge
             Oxalis fontana Bunge var. bushii (Small) Hara
             Oxalis interior (Small) Fedde
             Oxalis rufa Small
             Oxalis stricta L. var. decumbens Bitter
             Oxalis stricta L. var. piletocarpa Wiegand
             Oxalis stricta L. var. rufa (Small) Farw.
             Oxalis stricta L. var. villicaulis (Wiegand) Farw.
             Oxalis cymosa Small
             Xanthoxalis bushii (Small) Small
             Xanthoxalis coloradensis (Rydb.) Rydb.
             Xanthoxalis cymosa (Small) Small
             Xanthoxalis dillenii (Jacq.) Holub var. piletocarpa (Wiegand) Holub
             Xanthoxalis interior Small
             Xanthoxalis rufa (Small) Small
             Xanthoxalis stricta (L.) Small
             Xanthoxalis stricta (L.) Small var. piletocarpa (Wiegand) Moldenke
    Oxalis violacea L.*+
        violet wood-sorrel
             Ionoxalis violacea (L.) Small
             Oxalis violacea L. f. albida Fassett
             Oxalis violacea L. var. trichophora Fassett
Family: Papaveraceae
  Genus: Chelidonium

    Chelidonium majus L.*+
        greater celandine
  Genus: Eschscholzia

    Eschscholzia californica Cham.*+
        California poppy
  Genus: Papaver

    Papaver rhoeas L.*+
        corn poppy, Flander's poppy, Shirley's poppy
  Genus: Sanguinaria

    Sanguinaria canadensis L.*+
        bloodroot
             Sanguinaria australis Greene
             Sanguinaria canadensis L. var. rotundifolia (Greene) Fedde
             Sanguinaria dilleniana Greene
             Sanguinaria rotundifolia Greene
Family: Pedaliaceae
  Genus: Sesamum

    Sesamum indicum L.*+
        sesame
Family: Phytolaccaceae
  Genus: Phytolacca

    Phytolacca acinosa Roxb.*+
        edible pokeweed, Indian pokeweed
             Phytolacca esculenta Van Houtte
    Phytolacca americana L. var. americana *+
        American pokeberry, pokeweed
             Phytolacca decandra L.
Family: Pinaceae
  Genus: Abies

    Abies balsamea (L.) Mill.*+
        balsam fir, Canada balsam
             Pinus balsamea L.
  Genus: Larix

    Larix decidua Mill.*
        European larch
    Larix laricina (Du Roi) K.Koch*+
        larch, tamarack
             Larix alaskensis W.Wight
             Larix laricina (Du Roi) K.Koch var. alaskensis (W.Wight) Raup
             Pinus laricina Du Roi
  Genus: Picea

    Picea abies (L.) H.Karst.*+
        Norway spruce
             Picea excelsa (Lamb.) Link
             Pinus abies L.
    Picea glauca (Moench) Voss*+
        white spruce
             Abies canadensis Mill.
             Picea alba (Aiton) Link
             Picea albertiana S.Br.
             Picea canadensis (Mill.) Britton, Sterns & Poggenb.
             Picea canadensis (Mill.) Britton, Sterns & Poggenb. var. glauca (Moench) Sudw.
             Picea glauca (Moench) Voss var. albertiana (S.Br.) Sarg.
             Picea glauca (Moench) Voss var. densata L.H.Bailey
             Picea glauca (Moench) Voss var. porsildii Raup
             Pinus alba Aiton
             Pinus glauca Moench
    Picea mariana (Mill.) Britton, Sterns & Poggenb.*+
        black spruce
             Abies mariana Mill.
             Picea mariana (Mill.) Britton, Sterns & Poggenb. var. mariana
  Genus: Pinus

    Pinus resinosa Aiton*+
        Canadian pine, Norway pine, red pine
    Pinus strobus L.*+
        eastern white pine
             Strobus strobus (L.) Small
  Genus: Tsuga

    Tsuga canadensis (L.) Carričre*+
        eastern hemlock, hemlock, northern hemlock
             Pinus canadensis L.
Family: Plantaginaceae
  Genus: Plantago

    Plantago aristata Michx.+
        bracted plantain, buck-horn, large-bracted plantain
             Plantago aristata Michx. var. nuttallii (Rapin) E.Morris
             Plantago filiformis Decne.
             Plantago frankii Steud.
             Plantago nuttallii Rapin
             Plantago patagonica Jacq. var. aristata (Michx.) A.Gray
             Plantago purshii Roem. & Schult. var. aristata (Michx.) M.E.Jones
             Plantago squarrosa Nutt.
             Plantago squamosa Nutt. ex Decne.
    Plantago lanceolata L.*+
        English plantain, narrow-leaved plantain, plantain, ribgrass
             Plantago altissima auct. non L.
             Plantago lanceolata L. var. angustifolia Poir.
             Plantago lanceolata L. var. sphaerostachya Mert. & W.D.J.Koch
    Plantago major L.*+
        broad-leaved plantain, common plantain, plantain
             Plantago major L. var. scopulorum Fr. & Broberg
    Plantago patagonica Jacq.*+
        woolly plantain
             Plantago gnaphalioides Nutt.
             Plantago oblonga E.Morris
             Plantago patagonica Jacq. var. breviscapa (Shinners) Shinners
             Plantago patagonica Jacq. var. gnaphalioides (Nutt.) A.Gray
             Plantago patagonica Jacq. var. oblonga (E.Morris) Shinners
             Plantago patagonica Jacq. var. spinulosa (Decne.) A.Gray
             Plantago picta E.Morris
             Plantago purshii Roem. & Schult.
             Plantago purshii Roem. & Schult. var. breviscapa Shinners
             Plantago purshii Roem. & Schult. var. oblonga (E.Morris) Shinners
             Plantago purshii Roem. & Schult. var. picta (E.Morris) Pilg.
             Plantago purshii Roem. & Schult. var. spinulosa (Decne.) Shinners
             Plantago spinulosa Decne.
             Plantago wyomingensis Gand.
    Plantago psyllium L.+
        leafy-stemmed plantain, psyllium, whorled plantain
             Plantago arenaria Waldst. & Kit.
             Plantago indica L.
             Plantago scabra Moench
    Plantago rugelii Decne.*+
        American plantain, black-seeded plantain, red-stalked plantain, Rugel's plantain
             Plantago rugelii Decne. var. alterniflora Farw.
             Plantago rugelii Decne. var. aspera Farw.
    Plantago virginica L.+
        dwarf plantain, pale-seed plantain, Virginia plantain
             Plantago accendens Raf.
             Plantago caroliniana Walter
             Plantago connivens Moench
             Plantago ludoviciana Raf.
             Plantago missouriensis Steud.
             Plantago purpurascens Nutt. ex Rapin
             Plantago virginica L. var. viridescens Fernald
Family: Platanaceae
  Genus: Platanus

    Platanus occidentalis L.*+
        American plane-tree, sycamore
             Platanus glabrata Fernald
             Platanus occidentalis L. f. attenuata Sarg.
             Platanus occidentalis L. var. glabrata (Fernald) Sarg.
Family: Poaceae
  Genus: Agropyron

    Agropyron desertorum (Fisch. ex Link) Schult.*+
        desert wheat grass
             Agropyron cristatum (L.) Gaertn. subsp. desertorum
             Agropyron cristatum (L.) Gaertn. var. desertorum (Fisch. ex Link) Dorn
             Triticum desertorum Fisch. ex Link
  Genus: Agrostis

    Agrostis gigantea Roth*+
        redtop
             Agrostis alba auct. non L.
             Agrostis gigantea Roth var. dispar (Michx.) Philipson
             Agrostis gigantea Roth var. ramosa (S.F.Gray) Philipson
             Agrostis nigra With.
             Agrostis stolonifera L. subsp. gigantea
             Agrostis stolonifera L. var. major (Gaudin) Farw.
    Agrostis hyemalis (Walter) Britton, Sterns & Poggenb.*+
        southern hair grass, tickle grass, winter bent grass
    Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. var. hyemalis +
        southern hair grass, tickle grass, winter bent grass
             Agrostis antecedens E.P.Bicknell
             Cornucopiae hyemalis Walter
    Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. var. scabra (Willd.) Blomq.*+
        rough bent grass, southern hair grass, tickle grass
             Agrostis hyemalis (Walter) Britton, Sterns & Poggenb. var. tenuis (Tuck.) Gleason
             Agrostis scabra Willd.
             Agrostis scabra Willd. var. scabra
    Agrostis stolonifera L.+
        creeping bent grass, creeping tickle grass
    Agrostis stolonifera L. var. palustris (Huds.) Farw.+
        creeping bent grass, creeping tickle grass
             Agrostis alba L. var. palustris (Huds.) Pers.
             Agrostis palustris Huds.
             Agrostis stolonifera L. var. compacta Hartm.
    Agrostis stolonifera L. var. stolonifera *+
        creeping bent grass, creeping tickle grass
             Agrostis alba L. var. stolonifera (L.) Sm.
             Agrostis maritima Lam.
  Genus: Alopecurus

    Alopecurus aequalis Sobol.*+
        short-awned foxtail
             Alopecurus aequalis Sobol. var. aequalis
             Alopecurus aequalis Sobol. var. natans (Wahlenb.) Fernald
             Alopecurus aristulatus Michx.
             Alopecurus geniculatus L. var. aristulatus (Michx.) Torr.
    Alopecurus carolinianus Walter*+
        annual foxtail, Carolina foxtail
             Alopecurus macounii Vasey
             Alopecurus ramosus Poir.
    Alopecurus pratensis L.*+
        meadow foxtail
  Genus: Andropogon

    Andropogon gerardii Vitman*+
        big blue-stem, turkey-foot
             Andropogon furcatus Muhl. ex Willd.
             Andropogon provincialis Lam.
  Genus: Aristida

    Aristida basiramea Engelm. ex Vasey*+
        fork-tip three-awn grass
             Aristida basiramea Engelm. ex Vasey var. basiramea
    Aristida dichotoma Michx. var. curtissii A.Gray+
        Curtiss's three-awn, church-mouse three-awn
             Aristida basiramea Engelm. ex Vasey var. curtissii (A.Gray) Shinners
             Aristida curtissii (A.Gray) Nash
    Aristida longespica Poir. var. geniculata (Raf.) Fernald*+
        Kearney's three-awn, red three-awn, slender three-awn, slim-spike three-awn grass
             Aristida geniculata Raf.
             Aristida intermedia Scribn. & Ball
             Aristida necopina Shinners
    Aristida oligantha Michx.*+
        old-field three-awn, plains three-awn grass
    Aristida purpurascens Poir. var. purpurascens *+
        arrow-feather, arrow-feather three-awn
    Aristida tuberculosa Nutt.*+
        beach three-awn, dune three-awn grass, seaside three-awn
  Genus: Arrhenatherum

    Arrhenatherum elatius (L.) P.Beauv. ex J.Presl & C.Presl var. elatius *+
        tall oat grass
             Avena elatior L.
  Genus: Avena

    Avena sativa L.*+
        oats
             Avena byzantina K.Koch
             Avena fatua L. subsp. sativa
             Avena fatua L. var. sativa (L.) Hausskn.
             Avena sativa L. var. orientalis (Schreb.) Alef.
  Genus: Bouteloua

    Bouteloua curtipendula (Michx.) Torr. var. curtipendula *+
        side-oats grama
             Atheropogon curtipendulus (Michx.) E.Fourn.
             Chloris curtipendula Michx.
    Bouteloua gracilis (Kunth) Lag. ex Griffiths*+
        blue grama, eyelash grass, graceful grama grass
             Bouteloua gracilis (Kunth) Lag. ex Griffiths var. stricta (Vasey) Hitchc.
             Bouteloua oligostachya (Nutt.) Torr. ex A.Gray
             Chondrosum gracile Willd. ex Kunth
             Chondrosum oligostachyum (Nutt.) Torr.
    Bouteloua hirsuta Lag. subsp. hirsuta*+
        hairy grama, hairy grama grass
             Bouteloua hirsuta Lag. var. hirsuta
             Bouteloua hirsuta Lag. var. palmeri Vasey ex Beal
             Chondrosum hirsutum (Lag.) Kunth
  Genus: Brachyelytrum

    Brachyelytrum erectum (Schreb. ex Spreng.) P.Beauv.*+
        bearded shorthusk, long-awned wood grass
             Brachyelytrum erectum (Schreb. ex Spreng.) P.Beauv. var. erectum
  Genus: Briza

    Briza maxima L.*
        big quaking grass
  Genus: Bromus

    Bromus altissimus Pursh*+
        ear-leaved brome
             Bromus ciliatus sensu Baum, non L.
             Bromus latiglumis (Shear) Hitchc.
             Bromus latiglumis (Shear) Hitchc. f. incanus (Shear) Fernald
             Bromus purgans sensu Wagnon, non L.
    Bromus ciliatus L.*+
        fringed brome
             Bromopsis ciliata (L.) Holub
             Bromus ciliatus L. f. ciliatus
             Bromus ciliatus L. f. denudatus Wiegand
             Bromus ciliatus L. var. ciliatus
             Bromus ciliatus L. var. denudatus (Wiegand) Fernald
             Bromus ciliatus L. var. genuinus Fernald
             Bromus ciliatus L. var. intonsus Fernald
             Bromus dudleyi Fernald
    Bromus commutatus Schrad.*+
        European brome, hairy chess, meadow brome
             Bromus commutatus Schrad. var. apricorum Simonk.
    Bromus inermis Leyss.*+
        Hungarian brome, smooth brome
             Bromus inermis Leyss. f. aristatus (Schur) Fernald
             Bromus inermis Leyss. f. inermis
             Bromus inermis Leyss. f. villosus (Mert. & W.D.J.Koch) Fernald
             Bromus inopinatus Brues
    Bromus japonicus Thunb. ex Murray*+
        Japanese chess
             Bromus japonicus Thunb. ex Murray var. porrectus Hack.
             Bromus patulus Mert. & W.D.J.Koch
    Bromus kalmii A.Gray*+
        Arctic brome, ear-leaved brome, Kalm's brome, prairie brome
             Bromus ciliatus L. var. laeviglumis Scribn. ex Shear
             Bromopsis kalmii (A.Gray) Holub
             Bromus purgans L., nom. rejic.
             Bromus purgans L. var. laeviglumis (Scribn. ex Shear) Swallen
    Bromus pubescens Muhl. ex Willd.*+
        Canadian brome, hairy woodland brome
             Bromopsis pubescens (Muhl. ex Willd.) Holub
             Bromus purgans auct. mult. non L.
             Bromus purgans L. f. glabriflorus Wiegand
             Bromus purgans L. f. laevivaginatus Wiegand
    Bromus secalinus L.*+
        brome grass, cheat, chess, rye brome
             Bromus secalinus L. var. hirsutus Kindb.
             Bromus secalinus L. var. hirtus (F.W.Schultz) Hegi
    Bromus tectorum L.*+
        cheat grass, downy brome, downy chess, June grass
    Bromus tectorum L. var. tectorum +
        cheat grass, downy brome, downy chess, June grass
  Genus: Calamagrostis

    Calamagrostis canadensis (Michx.) P.Beauv.*+
        blue-joint grass
    Calamagrostis canadensis (Michx.) P.Beauv. var. canadensis +
        big reed grass, blue-joint grass
             Calamagrostis anomala Suksd.
             Calamagrostis atropurpurea Nash
             Calamagrostis canadensis (Michx.) P.Beauv. var. acuminata Vasey ex Shear & Rydb.
             Calamagrostis canadensis (Michx.) P.Beauv. var. pallida (Vasey & Scribn.) Stebbins
             Calamagrostis canadensis (Michx.) P.Beauv. var. robusta Vasey
             Calamagrostis canadensis (Michx.) P.Beauv. var. typica Stebbins
             Calamagrostis expansa Rickett & Gilly var. robusta (Vasey) Stebbins
             Calamagrostis inexpansa A.Gray var. cuprea Kearney
             Calamagrostis inexpansa A.Gray var. robusta (Vasey) Stebbins
    Calamagrostis stricta (Timm) Koeler subsp. inexpansa*+
        New England northern reed grass, northern reed grass, slim-stem reed grass
             Calamagrostis californica Kearney
             Calamagrostis chordorrhiza Porsild
             Calamagrostis expansa Rickett & Gilly
             Calamagrostis fernaldii Louis-Marie
             Calamagrostis hyperborea Lange var. americana (Vasey) Kearney
             Calamagrostis hyperborea Lange var. elongata Kearney
             Calamagrostis hyperborea Lange var. stenodes Kearney
             Calamagrostis inexpansa A.Gray
             Calamagrostis inexpansa A.Gray var. barbulata Kearney
             Calamagrostis inexpansa A.Gray var. brevior (Vasey) Stebbins
             Calamagrostis inexpansa A.Gray var. novae-angliae Stebbins
             Calamagrostis labradorica Kearney
             Calamagrostis lacustris (Kearney) Nash
             Calamagrostis lapponica (Wahlenb.) Hartm. var. brevipilis Stebbins
             Calamagrostis pickeringii A.Gray var. lacustris (Kearney) Hitchc.
             Calamagrostis scopulorum M.E.Jones var. bakeri Stebbins
             Calamagrostis stricta (Timm) Koeler var. brevior Vasey
             Calamagrostis stricta (Timm) Koeler var. lacustris (Kearney) C.W.Greene
    Calamagrostis stricta (Timm) Koeler var. stricta subsp. stricta+
        slim-stem reed grass, slim-stem small reed grass
             Calamagrostis neglecta Gaertn., B.Mey. & Scherb.
             Calamagrostis neglecta Gaertn., B.Mey. & Scherb. subsp. stricta
             Calamagrostis neglecta Gaertn., B.Mey. & Scherb. var. gracilis (Scribn.) Scribn.
             Calamagrostis neglecta Gaertn., B.Mey. & Scherb. var. micrantha (Kearney) Stebbins
  Genus: Calamovilfa

    Calamovilfa longifolia (Hook.) Scribn. var. longifolia +
        prairie sand-reed
  Genus: Cenchrus

    Cenchrus longispinus (Hack.) Fernald*+
        field sandbur, innocent-weed, mat sandbur, sandbur
  Genus: Cinna

    Cinna arundinacea L.*+
        common wood-reed, sweet wood-reed, stout wood-reed
             Cinna arundinacea L. var. arundinacea
             Cinna arundinacea L. var. inexpansa Fernald & Griscom
  Genus: Dactylis

    Dactylis glomerata L.*+
        orchard grass
  Genus: Danthonia

    Danthonia spicata (L.) P.Beauv. ex Roem. & Schult.*+
        poverty danthonia, poverty grass, poverty oat grass
             Danthonia spicata (L.) P.Beauv. ex Roem. & Schult. var. longipila Scribn. & Merr.
             Danthonia spicata (L.) P.Beauv. ex Roem. & Schult. var. pinetorum Piper
             Danthonia thermalis Scribn.
  Genus: Dichanthelium

    Dichanthelium acuminatum (Sw.) Gould & C.A.Clark+
        hairy panic grass
             Panicum acuminatum Sw.
             Panicum acuminatum Sw. X P. columbianum Scribn.
             Panicum lanuginosum Elliott, non Bosc ex Spreng.
    Dichanthelium acuminatum (Sw.) Gould & C.A.Clark subsp. columbianum*+
        hemlock panic grass
             Dichanthelium columbianum (Scribn.) Freckmann
             Dichanthelium sabulorum (Lam.) Gould & C.A.Clark var. thinium (Hitchc. & Chase) Gould & C.A.Clark
             Panicum acuminatum Sw. var. columbianum (Scribn.) Lelong
             Panicum columbianum Scribn.
             Panicum heterophyllum Bosc ex Nees
             Panicum sabulorum Lam. var. thinium (Hitchc. & Chase) C.F.Reed
             Panicum tsugetorum Nash
             Panicum unciphyllum Trin. var. thinium Hitchc. & Chase
    Dichanthelium acuminatum (Sw.) Gould & C.A.Clark subsp. fasciculatum+
        western panic grass
             Dichanthelium acuminatum (Sw.) Gould & C.A.Clark var. fasciculatum (Torr.) Freckmann
             Dichanthelium lanuginosum (Elliott) Gould var. fasciculatum (Torr.) Spellenb.
             Panicum acuminatum Sw. var. fasciculatum (Torr.) Lelong
             Panicum brodiei H.St.John
             Panicum glutinoscabrum Fernald
             Panicum huachucae Ashe
             Panicum huachucae Ashe var. fasciculatum (Torr.) F.T.Hubb.
             Panicum languidum Hitchc.
             Panicum lanuginosum Elliott, non Bosc ex Spreng. var. fasciculatum (Torr.) Fernald
             Panicum lanuginosum Elliott, non Bosc ex Spreng. var. huachucae (Ashe) Hitchc.
             Panicum lanuginosum Elliott, non Bosc ex Spreng. var. septentrionale (Fernald) Fernald
             Panicum lanuginosum Elliott, non Bosc ex Spreng. var. tennesseense (Ashe) Gleason
             Panicum lassenianum Schmoll
             Panicum lindheimeri Nash var. fasciculatum (Torr.) Fernald
             Panicum occidentale Scribn.
             Panicum pacificum Hitchc. & Chase
             Panicum subvillosum Ashe
             Panicum tennesseense Ashe
    Dichanthelium acuminatum (Sw.) Gould & C.A.Clark subsp. implicatum*+
        mat panic grass
             Dichanthelium acuminatum (Sw.) Gould & C.A.Clark var. implicatum (Scribn.) Gould & C.A.Clark
             Dichanthelium meridionale (Ashe) Freckmann
             Panicum acuminatum Sw. var. implicatum (Scribn.) C.F.Reed
             Panicum albemarlense Ashe
             Panicum columbianum Scribn. var. oricola (Hitchc. & Chase) Fernald
             Panicum columbianum Scribn. var. thinium Hitchc. & Chase
             Panicum heterophyllum Bosc ex Nees var. thinium (Hitchc. & Chase) F.T.Hubb.
             Panicum implicatum Scribn.
             Panicum lanuginosum Elliott, non Bosc ex Spreng. var. implicatum (Scribn.) Fernald
             Panicum leucothrix Nash, sensu Gleason & Cronquist (1991)
             Panicum meridionale Ashe
             Panicum meridionale Ashe var. albemarlense (Ashe) Fernald
             Panicum oricola Hitchc. & Chase
    Dichanthelium acuminatum (Sw.) Gould & C.A.Clark subsp. lindheimeri+
        Lindheimer's panic grass
             Dichanthelium acuminatum (Sw.) Gould & C.A.Clark var. lindheimeri (Nash) Gould & C.A.Clark
             Dichanthelium lanuginosum (Elliott) Gould var. lindheimeri (Nash) Fernald
             Dichanthelium lindheimeri (Nash) Gould
             Panicum acuminatum Sw. var. lindheimeri (Nash) Lelong
             Panicum lanuginosum Elliott, non Bosc ex Spreng. var. lindheimeri (Nash) Fernald
             Panicum lindheimeri Nash
    Dichanthelium boreale (Nash) Freckmann*+
        northern panic grass
             Panicum bicknellii Nash
             Panicum bicknellii Nash var. bushii (Nash) Farw.
             Panicum boreale Nash
             Panicum boreale Nash var. michiganense Farw.
             Panicum bushii Nash
             Panicum calliphyllum Ashe
    Dichanthelium depauperatum (Muhl.) Gould*+
        poverty panic grass, starved panic grass
             Panicum depauperatum Muhl.
             Panicum depauperatum Muhl. var. depauperatum
             Panicum depauperatum Muhl. var. involutum (Torr.) A.W.Wood
             Panicum depauperatum Muhl. var. psilophyllum Fernald
             Panicum strictum Pursh var. psilophyllum (Fernald) Farw.
    Dichanthelium dichotomum (L.) Gould*+
        forked panic grass
             Panicum barbulatum Michx.
             Panicum caerulescens Hack. ex Hitchc.
             Panicum dichotomum L.
             Panicum dichotomum L. var. barbulatum (Michx.) A.W.Wood
    Dichanthelium latifolium (L.) Harvill*+
        broad-leaved panic grass
             Panicum latifolium L.
             Panicum macrocarpon Leconte ex Torr.
    Dichanthelium leibergii (Vasey) Freckmann*+
        Leiberg's panic grass, prairie panic grass
             Panicum leibergii (Vasey) Scribn.
             Panicum scoparium Lam. var. leibergii Vasey
             Panicum scribnerianum Nash var. leibergii (Vasey) Scribn.
    Dichanthelium linearifolium (Scribn.) Gould*+
        linear-leaved panic grass, slender-leaved panic grass
             Dichanthelium linearifolium (Scribn.) Gould var. werneri (Scribn.) Mohlenbr.
             Panicum linearifolium Scribn.
             Panicum linearifolium Scribn. var. linearifolium
             Panicum linearifolium Scribn. var. werneri (Scribn.) Fernald
             Panicum strictum Pursh var. linearifolium (Scribn.) Farw.
             Panicum werneri Scribn.
    Dichanthelium oligosanthes (Schult.) Gould subsp. scribnerianum*+
        few-flowered panic grass, Scribner's panic grass, Scribner's rosette grass
             Dichanthelium oligosanthes (Schult.) Gould var. helleri (Nash) Mohlenbr.
             Dichanthelium oligosanthes (Schult.) Gould var. scribnerianum (Nash) Gould
             Panicum helleri Nash
             Panicum oligosanthes Schult. var. helleri (Nash) Fernald
             Panicum oligosanthes Schult. var. scribnerianum (Nash) Fernald
             Panicum scoparium S.Watson ex Nash, non Lam.
             Panicum scribnerianum Nash
    Dichanthelium oligosanthes (Schult.) Gould X D. ovale (Elliott) Gould & C.A.Clark subsp. praecocius (Hitchc. & Chase) Freckmanm & Lelong subsp. scribnerianum
             Panicum oligosanthes Schult. var. scribnerianum (Nash) Fernald X P. praecocius Hitchc. & Chase
    Dichanthelium ovale (Elliott) Gould & C.A.Clark subsp. praecocius+
        stiff-leaved panic grass
             Dichanthelium villosissimum (Nash) Freckmann var. praecocius (Hitchc. & Chase) Freckmann
             Panicum lanuginosum Elliott, non Bosc ex Spreng. var. praecocius (Hitchc. & Chase) McNeill & Dore
             Panicum praecocius Hitchc. & Chase
    Dichanthelium ovale (Elliott) Gould & C.A.Clark subsp. pseudopubescens*+
        stiff-leaved panic grass
             Dichanthelium commonsianum (Ashe) Freckmann
             Dichanthelium commonsianum (Ashe) Freckmann var. euchlamydeum (Shinners) Freckmann
             Dichanthelium ovale (Elliott) Gould & C.A.Clark var. addisonii (Nash) Gould & C.A.Clark
             Dichanthelium villosissimum (Nash) Freckmann var. pseudopubescens (Nash) Mohlenbr.
             Panicum addisonii Nash
             Panicum alabamense Ashe
             Panicum columbianum Scribn. var. commonsianum (Ashe) McNeill & Dore
             Panicum commonsianum Ashe
             Panicum commonsianum Ashe var. addisonii (Nash) R.W.Pohl
             Panicum commonsianum Ashe var. addisonii (Nash) Fernald
             Panicum commonsianum Ashe var. commonsianum
             Panicum commonsianum Ashe var. euchlamydeum (Shinners) R.W.Pohl
             Panicum euchlamydeum Shinners
             Panicum mundum Fernald
             Panicum ovale Elliott var. addisonii (Nash) C.F.Reed
             Panicum ovale Elliott var. pseudopubescens (Nash) Lelong
             Panicum owenae E.P.Bicknell
             Panicum pseudopubescens Nash
             Panicum villosissimum Nash var. pseudopubescens (Nash) Fernald
             Panicum wilmingtonense Ashe
    Dichanthelium perlongum (Nash) Freckmann*+
        long-stalked panic grass
             Dichanthelium depauperatum (Muhl.) Gould var. perlongum (Nash) B.Boivin
             Panicum perlongum Nash
             Panicum strictum Pursh var. perlongum (Nash) Farw.
    Dichanthelium wilcoxianum (Vasey) Freckmann+
        Wilcox's panic grass
             Dichanthelium oligosanthes (Schult.) Gould var. wilcoxianum (Vasey) Gould & C.A.Clark
             Panicum wilcoxianum Vasey
             Panicum wilcoxianum Vasey var. breitungii B.Boivin
  Genus: Digitaria

    Digitaria cognata (Schult.) Pilg. subsp. cognata*+
        fall witch grass
             Digitaria cognata (Schult.) Pilg. var. cognata
             Leptoloma cognatum (Schult.) Chase
             Panicum cognatum Schult.
    Digitaria ischaemum (Schreb.) Muhl.*+
        smooth crabgrass
             Digitaria humifusa Pers.
             Digitaria ischaemum (Schreb.) Muhl. var. ischaemum
             Digitaria ischaemum (Schreb.) Muhl. var. mississippiensis (Gatt.) Fernald
             Panicum ischaemum Schreb.
             Syntherisma ischaemum (Schreb.) Nash
    Digitaria longiflora (Retz.) Pers.
        Indian crabgrass
    Digitaria sanguinalis (L.) Scop.*+
        hairy crabgrass, northern crabgrass
             Panicum sanguinale L.
             Syntherisma sanguinalis (L.) Dulac
  Genus: Echinochloa

    Echinochloa crus-galli (L.) P.Beauv.*+
        barnyard grass, large barnyard grass
             Echinochloa crus-galli (L.) P.Beauv. subsp. crus-galli
             Echinochloa crus-galli (L.) P.Beauv. var. crus-galli
             Echinochloa crus-galli (L.) P.Beauv. var. mitis (Pursh) Peterm.
             Echinochloa muricata (P.Beauv.) Fernald var. occidentalis Wiegand
             Echinochloa occidentalis (Wiegand) Rydb.
             Echinochloa pungens (Poir.) Rydb. var. coarctata Fernald & Griscom
             Panicum crus-galli L.
    Echinochloa muricata (P.Beauv.) Fernald var. microstachya Wiegand+
        rough barnyard grass
             Echinochloa microstachya (Wiegand) Rydb.
             Echinochloa muricata (P.Beauv.) Fernald var. wiegandii Fassett
             Echinochloa pungens (Poir.) Rydb. var. microstachya (Wiegand) Fernald & Griscom
             Echinochloa pungens (Poir.) Rydb. var. multiflora (Wiegand) Fernald & Griscom
             Echinochloa pungens (Poir.) Rydb. var. wiegandii Fassett
             Echinochloa wiegandii (Fassett) McNeill & Dore
    Echinochloa muricata (P.Beauv.) Fernald var. muricata +
        barnyard grass, cockspur grass, rough barnyard grass
             Echinochloa crus-galli (L.) P.Beauv. f. longiseta (Trin.) Farw.
             Echinochloa muricata (P.Beauv.) Fernald var. ludoviciana Wiegand
             Echinochloa pungens (Poir.) Rydb.
             Echinochloa pungens (Poir.) Rydb. var. ludoviciana (Wiegand) Fernald & Griscom
    Echinochloa walteri (Pursh) A.Heller*+
        coast barnyard grass, salt-marsh cockspur grass, water-millet
             Echinochloa walteri (Pursh) A.Heller f. laevigata Wiegand
             Panicum walteri Pursh
  Genus: Eleusine

    Eleusine indica (L.) Gaertn.*+
        crowfoot grass, Indian goose grass, yard grass
             Cynosurus indicus L.
  Genus: Elymus

    Elymus canadensis L.*+
        Canada wild-rye
             Elymus brachystachys Scribn. & Ball
             Elymus canadensis L. f. crescendus Ramaley
             Elymus canadensis L. f. glaucifolius (Muhl.) Fernald
             Elymus canadensis L. var. brachystachys (Scribn. & Ball) Farw.
             Elymus canadensis L. var. canadensis
             Elymus canadensis L. var. hirsutus (Farw.) Dorn
             Elymus canadensis L. var. robustus (Scribn. & J.G.Sm.) Mack. & Bush
             Elymus crescendus (Ramaley) L.C.Wheeler
             Elymus philadelphicus L.
             Elymus philadelphicus L. var. hirsutus Farw.
             Elymus robustus Scribn. & J.G.Sm.
    Elymus hystrix L. var. bigeloviana (Fernald) Bowden+
        Bigelow's bottlebrush grass, eastern bottlebrush grass
             Asperella hystrix (L.) Humb. var. bigeloviana Fernald
             Elymus hystrix L. f. bigelovianus (Fernald) Dore
             Hystrix patula Moench f. bigeloviana (Fernald) Gleason
             Hystrix patula Moench var. bigeloviana (Fernald) Deam
    Elymus hystrix L. var. hystrix *+
        bottlebrush grass, eastern bottlebrush grass, glumeless wild-rye
             Asperella hystrix (L.) Humb.
             Hystrix hystrix (L.) Millsp.
             Hystrix patula Moench
    Elymus riparius Wiegand*+
        riverbank wild-rye, streambank wild-rye
             Elymus canadensis L. var. riparius (Wiegand) B.Boivin
    Elymus submuticus (Hook.) Smyth*+
        awnless wild-rye
             Elymus curvatus Piper
             Elymus virginicus L. var. submuticus Hook.
    Elymus trachycaulus (Link) Gould ex Shinners subsp. subsecundus+
        bearded wheat grass, slender wheat grass
             Agropyron caninum (L.) P.Beauv. var. unilaterale (Cassidy) C.L.Hitchc.
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues var. glaucum (Pease & A.H.Moore) Taylor
             Agropyron subsecundum (Link) Hitchc.
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. ciliatum (Scribn. & J.G.Sm.) Malte
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. glaucum (Pease & A.H.Moore) Malte
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. unilaterale (Cassidy) Malte
             Elymus trachycaulus (Link) Gould ex Shinners subsp. glaucus
             Elymus trachycaulus (Link) Gould ex Shinners var. unilateralis (Cassidy) Beetle
             Triticum subsecundum Link
    Elymus trachycaulus (Link) Gould ex Shinners subsp. trachycaulus+
        slender wheat grass
             Agropyron brevifolium Scribn.
             Agropyron caninum (L.) P.Beauv. subsp. majus
             Agropyron caninum (L.) P.Beauv. var. andinum (Scribn. & J.G.Sm.) Pease & A.H.Moore
             Agropyron caninum (L.) P.Beauv. var. hornemannii (Koch) Pease & A.H.Moore
             Agropyron caninum (L.) P.Beauv. var. mitchellii Welsh
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues subsp. majus
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues subsp. novae-angliae
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues subsp. teslinense
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues var. novae-angliae (Scribn.) Roy L.Taylor & MacBryde
             Agropyron subsecundum (Link) Hitchc. var. andinum (Scribn. & J.G.Sm.) Hitchc.
             Agropyron tenerum Vasey
             Agropyron teslinense Porsild & Senn
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. majus (Vasey) Fernald
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. novae-angliae (Scribn.) Fernald
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. trachycaulum
             Agropyron violaceum (Hornem.) Lange subsp. andinum
             Agropyron violaceum (Hornem.) Lange var. andinum Scribn. & J.G.Sm.
             Elymus pauciflorus (Schwein.) Gould, non Lam.
             Elymus trachycaulus (Link) Gould ex Shinners subsp. andinus
             Elymus trachycaulus (Link) Gould ex Shinners subsp. novae-angliae
             Elymus trachycaulus (Link) Gould ex Shinners subsp. teslinensis
             Elymus trachycaulus (Link) Gould ex Shinners var. andinus (Scribn. & J.G.Sm.) Dorn
             Elymus trachycaulus (Link) Gould ex Shinners var. majus (Vasey) Beetle
             Roegneria pauciflora (Schwein.) Hyl.
             Roegneria trachycaula (Link) Nevski
             Triticum trachycaulum Link
    Elymus villosus Muhl. ex Willd. var. villosus *+
        downy wild-rye, hairy wild-rye, silky wild-rye
             Terrellia villosa (Muhl. ex Willd.) Baum
    Elymus virginicus L. var. virginicus *+
        common eastern wild-rye, Virginia wild-rye
             Elymus australis Scribn. & Ball
             Elymus glabriflorus (Vasey) Scribn. & Ball
             Elymus hirsutiglumis Scribn.
             Elymus jejunus (Ramaley) Rydb.
             Elymus striatus Willd.
             Elymus virginicus L. var. australis (Scribn. & Ball) Hitchc.
             Elymus virginicus L. var. glabriflorus (Vasey) Bush
             Elymus virginicus L. var. hirsutiglumis (Scribn.) Hitchc.
             Elymus virginicus L. var. intermedius (Vasey) Bush
             Elymus virginicus L. var. jejunus (Ramaley) Bush
             Elymus virginicus L. var. typicus Fernald
             Elymus virginicus L. f. hirsutiglumis (Scribn.) Fernald var. typicus Fernald
    Elymus wiegandii Fernald+
        broad-leaved wild-rye, northern riverbank wild-rye, Wiegand's wild-rye
             Elymus canadensis L. subsp. wiegandii
             Elymus canadensis L. var. wiegandii (Fernald) Bowden
  Genus: Elytrigia

    Elytrigia repens (L.) Desv. ex B.D.Jacks.*+
        couchgrass, creeping quackgrass, quackgrass