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WISFLORA: Vascular Plant Species

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County: Pierce

Family: Aceraceae
  Genus: Acer
    Acer negundo L. var. negundo +
        box elder
             Negundo aceroides (L.) Moench
             Negundo negundo (L.) Karst.
    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 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
Family: Adoxaceae
  Genus: Adoxa
    Adoxa moschatellina L.*+
        moschatel, musk-root
Family: Alismataceae
  Genus: Alisma
    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 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
Family: Amaranthaceae
  Genus: Amaranthus
    Amaranthus blitoides S.Watson*+
        creeping amaranth, mat amaranth, matweed, matweed amaranth, prostratre amaranth, prostrate pigweed
             Amaranthus graecizans auct. non L.
    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 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 glabra L.*+
        smooth sumac
             Rhus borealis Greene
             Rhus calophylla Greene
             Rhus glabra L. var. laciniata Carrière
             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
  Genus: Toxicodendron
    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
Family: Apiaceae
  Genus: Angelica
    Angelica atropurpurea L. var. occidentalis Fassett+
        purple-stem angelica, western great angelica
  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: Cryptotaenia
    Cryptotaenia canadensis (L.) DC.*+
        Canadian honewort, white chervil
             Deringa canadensis (L.) Kuntze
  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
  Genus: Pastinaca
    Pastinaca sativa L.*+
        wild parsnip
  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
    Sanicula trifoliata E.P.Bicknell+
        beaked sanicle, large-fruited black snakeroot
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
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
Family: Araliaceae
  Genus: Aralia
    Aralia nudicaulis L.*+
        wild sarsaparilla
    Aralia racemosa L.*+
        American spikenard, life-of-man
             Aralia racemosa L. subsp. racemosa
Family: Aristolochiaceae
  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 incarnata L. subsp. incarnata*+
        swamp milkweed
             Asclepias incarnata L. var. incarnata
    Asclepias ovalifolia Decne.*+
        dwarf milkweed, oval milkweed, oval-leaved 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 rhizophyllum L.*+
        walking fern
             Camptosorus rhizophyllus (L.) Link
Family: Asteraceae
  Genus: Achillea
    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.
  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: Antennaria
    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 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.
  Genus: Arctium
    Arctium minus Bernh.*+
        common burdock, lesser burdock
             Arctium minus Bernh. f. laciniatum Clute
             Lappa minor Hill
  Genus: Arnoglossum
    Arnoglossum reniforme (Hook.) H.Rob.*+
        great Indian-plantain, Muhlenberg's cacalia
             Arnoglossum muhlenbergii (Sch.Bip.) H.Rob.
             Cacalia muhlenbergii (Sch.Bip.) Fernald
             Cacalia reniformis Muhl. ex Willd., non Lam.
             Mesadenia reniformis (Hook.) Raf.
             Mesadenia muhlenbergii (Sch.Bip.) Rydb.
             Senecio atriplicifolius Hook. var. reniformis Hook.
             Senecio muhlenbergii Sch.Bip.
  Genus: Artemisia
    Artemisia absinthium L.+
        absinth sage-wort, absinth wormwood, absinthe, common wormwood, sage-wort
    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 frigida Willd.*+
        fringed sage-wort, prairie sagebrush, prairie sage-wort
    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
  Genus: Aster
    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 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. 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 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 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. 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 lanceolatus Willd. X A. lateriflorus (L.) Britton+
             Aster lateriflorus (L.) Britton X A. lanceolatus Willd.
    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 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 praealtus Poir. X A. puniceus L.+
    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
  Genus: Bidens
    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 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: Centaurea
    Centaurea biebersteinii DC.*+
        spotted knapweed
             Acosta maculosa auct. non Holub
             Centaurea maculosa auct. non Lam.
  Genus: Cirsium
    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 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
  Genus: Coreopsis
    Coreopsis palmata Nutt.*+
        finger tickseed, prairie coreopsis, prairie tickseed, stiff tickseed
  Genus: Crepis
    Crepis tectorum L.*+
        hawk's-beard, narrow-leaved hawk's-beard
  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. 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. var. maculatum subsp. maculatum+
        spotted Joe-Pye-weed
             Eupatorium maculatum L. var. maculatum
             Eupatoriadelphus maculatus (L.) R.M.King & H.Rob.
    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.
  Genus: Galinsoga
    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
  Genus: Helenium
    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 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 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. 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 petiolaris Nutt. subsp. petiolaris*+
        petioled sunflower, plains sunflower, prairie sunflower
    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 laetiflorus Pers. (pro sp.) X *+
        cheerful sunflower, hybrid prairie sunflower, mountain sunflower
             Helianthus laetiflorus Pers.
             Helianthus scaberrimus Elliott
  Genus: Heliopsis
    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: Heterotheca
    Heterotheca villosa (Pursh) Shinners var. ballardii (Rydb.) Semple+
        hairy golden aster, telegraph-plant
             Chrysopsis ballardii Rydb.
  Genus: Hieracium
    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 scabrum Michx.*+
        rough hawkweed, sticky hawkweed
             Hieracium scabrum Michx. var. scabrum
             Hieracium scabrum Michx. var. tonsum Fernald & H.St.John
  Genus: Iva
    Iva xanthifolia Nutt.*+
        bur-weed marsh-elder, giant sump-weed
             Cyclachaena xanthifolia (Nutt.) Fresen.
  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 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: 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 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 punctata Hook. var. nebraskana Gaiser*+
        dotted blazing-star, Nebraska gay-feather
  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 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. 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
  Genus: Prenanthes
    Prenanthes alba L.*+
        lion's-foot, rattlesnake-root, white-lettuce
             Nabalus albus (L.) Hook.
  Genus: Ratibida
    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
  Genus: Senecio
    Senecio congestus (R.Br.) DC.*+
        marsh fleabane, marsh ragwort, northern swamp groundsel
             Senecio congestus (R.Br.) DC. subsp. tonsus
             Senecio congestus (R.Br.) DC. var. palustris (L.) Fernald
             Senecio congestus (R.Br.) DC. var. tonsus Fernald
             Senecio palustris (L.) Hook.
  Genus: Silphium
    Silphium perfoliatum L. var. perfoliatum *+
        cup-plant
  Genus: Solidago
    Solidago canadensis L.*+
        Canadian goldenrod, common goldenrod
    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 hispida Muhl. ex Willd. var. hispida *+
        hairy goldenrod
             Solidago bicolor L. var. concolor Torr. & A.Gray
             Solidago bicolor L. var. ovalis Farw.
             Solidago bicolor L. var. tonsa (Fernald) B.Boivin
             Solidago hispida Muhl. ex Willd. var. tonsa Fernald
    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 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 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 speciosa Nutt. var. speciosa +
        showy goldenrod
             Solidago conferta Mill.
             Solidago harperi Mack.
    Solidago ulmifolia Muhl. ex Willd. var. ulmifolia *+
        elm-leaved goldenrod
  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.
  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 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 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.
Family: Betulaceae
  Genus: Alnus
    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.
  Genus: Carpinus
    Carpinus caroliniana Walter subsp. virginiana*+
        American hornbeam, blue-beech, hornbeam, ironwood
             Carpinus betulus L. var. virginiana Marshall
             Carpinus caroliniana Walter var. virginiana (Marshall) Fernald
             Carpinus virginiana (Marshall) Sudw. 1893, not Miller 1768
  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.
    Corylus cornuta Marshall subsp. cornuta*+
        beaked hazelnut
             Corylus cornuta Marshall var. cornuta
             Corylus cornuta Marshall var. megaphylla Vict. & J.Rousseau
             Corylus rostrata Aiton
  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: Boraginaceae
  Genus: Hackelia
    Hackelia virginiana (L.) I.M.Johnst.*+
        beggar's-lice, stickseed, wild comfrey
             Lappula virginiana (L.) Greene
             Myosotis virginiana L.
  Genus: Lappula
    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.
    Lithospermum latifolium Michx.*+
        American gromwell, broad-leaved gromwell
  Genus: Onosmodium
    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 molle Michx.
        marble-seed, smooth onosmodium, western false gromwell
Family: Brassicaceae
  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 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
  Genus: Barbarea
    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 nigra (L.) W.D.J.Koch*+
        black mustard
             Sinapis nigra 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 pensylvanica Muhl. ex Willd.*+
        Pennsylvania bitter-cress
             Cardamine hirsuta L. var. pensylvanica Muhl. ex Willd.
             Cardamine pensylvanica Muhl. ex Willd. var. brittoniana Farw.
  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: 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: Erysimum
    Erysimum cheiranthoides L.*+
        worm-seed mustard, worm-seed wallflower
             Cheirinia cheiranthoides (L.) Link
             Erysimum cheiranthoides L. subsp. altum
    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: Lepidium
    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
  Genus: Lesquerella
    Lesquerella ludoviciana (Nutt.) S.Watson*+
        foothill bladder-pod, silver bladder-pod
  Genus: Nasturtium
    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: Rorippa
    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 sinuata (Nutt.) Hitchc.*+
        spreading yellow-cress, western yellow-cress
             Nasturtium sinuatum Nutt.
             Radicula sinuata (Nutt.) Greene
    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 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: 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: Senna
    Senna obtusifolia (L.) H.S.Irwin & Barneby*+
        coffee-weed, sickle-pod
             Cassia obtusifolia L.
             Cassia tora auct. non L.
             Emelista tora sensu Britton & Rose
Family: Campanulaceae
  Genus: Campanula
    Campanula americana L.*+
        American bellflower, tall bellflower
             Campanulastrum americanum (L.) Small
             Campanula americana L. var. illinoensis (Fresen.) Farw.
    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 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.
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: Lonicera
    Lonicera dioica L. var. glaucescens (Rydb.) Butters+
        wild honeysuckle
             Lonicera glaucescens Rydb.
    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 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. albus +
        snowberry
             Symphoricarpos albus (L.) S.F.Blake var. pauciflorus (W.J.Robbins ex A.Gray) S.F.Blake
             Symphoricarpos pauciflorus W.J.Robbins ex A.Gray
             Symphoricarpos racemosus Michx.
             Symphoricarpos racemosus Michx. var. pauciflorus W.J.Robbins ex A.Gray
    Symphoricarpos occidentalis Hook.*+
        western snowberry, wolfberry
  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 perfoliatum L.*+
        feverwort, late horse-gentian, tinker's-weed, wild-coffee
             Triosteum perfoliatum L. var. perfoliatum
  Genus: Viburnum
    Viburnum lentago L.*+
        nannyberry, sheepberry
             Viburnum X vetteri Zabel X
    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 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
Family: Caryophyllaceae
  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
  Genus: Cerastium
    Cerastium arvense L. subsp. arvense+
        field chickweed, starry grasswort
    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.
  Genus: Dianthus
    Dianthus armeria L.*+
        Deptford pink
  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 nivea (Nutt.) Muhl. ex Otth+
        evening campion, snowy campion, white campion
             Cucubalus niveus Nutt.
  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
Family: Celastraceae
  Genus: Celastrus
    Celastrus scandens L.*+
        American bittersweet, climbing bittersweet
  Genus: Euonymus
    Euonymus atropurpurea Jacq. var. atropurpurea *+
        burning-bush, eastern wahoo
             Evonymus atropurpurea Jacq.
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 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
  Genus: Chenopodium
    Chenopodium berlandieri Moq. var. bushianum (Aellen) Cronquist+
        Bush's goosefoot, pit-seed goosefoot
             Chenopodium bushianum Aellen
             Chenopodium bushianum Aellen var. acutidentatum Aellen
             Chenopodium paganum auct. non Rchb.
    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.
  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: 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
  Genus: Hudsonia
    Hudsonia tomentosa Nutt. var. tomentosa *+
        false heather, woolly beach-heather
  Genus: Lechea
    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 occidentalis (Britton) Smyth var. occidentalis *+
        prairie spiderwort, western spiderwort
             Tradescantia occidentalis (Britton) Smyth var. typica E.S.Anderson & Woodson
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
Family: Cornaceae
  Genus: Cornus
    Cornus alternifolia L.f.*+
        alternate-leaved dogwood, pagoda dogwood
             Swida alternifolia (L.f.) 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: Cucurbitaceae
  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 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 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: Carex
    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 cephalophora Muhl. ex Willd.*+
        oval-headed sedge, short-headed bracted sedge, wood-bank sedge
    Carex eburnea Boott*+
        bristle-leaf sedge
    Carex laeviconica Dewey*+
        long-toothed lake sedge, smooth-cone sedge
    Carex meadii Dewey*+
        Mead's sedge, Mead's stiff sedge
             Carex tetanica Schkuhr var. meadii (Dewey) L.H.Bailey
    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 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 retrorsa Schwein.*+
        deflexed bottlebrush sedge, knot-sheath sedge, retrorse sedge
    Carex siccata Dewey*+
        dry-spiked sedge, hay sedge, hillside sedge, running savanna sedge
             Carex foenea Willd., misapplied
    Carex sprengelii Dewey ex Spreng.*+
        long-beaked sedge, Sprengel's sedge
             Carex longirostris Torr., non Krock.
    Carex tenera Dewey var. echinodes (Fernald) Wiegand*+
        marsh straw sedge, quill sedge
             Carex straminea Willd. ex Schkuhr var. echinodes Fernald
    Carex tribuloides Wahlenb. var. tribuloides *+
        awl-fruited oval sedge, blunt-broom sedge
  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 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 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 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: 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 tenuis (Willd.) Schult. var. verrucosa (Svenson) Svenson+
        dog's hair, slender spike-rush
             Eleocharis capitata (L.) R.Br. var. verrucosa Svenson
             Eleocharis verrucosa (Svenson) L.J.Harms
  Genus: Eriophorum
    Eriophorum angustifolium Honck. subsp. angustifolium*+
        cotton-grass
             Eriophorum angustifolium Honck. var. angustifolium
             Eriophorum polystachion auct. non L.
  Genus: Schoenoplectus
    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
Family: Dennstaedtiaceae
  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: 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
  Genus: Deparia
    Deparia acrostichoides (Sw.) M.Kato*+
        silver false spleenwort, silvery glade fern, silvery spleenwort
             Asplenium acrostichoides Sw.
             Athyrium acrostichoides (Sw.) Diels
             Athyrium thelypterioides (Michx.) Desv.
             Athyrium thelypterioides (Michx.) Desv. f. acrostichoides (Sw.) Gilbert
             Diplazium acrostichoides (Sw.) Butters
  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 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.
  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.
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 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 pratense Ehrh.*+
        meadow horsetail
             Equisetum pratense Ehrh. f. nanum (Milde) Klinge
    Equisetum scirpoides Michx.*+
        dwarf scouring rush, sedge horsetail
    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: 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.
  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 cyathophora Murray+
        fire-on-the-mountain, painted poinsettia, wild poinsettia
             Euphorbia geniculata Ortega
             Euphorbia heterophylla auct. non L.
             Euphorbia heterophylla L. var. cyathophora (Murray) Griseb.
             Euphorbia heterophylla L. var. graminifolia (Michx.) Engelm.
             Euphorbia prunifolia Jacq.
             Poinsettia cyathophora (Murray) Klotzsch & Garcke
             Poinsettia geniculata (Ortega) Klotzsch & Garcke
             Poinsettia heterophylla (L.) Klotzsch & Garcke
    Euphorbia davidii Subils*+
        David's spurge
             Euphorbia dentata auct. non Michx.
             Euphorbia dentata Michx. var. gracillima Millsp.
    Euphorbia hexagona Nutt.
        six-angle spurge
             Zygophyllidium hexagonum (Nutt.) Small
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: 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.
    Astragalus crassicarpus Nutt. var. crassicarpus *+
        ground-plum, ground-plum milk-vetch, prairie-plum
             Astragalus caryocarpus Ker Gawl.
             Astragalus succulentus Richardson
             Geoprumnon crassicarpum (Nutt.) Rydb. ex Small
             Geoprumnon succulentum (Richardson) Rydb.
  Genus: Baptisia
    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: Coronilla
    Coronilla varia L.*+
        crown-vetch, purple crown-vetch
             Securigera varia (L.) Lassen
  Genus: Crotalaria
    Crotalaria sagittalis L.*+
        arrowhead rattle-box, rattle-box, weedy rattle-box
             Crotalaria fruticosa Mill.
             Crotalaria sagittalis L. var. blumeriana Senn
             Crotalaria sagittalis L. var. fruticosa (Mill.) Fawc. & Rendle
             Crotalaria sagittalis L. var. oblonga Michx.
  Genus: Dalea
    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
    Dalea villosa (Nutt.) Spreng. var. villosa *+
        downy prairie-clover, silky prairie-clover
             Petalostemon villosum Nutt.
  Genus: Desmodium
    Desmodium canadense (L.) DC.*+
        Canadian tick-trefoil, showy tick-trefoil
             Hedysarum canadense L.
             Meibomia canadensis (L.) Kuntze
    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
  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 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
  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
  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. sativa+
        alfalfa, blue alfalfa
  Genus: Melilotus
    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: Strophostyles
    Strophostyles helvula (L.) Elliott*+
        annual woolly bean, trailing fuzzy bean, trailing wild bean
             Phaseolus helvulus L.
             Strophostyles angulosa (Willd.) Elliott var. missouriensis S.Watson
             Strophostyles helvula (L.) Elliott var. missouriensis (S.Watson) Britton
  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 aureum Pollich*+
        golden clover, palmate hop clover, yellow hop clover
             Trifolium agrarium L.
    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 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
  Genus: Vicia
    Vicia villosa Roth*+
        hairy vetch, winter vetch
             Vicia villosa Roth subsp. villosa
Family: Fagaceae
  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 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 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
Family: Fumariaceae
  Genus: Corydalis
    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
  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 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.
Family: Geraniaceae
  Genus: Geranium
    Geranium maculatum L.*+
        Crane's-bill, spotted geranium, wild geranium
             Geranium maculatum L. f. albiflorum (Raf.) House
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 missouriense Nutt.*+
        Missouri gooseberry
             Grossularia missouriensis (Nutt.) Coville & Britton
             Ribes gracile Pursh, non Michx.
             Ribes missouriense Nutt. var. ozarkanum Fassett
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.
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 perforatum L.*+
        common St. John's-wort, Klamath-weed, St. John's-wort
    Hypericum pyramidatum Aiton*+
        giant St. John's-wort, great St. John's-wort
             Hypericum ascyron L., misapplied
Family: Iridaceae
  Genus: 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 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
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.
  Genus: Juglans
    Juglans cinerea L.*+
        butternut, white walnut
             Wallia cinerea (L.) Alef.
Family: Lamiaceae
  Genus: Agastache
    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: Blephilia
    Blephilia hirsuta (Pursh) Benth. var. hirsuta *+
        hairy pagoda-plant, hairy wood mint
  Genus: Clinopodium
    Clinopodium vulgare L.*+
        wild-basil
             Clinopodium vulgare L. var. diminutum Simon
             Clinopodium vulgare L. var. neogaea (Fernald) C.F.Reed
             Satureja vulgaris (L.) Fritsch
             Satureja vulgaris (L.) Fritsch var. diminuta (Simon) Fernald & Wiegand
             Satureja vulgaris (L.) Fritsch var. neogaea Fernald
  Genus: Galeopsis
    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. 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
  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 virginicus L.*+
        bugleweed, Virginia water-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.
  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
  Genus: Nepeta
    Nepeta cataria L.*+
        catnip
  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
  Genus: Pycnanthemum
    Pycnanthemum virginianum (L.) T.Durand & B.D.Jacks. ex B.L.Rob. & Fernald*+
        common mountain mint, Virginia mountain mint
  Genus: Scutellaria
    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
    Scutellaria parvula Michx. var. parvula +
        small skullcap
  Genus: Stachys
    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. var. virginicum (L.) Eaton+
        American germander, Virginia germander, wood sage
Family: Lemnaceae
  Genus: Lemna
    Lemna minor L.*+
        common duckweed, lesser duckweed, small duckweed
             Lemna cyclostasa Elliott ex Schleid.
    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
Family: Liliaceae
  Genus: Allium
    Allium tricoccum Sol. var. tricoccum *+
        ramp, wild leek
             Allium pictum Moldenke
             Allium triflorum Raf.
             Ophioscorodon tricoccum (Sol.) Wallr.
             Validallium tricoccum (Sol.) Small
  Genus: Asparagus
    Asparagus officinalis L.*+
        asparagus, common asparagus, garden asparagus
  Genus: Erythronium
    Erythronium albidum Nutt.*+
        small white fawn-lily, white dog-tooth violet, white trout-lily
    Erythronium americanum Ker Gawl. subsp. americanum*+
        American trout-lily, yellow dog-tooth violet, yellow trout-lily
             Erythronium americanum Ker Gawl. f. bachii (Farw.) Dole
  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 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.
  Genus: Maianthemum
    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: 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.
  Genus: Trillium
    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 nivale Riddell*+
        dwarf white trillium, dwarf white wake-robin, snow trillium
  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
Family: Linaceae
  Genus: Linum
    Linum rigidum Pursh*+
        stiff-stem yellow flax
    Linum sulcatum Riddell*+
        grooved yellow flax
             Cathartolinum sulcatum (Riddell) Small
             Linum sulcatum Riddell var. sulcatum
             Mesynium sulcatum (Riddell) A.Löve & D.Löve
Family: Lobeliaceae
  Genus: Lobelia
    Lobelia cardinalis L. var. cardinalis *+
        cardinal-flower
    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: 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
Family: Malvaceae
  Genus: Abutilon
    Abutilon theophrasti Medik.*+
        piemarker, velvet-leaf
             Abutilon abutilon (L.) Rusby
             Abutilon avicennae Gaertn.
  Genus: Malva
    Malva neglecta Wallr.*+
        cheeses, common mallow
             Malva rotundifolia auct. non L.
  Genus: Napaea
    Napaea dioica L.*+
        glade mallow
             Napaea dioica L. f. stellata Fassett
Family: Menispermaceae
  Genus: Menispermum
    Menispermum canadense L.*+
        Canadian moonseed, common moonseed
Family: Najadaceae
  Genus: Najas
    Najas guadalupensis (Spreng.) Magnus subsp. muenscheri+
        Muenscher's water-nymph, southern naiad, southern water-nymph
             Najas muenscheri R.T.Clausen
Family: Nyctaginaceae
  Genus: Mirabilis
    Mirabilis albida (Walter) Heimerl*+
        pale umbrella-wort, white four-o'clock
             Allionia albida Walter
             Allionia coahuilensis Standl.
             Allionia comata Small
             Allionia divaricata Rydb.
             Allionia hirsuta Pursh
             Allionia oblongifolia (A.Gray) Small
             Allionia pauciflora (Buckley) Standl.
             Allionia pratensis Standl.
             Allionia pseudaggregata (Heimerl) Standl.
             Allionia pumila Standl.
             Mirabilis ciliata (Standl.) Standl.
             Mirabilis coahuilensis (Standl.) Standl.
             Mirabilis comata (Small) Standl.
             Mirabilis eutricha Shinners
             Mirabilis grayana (Standl.) Standl.
             Mirabilis hirsuta (Pursh) MacMill.
             Mirabilis lanceolata (Rydb.) Standl.
             Mirabilis oblongifolia (A.Gray) Heimerl
             Mirabilis pauciflora (Buckley) Standl.
             Mirabilis pseudaggregata Heimerl
             Mirabilis pumila (Standl.) Standl.
             Oxybaphus albidus (Walter) Sweet
             Oxybaphus coahuilensis (Standl.) Weath.
             Oxybaphus comatus (Small) Weath.
             Oxybaphus hirsutus (Pursh) Sweet
             Oxybaphus lanceolatus (Rydb.) Standl.
             Oxybaphus pauciflorus Buckley
             Oxybaphus pseudaggregatus (Heimerl) Weath.
             Oxybaphus pumilus (Standl.) Standl.
    Mirabilis nyctaginea (Michx.) MacMill.*+
        heart-leaved umbrella-wort, wild four-o'clock
             Allionia nyctaginea Michx.
             Oxybaphus nyctagineus (Michx.) Sweet
Family: Oleaceae
  Genus: Fraxinus
    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
Family: Onagraceae
  Genus: Calylophus
    Calylophus serrulatus (Nutt.) P.H.Raven*+
        yellow evening-primrose, yellow sundrops
             Calylophus australis Towner & P.H.Raven
             Meriolix intermedia Rydb. ex Small
             Meriolix oblanceolata Rydb.
             Meriolix serrulata (Nutt.) Walp.
             Oenothera serrulata Nutt.
             Oenothera serrulata Nutt. var. typica Munz
  Genus: Circaea
    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 ciliatum Raf. subsp. glandulosum*+
        American willow-herb, glandular willow-weed, hairy willow-herb
             Epilobium adenocaulon Hausskn. var. occidentale Trel.
             Epilobium boreale Hausskn.
             Epilobium ciliatum Raf. var. glandulosum (Lehm.) Dorn
             Epilobium cinerascens Piper
             Epilobium glandulosum Lehm.
             Epilobium glandulosum Lehm. var. cardiophyllum Fernald
             Epilobium adenocaulon Hausskn. var. cinerascens (Piper) M.Peck
             Epilobium glandulosum Lehm. var. glandulosum
             Epilobium glandulosum Lehm. var. occidentale (Trel.) Fernald
             Epilobium occidentale (Trel.) Rydb.
             Epilobium watsonii Barbey var. occidentale (Trel.) C.L.Hitchc.
    Epilobium coloratum Biehler*+
        cinnamon willow-herb, eastern willow-herb
  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 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 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 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 Ångstr.
             Osmunda virginiana L.
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: 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: Cypripedium
    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.
  Genus: Goodyera
    Goodyera pubescens (Willd.) R.Br.*+
        downy rattlesnake-plantain
             Epipactis pubescens (Willd.) A.A.Eaton
             Neottia pubescens Willd.
             Peramium pubescens (Willd.) MacMill.
  Genus: Spiranthes
    Spiranthes magnicamporum Sheviak*+
        Great Plains lady's-tresses
Family: Orobanchaceae
  Genus: Orobanche
    Orobanche ludoviciana Nutt. subsp. ludoviciana*+
        Louisiana broom-rape, prairie broom-rape
             Aphyllon arenosum Suksd.
             Conopholis ludoviciana (Nutt.) A.W.Wood
             Myzorrhiza ludoviciana (Nutt.) Rydb.
             Orobanche ludoviciana Nutt. var. arenosa (Suksd.) Cronquist
             Orobanche ludoviciana Nutt. var. genuina Beck
             Orobanche ludoviciana Nutt. var. ludoviciana
             Orobanche multiflora Nutt. var. arenosa (Suksd.) Munz
Family: Osmundaceae
  Genus: Osmunda
    Osmunda claytoniana L.*+
        interrupted fern
Family: Oxalidaceae
  Genus: Oxalis
    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 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: Sanguinaria
    Sanguinaria canadensis L.*+
        bloodroot
             Sanguinaria australis Greene
             Sanguinaria canadensis L. var. rotundifolia (Greene) Fedde
             Sanguinaria dilleniana Greene
             Sanguinaria rotundifolia Greene
Family: Pinaceae
  Genus: Pinus
    Pinus strobus L.*+
        eastern white pine
             Strobus strobus (L.) Small
    Pinus sylvestris L.*+
        Scotch pine, Scot pine
Family: Plantaginaceae
  Genus: Plantago
    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
Family: Poaceae
  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. 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. 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.
  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
  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 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: 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 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 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
  Genus: Calamagrostis
    Calamagrostis epigeios (L.) Roth*+
        Chee reed grass, feathertop
  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: Deschampsia
    Deschampsia cespitosa (L.) P.Beauv. subsp. cespitosa+
        small-flowered tickle grass, tufted hair grass
             Aira cespitosa L.
             Deschampsia cespitosa (L.) P.Beauv. subsp. genuina
             Deschampsia cespitosa (L.) P.Beauv. var. abbei B.Boivin
             Deschampsia cespitosa (L.) P.Beauv. var. alpicola (Rydb.) A.Löve, D.Löve & Kapoor
             Deschampsia cespitosa (L.) P.Beauv. var. genuina Gren. & Godr.
             Deschampsia cespitosa (L.) P.Beauv. var. intercotidalis B.Boivin
             Deschampsia cespitosa (L.) P.Beauv. var. littoralis (Gaudin) K.Richt.
             Deschampsia cespitosa (L.) P.Beauv. var. longiflora Beal
             Deschampsia cespitosa (L.) P.Beauv. var. maritima Vasey
  Genus: Dichanthelium
    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 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 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.
  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
  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
  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. hystrix *+
        bottlebrush grass, eastern bottlebrush grass, glumeless wild-rye
             Asperella hystrix (L.) Humb.
             Hystrix hystrix (L.) Millsp.
             Hystrix patula Moench
    Elymus submuticus (Hook.) Smyth*+
        awnless wild-rye
             Elymus curvatus Piper
             Elymus virginicus L. var. submuticus Hook.
    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: Eragrostis
    Eragrostis cilianensis (All.) Vignolo ex Janch.*+
        stink grass
             Eragrostis major Host
             Eragrostis megastachya (Koeler) Link
             Poa cilianensis All.
    Eragrostis hypnoides (Lam.) Britton, Sterns & Poggenb.*+
        creeping love grass, teal love grass
             Poa hypnoides Lam.
    Eragrostis pectinacea (Michx.) Nees var. pectinacea *+
        Carolina love grass, low love grass, small love grass, tufted love grass
             Eragrostis caroliniana (Biehler) Scribn.
             Eragrostis diffusa Buckley
             Eragrostis purshii hort. ex Schrad.
             Poa pectinacea Michx.
    Eragrostis spectabilis (Pursh) Steud.*+
        purple love grass, tumble grass
             Eragrostis spectabilis (Pursh) Steud. var. sparsihirsuta Farw.
             Poa spectabilis Pursh
  Genus: Eriochloa
    Eriochloa villosa (Thunb.) Kunth*+
        Chinese cup grass, hairy cup grass, woolly cup grass
             Paspalum villosum Thunb.
  Genus: Festuca
    Festuca subverticillata (Pers.) E.B.Alexeev*+
        nodding fescue
             Festuca obtusa Biehler
  Genus: Glyceria
    Glyceria grandis S.Watson*+
        American manna grass, reed manna grass
             Glyceria grandis S.Watson f. pallescens Fernald
             Glyceria grandis S.Watson var. grandis
             Glyceria maxima (Hartm.) Holmb. subsp. grandis
             Glyceria maxima (Hartm.) Holmb. var. americana (Torr.) B.Boivin
             Panicularia grandis (S.Watson) Nash
  Genus: Hordeum
    Hordeum jubatum L.*+
        foxtail barley, squirrel-tail grass
             Critesion jubatum (L.) Nevski
             Hordeum caespitosum Scribn. ex Pammel
             Hordeum jubatum L. subsp. jubatum
             Hordeum jubatum L. var. caespitosum (Scribn. ex Pammel) Hitchc.
  Genus: Leersia
    Leersia oryzoides (L.) Sw.*+
        rice cut grass
             Homalocenchrus oryzoides (L.) Pollich
             Leersia oryzoides (L.) Sw. f. glabra A.A.Eaton
             Leersia oryzoides (L.) Sw. f. inclusa (Wiesb.) Dörfl.
             Phalaris oryzoides L.
    Leersia virginica Willd.*+
        white grass
             Homalocenchrus virginicus (Willd.) Britton
             Leersia virginica Willd. var. ovata (Poir.) Fernald
  Genus: Muhlenbergia
    Muhlenbergia cuspidata (Torr. ex Hook.) Rydb.*+
        plains muhly, prairie muhly, prairie satin grass
             Muhlenbergia brevifolia (Nutt.) M.E.Jones
    Muhlenbergia frondosa (Poir.) Fernald*+
        common satin grass, wire-stem muhly
             Agrostis frondosa Poir.
             Muhlenbergia commutata (Scribn.) Bush
             Muhlenbergia frondosa (Poir.) Fernald f. commutata (Scribn.) Fernald
             Muhlenbergia frondosa (Poir.) Fernald f. frondosa
             Muhlenbergia mexicana (L.) Trin. f. commutata (Scribn.) Wiegand
    Muhlenbergia mexicana (L.) Trin.*+
        leafy satin grass, Mexican muhly, wire-stem muhly
             Agrostis mexicana L.
             Muhlenbergia ambigua Torr.
             Muhlenbergia foliosa (Roem. & Schult.) Trin.
             Muhlenbergia foliosa (Roem. & Schult.) Trin. subsp. ambigua
             Muhlenbergia foliosa (Roem. & Schult.) Trin. subsp. setiglumis
             Muhlenbergia mexicana (L.) Trin. f. ambigua (Torr.) Fernald
             Muhlenbergia mexicana (L.) Trin. f. mexicana
             Muhlenbergia mexicana (L.) Trin. f. setiglumis (S.Watson) Fernald
             Muhlenbergia mexicana (L.) Trin. var. filiformis (Willd.) Scribn.
    Muhlenbergia racemosa (Michx.) Britton, Sterns & Poggenb.*+
        marsh muhly, upland wild-Timothy
             Agrostis racemosa Michx.
    Muhlenbergia sobolifera (Muhl. ex Willd.) Trin.*+
        creeping muhly, rock muhly, rock satin grass
             Agrostis sobolifera Muhl. ex Willd.
             Muhlenbergia sobolifera (Muhl. ex Willd.) Trin. var. setigera Scribn.
  Genus: Oryzopsis
    Oryzopsis racemosa (Sm.) Ricker ex Hitchc.*+
        black-seeded rice grass
             Milium racemosum Sm.
             Piptatherum racemosum Ricker ex Hitchc.
  Genus: Panicum
    Panicum capillare L. subsp. capillare*+
        common witch grass, old-witch grass, witch grass
             Panicum barbipulvinatum Nash
             Panicum capillare L. subsp. barbipulvinatum
             Panicum capillare L. var. barbipulvinatum (Nash) McGregor
             Panicum capillare L. var. brevifolium Vasey ex Rydb. & Shear
             Panicum capillare L. var. occidentale Rydb.
    Panicum dichotomiflorum Michx. subsp. dichotomiflorum*+
        fall panic grass, fall panicum, knee grass
             Panicum dichotomiflorum Michx. var. dichotomiflorum
             Panicum dichotomiflorum Michx. var. geniculatum (A.W.Wood) Fernald
             Panicum dichotomiflorum Michx. var. imperiorum Fernald
    Panicum virgatum L.*+
        switch grass
             Panicum virgatum L. var. cubense Griseb.
             Panicum virgatum L. var. obtusum A.W.Wood
             Panicum virgatum L. var. virgatum
  Genus: Paspalum
    Paspalum setaceum Michx.*+
        hairy bead grass, thin paspalum
  Genus: Phleum
    Phleum pratense L. subsp. pratense*+
        common timothy, timothy
  Genus: Poa
    Poa annua L.*
        annual bluegrass, speargrass
             Poa annua L. var. aquatica Asch.
             Poa annua L. var. reptans Hausskn.
    Poa compressa L.*
        Canada bluegrass, wiregrass
    Poa interior Rydb.
        inland bluegrass
             Poa nemoralis L. subsp. interior
             Poa nemoralis L. var. interior (Rydb.) Butters & Abbe
    Poa palustris L.*
        fowl meadow grass, marsh bluegrass
             Poa crocata Michx.
             Poa triflora Gilib.
    Poa pratensis L.*
        Kentucky bluegrass
             Poa agassizensis B.Boivin & D.Löve
             Poa alpigena (Fr. ex Blytt) Lindm.
             Poa alpigena (Fr. ex Blytt) Lindm. subsp. colpodea
             Poa alpigena (Fr. ex Blytt) Lindm. var. colpodea (Fr. ex Blytt) Schol.
             Poa angustifolia L.
             Poa pratensis L. subsp. agassizensis
             Poa pratensis L. subsp. alpigena
             Poa pratensis L. subsp. angustifolia
             Poa pratensis L. subsp. colpodea
             Poa pratensis L. var. angustifolia (L.) Gaudin
             Poa pratensis L. var. alpigena Fr. ex Blytt
             Poa pratensis L. var. colpodea (Fr. ex Blytt) Schol.
             Poa pratensis L. var. domestica Laest.
             Poa pratensis L. var. gelida (Roem. & Schult.) Böcher
             Poa pratensis L. var. iantha Wahlenb.
             Poa pratensis L. var. vivipara (Malmgren) B.Boivin
  Genus: Schizachyrium
    Schizachyrium scoparium (Michx.) Nash*+
        broom beard grass, little blue-stem, prairie beard grass
    Schizachyrium scoparium (Michx.) Nash var. scoparium
        broom beard grass, broom blue-stem, little blue-stem
             Andropogon neomexicanus Nash
             Andropogon praematurus Fernald
             Andropogon scoparius Michx.
             Andropogon scoparius Michx. var. frequens F.T.Hubb.
             Andropogon scoparius Michx. var. neomexicanus (Nash) Hitchc.
             Andropogon scoparius Michx. var. polycladus Scribn. & Ball
             Andropogon scoparius Michx. var. septentrionalis Fernald & Griscom
             Andropogon scoparius Michx. var. villosissimus Kearney
             Schizachyrium praematurum (Fernald) C.F.Reed
             Schizachyrium scoparium (Michx.) Nash subsp. scoparium
             Schizachyrium scoparium (Michx.) Nash var. frequens (F.T.Hubb.) Gould
             Schizachyrium scoparium (Michx.) Nash var. neomexicanum (Nash) Gould
             Schizachyrium scoparium (Michx.) Nash var. polycladum (Scribn. & Ball) C.F.Reed
  Genus: Setaria
    Setaria viridis (L.) P.Beauv.*+
        green bristle grass, green foxtail
    Setaria viridis (L.) P.Beauv. var. major (Gaudin) Peterm.+
        giant green foxtail, green bristle grass, green foxtail
             Panicum viride L. var. majus Gaudin
             Setaria viridis (L.) P.Beauv. var. robustapurpurea Schreib.
    Setaria viridis (L.) P.Beauv. var. viridis +
        green bristle grass, green foxtail
             Chaetochloa viridis (L.) Scribn.
             Panicum viride L.
             Setaria viridis (L.) P.Beauv. var. breviseta (Döll) Hitchc.
             Setaria viridis (L.) P.Beauv. var. robustaalba Schreib.
             Setaria viridis (L.) P.Beauv. var. weinmannii (Roem. & Schult.) Borbás
  Genus: Sorghastrum
    Sorghastrum nutans (L.) Nash*+
        yellow Indian grass
             Andropogon nutans L.
             Sorghastrum avenaceum (Michx.) Nash
  Genus: Spartina
    Spartina pectinata Link*+
        prairie cord grass, slough grass
             Spartina michauxiana Hitchc.
             Spartina pectinata Link var. suttiei (Farw.) Fernald
  Genus: Sphenopholis
    Sphenopholis intermedia (Rydb.) Rydb.*+
        slender wedge grass
             Eatonia intermedia Rydb.
             Sphenopholis intermedia (Rydb.) Rydb. var. pilosa Dore
             Sphenopholis obtusata (Michx.) Scribn. var. major (Torr.) Erdman
  Genus: Sporobolus
    Sporobolus compositus (Poir.) Merr. var. compositus *+
        meadow drop-seed, rough drop-seed, tall drop-seed
             Sporobolus asper (Michx.) Kunth
             Sporobolus asper (Michx.) Kunth var. asper
             Sporobolus asper (Michx.) Kunth var. hookeri (Trin.) Vasey
    Sporobolus cryptandrus (Torr.) A.Gray*+
        sand drop-seed
             Sporobolus cryptandrus (Torr.) A.Gray var. occidentalis E.K.Jones & Fassett
    Sporobolus cryptandrus (Torr.) A.Gray var. cryptandrus +
        sand drop-seed
             Agrostis cryptandra Torr.
             Sporobolus cryptandrus (Torr.) A.Gray subsp. cryptandrus
    Sporobolus cryptandrus (Torr.) A.Gray var. fuscicola (Hook.) Pohl+
        sand drop-seed
             Sporobolus cryptandrus (Torr.) A.Gray subsp. fuscicola
    Sporobolus heterolepis (A.Gray) A.Gray*+
        northern drop-seed, prairie drop-seed
             Vilfa heterolepis A.Gray
    Sporobolus neglectus Nash*+
        puff-sheath drop-seed, small drop-seed
             Sporobolus vaginiflorus (Torr. ex A.Gray) A.W.Wood var. neglectus (Nash) Scribn.
    Sporobolus vaginiflorus (Torr. ex A.Gray) A.W.Wood var. vaginiflorus *+
        poverty grass, poverty drop-seed, sheathed drop-seed
             Sporobolus vaginiflorus (Torr. ex A.Gray) A.W.Wood var. inaequalis Fernald
  Genus: Vulpia
    Vulpia octoflora (Walter) Rydb. var. glauca (Nutt.) Fernald*+
        six-weeks fescue
             Festuca gracilenta Buckley
             Festuca octoflora Walter var. glauca (Nutt.) Fernald
             Festuca octoflora Walter var. tenella (Willd.) Fernald
             Festuca tenella Willd.
             Festuca tenella Willd. var. glauca Nutt.
             Vulpia octoflora (Walter) Rydb. var. tenella (Willd.) Fernald
  Genus: Zizania
    Zizania palustris L. var. interior (Fassett) Dore+
        northern wild rice
             Zizania aquatica L. var. interior Fassett
             Zizania interior (Fassett) Rydb.
Family: Polemoniaceae
  Genus: Collomia
    Collomia linearis Nutt.*+
        collomia, narrow-leaved mountain trumpet
             Gilia linearis (Nutt.) A.Gray
  Genus: Phlox
    Phlox paniculata L.*+
        fall phlox, garden phlox, perennial phlox, summer phlox
    Phlox subulata L.*+
        moss phlox, moss-pink
  Genus: Polemonium
    Polemonium reptans L. var. reptans *+
        Greek-valerian, spreading Jacob's-ladder
Family: Polygonaceae
  Genus: Polygonum
    Polygonum amphibium L. var. emersum Michx.*+
        long-root smartweed, water heart's-ease, water smartweed
             Persicaria amphibia (L.) S.F.Gray, pro parte
             Persicaria amphibia (L.) S.F.Gray var. emersa (Michx.) Hickman
             Persicaria coccinea (Muhl.) Greene
             Persicaria muhlenbergii (S.Watson) Small
             Persicaria pratincola Greene
             Polygonum amphibium L. f. terrestre (Willd.) S.F.Blake
             Polygonum amphibium L. var. coccineum (Muhl. ex Willd.) Farw.
             Polygonum amphibium L. var. terrestre Willd.
             Polygonum coccineum Muhl. ex Willd.
             Polygonum coccineum Muhl. ex Willd. f. natans (Wiegand) Stanford
             Polygonum coccineum Muhl. ex Willd. f. terrestre (Willd.) Stanford
             Polygonum coccineum Muhl. ex Willd. var. pratincola (Greene) Stanford
             Polygonum coccineum Muhl. ex Willd. var. terrestre Willd.
             Polygonum muhlenbergii S.Watson
             Polygonum muhlenbergii S.Watson f. natans Wiegand
             Polygonum muhlenbergii S.Watson var. terrestre (Willd.) Trel.
             Polygonum rigidulum E.Sheld.
             Polygonum terrestre (Willd.) Britton, Sterns & Poggenb.
    Polygonum convolvulus L.*+
        black-bindweed, false buckwheat
             Bilderdykia convolvulus (L.) Dumort.
             Fallopia convolvulus (L.) A.Löve
             Polygonum convolvulus L. var. convolvulus
             Reynoutria convolvulus (L.) Shinners
             Tiniaria convolvulus (L.) Webb. & Moq.
    Polygonum hydropiper L.*+
        marsh-pepper knotweed, water-pepper
             Persicaria hydropiper (L.) Opiz
             Polygonum hydropiper L. var. projectum Stanford
    Polygonum lapathifolium L.*+
        curly-top knotweed, dock-leaved smartweed, heart's-ease
             Persicaria incarnata (Elliott) Small
             Persicaria lapathifolia (L.) S.F.Gray
             Persicaria tomentosa (Schrank) E.P.Bicknell
             Polygonum incarnatum Elliott
             Polygonum incanum F.W.Schmidt
             Polygonum lapathifolium L. subsp. pallidum
             Polygonum lapathifolium L. var. incanum (F.W.Schmidt) W.D.J.Koch
             Polygonum lapathifolium L. var. lapathifolium
             Polygonum lapathifolium L. var. nodosum (Pers.) Small
             Polygonum lapathifolium L. var. ovatum A.Braun
             Polygonum lapathifolium L. var. prostratum Wimm.
             Polygonum lapathifolium L. var. salicifolium Sibth.
             Polygonum nodosum Pers.
             Polygonum oneillii Brenckle
             Polygonum pallidum With.
             Polygonum pensylvanicum L. subsp. oneillii
             Polygonum scabrum Moench
             Polygonum tomentosum Schrank
    Polygonum pensylvanicum L.*+
        Pennsylvania knotweed, Pennsylvania smartweed, pinkweed
             Persicaria bicornis (Raf.) Nieuwl.
             Persicaria longistyla (Small) Small
             Persicaria mississippiensis (Stanford) Small
             Persicaria pensylvanica (L.) M.Gómez
             Persicaria pensylvanica (L.) M.Gómez var. dura (Stanford) C.F.Reed
             Polygonum bicorne Raf.
             Polygonum longistylum Small
             Polygonum longistylum Small var. omissum (Greene) Stanford
             Polygonum mexicanum auct. non Small
             Polygonum mississippiense Stanford
             Polygonum mississippiense Stanford var. interius Stanford
             Polygonum omissum Greene
             Polygonum pensylvanicum L. var. durum Stanford
             Polygonum pensylvanicum L. var. eglandulosum J.C.Myers
             Polygonum pensylvanicum L. var. genuinum Fernald
             Polygonum pensylvanicum L. var. laevigatum Fernald
             Polygonum pensylvanicum L. f. albineum Farw. var. laevigatum Fernald
             Polygonum pensylvanicum L. f. pallescens Stanford var. laevigatum Fernald
             Polygonum pensylvanicum L. var. rosaeflorum Norton
    Polygonum persicaria L.*+
        heart's-ease, spotted lady's-thumb
             Persicaria maculata (Raf.) S.F.Gray
             Persicaria persicaria (L.) Small
             Persicaria ruderalis (Salisb.) C.F.Reed
             Persicaria ruderalis (Salisb.) C.F.Reed var. vulgaris (Webb & Moq.) C.F.Reed
             Persicaria vulgaris Webb & Moq.
             Polygonum dubium Stein
             Polygonum fusiforme Greene
             Polygonum minus auct. non Huds.
             Polygonum minus Huds. var. subcontinuum (Meisn.) Fernald
             Polygonum persicaria L. var. angustifolium Beckh.
             Polygonum persicaria L. var. ruderale (Salisb.) Meisn.
             Polygonum puritanorum Fernald
             Polygonum ruderale Salisb.
             Polygonum strictum Meisn. var. subcontinuum Meisn.
    Polygonum ramosissimum Michx.*+
        bushy knotweed
             Polygonum allocarpum S.F.Blake
             Polygonum atlanticum (B.L.Rob.) E.P.Bicknell
             Polygonum autumnale Brenckle
             Polygonum exsertum Small
             Polygonum interius Brenckle
             Polygonum ramosissimum Michx. f. atlanticum B.L.Rob.
             Polygonum ramosissimum Michx. var. ramosissimum
             Polygonum triangulum E.P.Bicknell
    Polygonum scandens L. var. cristatum (Engelm. & A.Gray) Gleason+
        climbing false buckwheat
             Bilderdykia cristata (Engelm. & A.Gray) Greene
             Bilderdykia scandens (L.) Greene var. cristata (Engelm. & A.Gray) C.F.Reed
             Polygonum cristatum Engelm. & A.Gray
             Reynoutria scandens (L.) Shinners var. cristata (Engelm. & A.Gray) Shinners
             Tiniaria cristata (Engelm. & A.Gray) Small
    Polygonum virginianum L.*+
        jumpseed, woodland knotweed
             Antenoron virginianum (L.) Roberty & Vautier
             Persicaria virginiana (L.) Gaertn.
             Polygonum virginianum L. var. glaberrimum (Fernald) Steyerm.
             Tovara virginiana (L.) Raf.
             Tovara virginiana (L.) Raf. var. glaberrima Fernald
  Genus: Rumex
    Rumex acetosella L.*+
        common sheep sorrel, field sorrel, red sorrel, sheep sorrel
             Acetosella acetosella (L.) Small
             Acetosella tenuifolia (Wallr.) A.Löve
             Acetosella vulgaris (Koch) Fourr.
             Rumex acetosella L. subsp. angiocarpus
             Rumex acetosella L. var. pyrenaeus (Pourr.) Timb.-Lagr.
             Rumex acetosella L. var. tenuifolius Wallr.
             Rumex angiocarpus Murb.
             Rumex tenuifolius (Wallr.) A.Löve
    Rumex altissimus A.W.Wood+
        pale dock, smooth dock, water dock
             Rumex britannicus Meisn., non L.
             Rumex ellipticus Greene
    Rumex crispus L.*+
        curly dock, sour dock
             Rumex elongatus Guss.
    Rumex maritimus L. subsp. fueginus*+
        golden dock
             Rumex fueginus Phil.
             Rumex maritimus L. var. athrix H.St.John
             Rumex maritimus L. var. fueginus (Phil.) Dusén
    Rumex salicifolius Weinm. var. mexicanus (Meisn.) C.L.Hitchc.+
        willow dock
             Rumex mexicanus Meisn.
             Rumex mexicanus Meisn. var. angustifolius (Meisn.) B.Boivin
             Rumex mexicanus Meisn. var. subarcticus (Lepage) B.Boivin
             Rumex mexicanus Meisn. var. triangulivalvis (Danser) Lepage
             Rumex quadrangulivalvis (Danser) Rech.f.
             Rumex salicifolius Weinm. subsp. triangulivalvis
             Rumex salicifolius Weinm. var. angustifolius Meisn.
             Rumex salicifolius Weinm. var. triangulivalvis (Danser) Hickman
             Rumex subarcticus Lepage
             Rumex triangulivalvis (Danser) Rech.f.
             Rumex triangulivalvis (Danser) Rech.f. var. oreolapathum Rech.f.
    Rumex verticillatus L.*+
        swamp dock, water dock
             Rumex fascicularis Small
             Rumex floridanus Meisn.
Family: Polypodiaceae
  Genus: Polypodium
    Polypodium virginianum L.*+
        common polypody, rock-cap fern, rock polypody
             Polypodium vinlandicum A.Löve & D.Löve
             Polypodium vulgare auct. pro parte, non L.
             Polypodium vulgare L. var. americanum Hook.
             Polypodium vulgare L. var. virginianum (L.) D.C.Eaton
Family: Portulacaceae
  Genus: Claytonia
    Claytonia virginica L.*+
        spring-beauty, Virginia spring-beauty
             Claytonia virginica L. var. hammondiae (Kalmb.) J.J.Doyle, W.H.Lewis & D.B.Snyder
             Claytonia virginica L. var. virginica
  Genus: Phemeranthus
    Phemeranthus rugospermus (Holz.) Kiger*+
        prairie fame-flower, rough-seeded fame-flower, sand fame-flower
             Talinum rugospermum Holz.
  Genus: Portulaca
    Portulaca oleracea L.*+
        common purslane, little hogweed, purslane, pusley
             Portulaca oleracea L. subsp. granulato-stellulata
             Portulaca oleracea L. subsp. nitida
Family: Potamogetonaceae
  Genus: Potamogeton
    Potamogeton crispus L.*+
        curled pondweed, curly pondweed
    Potamogeton foliosus Raf. subsp. foliosus*+
        leafy pondweed
             Potamogeton curtissii Morong
             Potamogeton foliosus Raf. var. foliosus
             Potamogeton foliosus Raf. var. genuinus Fernald
             Potamogeton foliosus Raf. var. macellus Fernald
    Potamogeton nodosus Poir.*+
        long-leaf pondweed, long-leaved pondweed
             Potamogeton americanus Cham. & Schltdl.
             Potamogeton fluitans auct. non Roth
    Potamogeton strictifolius A.Benn.*+
        narrow-leaved pondweed, stiff pondweed, straight-leaved pondweed
             Potamogeton pusillus L. var. rutiloides (Fernald) B.Boivin
             Potamogeton rutilus auct. non Wolfg.
             Potamogeton strictifolius A.Benn. var. rutiloides Fernald
             Potamogeton strictifolius A.Benn. var. typicus Fernald
    Potamogeton zosteriformis Fernald*+
        flat-stem pondweed, flat-stemmed pondweed
             Potamogeton compressus auct. non L.
             Potamogeton zosterifolius auct. non Schumach.
             Potamogeton zosterifolius Schumach. subsp. zosteriformis
             Potamogeton zosterifolius Schumach. var. americanus A.Benn.
  Genus: Stuckenia
    Stuckenia pectinata (L.) Börner*+
        comb pondweed, sago pondweed
             Coleogeton pectinatus (L.) Les & R.R.Haynes
             Potamogeton pectinatus L.
Family: Primulaceae
  Genus: Lysimachia
    Lysimachia ciliata L.*+
        fringed loosestrife
             Steironema ciliatum (L.) Baudo
             Steironema pumilum Greene
    Lysimachia hybrida Michx.+
        lowland yellow loosestrife, Mississippi-valley loosestrife, river loosestrife
             Lysimachia ciliata L. var. validula (Greene ex Wooton & Standl.) Kearney & Peebles
             Lysimachia lanceolata Walter subsp. hybrida
             Lysimachia lanceolata Walter var. hybrida (Michx.) A.Gray
             Steironema hybridum (Michx.) Raf. ex B.D.Jacks.
             Steironema laevigatum T.J.Howell
             Steironema lanceolatum (Walter) A.Gray var. hybridum (Michx.) A.Gray
             Steironema validulum Greene ex Wooton & Standl.
    Lysimachia nummularia L.*+
        creeping-Charlie, creeping-Jennie, moneywort
Family: Pteridaceae
  Genus: Adiantum
    Adiantum pedatum L.*+
        maidenhair fern, northern maidenhair fern
  Genus: Cheilanthes