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Family: Anacardiaceae
  Genus: Toxicodendron

    Toxicodendron radicans (L.) Kuntze
        common eastern poison-ivy
             Rhus radicans L.
    Toxicodendron radicans (L.) Kuntze subsp. negundo*+
        common eastern poison-ivy, poison-ivy
             Toxicodendron negundo Greene
             Toxicodendron radicans (L.) Kuntze var. negundo (Greene) Reveal
Family: Apiaceae
  Genus: Eryngium

    Eryngium yuccifolium Michx.*+
        button eryngo, rattlesnake-master
Family: Asteraceae
  Genus: Aster

    Aster borealis (Torr. & A.Gray) Prov.*+
        northern bog aster, rush aster
             Aster franklinianus Rydb.
             Aster junceus auct. non Aiton
             Aster junciformis Rydb.
             Aster laxifolius Lindl. var. borealis Torr. & A.Gray
             Aster laxifolius Nees var. laetiflorus Torr. & A.Gray
             Symphyotrichum boreale (Torr. & A.Gray) A.Löve & D.Löve
    Aster borealis (Torr. & A.Gray) Prov. var. X A. lanceolatus Willd. var. simplex (Willd.) A.G.Jones+
             Aster borealis (Torr. & A.Gray) Prov. X A. simplex Willd.
    Aster borealis (Torr. & A.Gray) Prov. var. X A. pilosus Willd. var. pringlei (A.Gray) S.F.Blake+
             Aster borealis (Torr. & A.Gray) Prov. X A. pringlei (A.Gray) Britton
    Aster borealis (Torr. & A.Gray) Prov. X A. praealtus Poir.+
             Aster junciformis Rydb. X A. praealtus Poir.
    Aster ciliolatus Lindl.*+
        Lindley's aster, northern heart-leaved aster
             Aster ciliolatus Lindl. var. ciliolatus
             Aster lindleyanus Torr. & A.Gray
             Aster saundersii E.S.Burgess
             Symphyotrichum ciliolatum (Lindl.) A.Löve & D.Löve
    Aster ciliolatus Lindl. X A. lateriflorus (L.) Britton+
             Aster lateriflorus (L.) Britton X A. ciliolatus Lindl.
    Aster ciliolatus Lindl. X A. sagittifolius Wedem. ex Willd.+
             Aster ciliolatus Lindl. X A. urophyllus Lindl.
    Aster cordifolius L.*+
        common blue heart-leaved aster, common blue wood aster
             Aster cordifolius L. subsp. cordifolius
             Aster cordifolius L. var. cordifolius
             Aster cordifolius L. var. moratus (Shinners) Shinners
             Aster finkii Rydb. var. moratus Shinners
             Symphyotrichum cordifolium (L.) G.L.Nesom
    Aster cordifolius L. X A. lateriflorus (L.) Britton+
             Aster lateriflorus (L.) Britton X A. cordifolius L.
    Aster cordifolius L. X A. sagittifolius Wedem. ex Willd.+
             Aster cordifolius L. X A. urophyllus Lindl.
    Aster drummondii Lindl.+
        Drummond's aster, hairy heart-leaved aster
             Aster drummondii Lindl. subsp. drummondii
             Aster drummondii Lindl. var. drummondii
             Aster drummondii Lindl. var. rhodactis Benke
             Aster sagittifolius Wedem. ex Willd. var. drummondii (Lindl.) Shinners
             Symphyotrichum drummondii (Lindl.) G.L.Nesom
             Symphyotrichum drummondii (Lindl.) G.L.Nesom var. drummondii
    Aster drummondii Lindl. X A. sagittifolius Wedem. ex Willd.+
             Aster drummondii Lindl. X A. urophyllus Lindl.
    Aster dumosus L.
        bushy aster, long-stalked aster, rice-button aster
    Aster dumosus L. var. strictior Torr. & A.Gray+
        bushy aster, long-stalked aster, rice-button aster
             Symphyotrichum dumosum (L.) G.L.Nesom var. strictior (Torr. & A.Gray) G.L.Nesom
    Aster ericoides L.*+
        heath aster, squarrose white aster, white prairie aster
    Aster ericoides L. var. ericoides *+
        heath aster, squarrose white aster, white prairie aster
             Aster ericoides L. f. caeruleus (Benke) S.F.Blake
             Aster ericoides L. f. ericoides
             Aster ericoides L. f. gramsii Benke
             Aster ericoides L. subsp. ericoides
             Aster multiflorus Aiton
             Aster multiflorus Aiton var. caeruleus Benke
             Aster multiflorus Aiton var. exiguus Fernald
             Aster polycephalus Rydb.
             Aster scoparius DC.
             Lasallea ericoides (L.) Semple & Brouillet
             Symphyotrichum ericoides (L.) G.L.Nesom
             Symphyotrichum ericoides (L.) G.L.Nesom var. ericoides
             Virgulus ericoides (L.) Reveal & Keener
    Aster ericoides L. var. prostratus (Kuntze) S.F.Blake+
        prostrate heath aster
             Aster ericoides L. f. prostratus (Kuntze) Fernald
             Aster exiguus Rydb.
             Aster multiflorus Aiton var. prostratus Kuntze
             Symphyotrichum ericoides (L.) G.L.Nesom var. prostratum (Kuntze) G.L.Nesom
    Aster falcatus Lindl.
        cluster aster, white prairie aster
    Aster falcatus Lindl. var. commutatus (Torr. & A.Gray) A.G.Jones+
        cluster aster, white prairie aster
             Aster commutatus (Torr. & A.Gray) A.Gray
             Aster commutatus (Torr. & A.Gray) A.Gray var. polycephalus S.F.Blake
             Aster cordineri A.Nelson
             Aster ericoides L. var. commutatus (Torr. & A.Gray) B.Boivin, pro parte
             Aster falcatus Lindl. subsp. commutatus
             Aster multiflorus Aiton var. commutatus Torr. & A.Gray
             Symphyotrichum falcatum (Lindl.) G.L.Nesom var. commutatum (Torr. & A.Gray) G.L.Nesom
    Aster firmus Nees*+
        shining aster, shiny-leaved aster
             Aster lucidulus (A.Gray) Wiegand
             Aster lucidulus (A.Gray) Wiegand f. albiflorus (R.Hoffm.) Benke
             Aster lucidulus (A.Gray) Wiegand f. firmus (Nees) Deam
             Aster puniceus L. subsp. firmus
             Aster puniceus L. var. firmus (Nees) Torr. & A.Gray
             Aster puniceus L. f. lucidulus (A.Gray) Fernald var. firmus (Nees) Torr. & A.Gray
             Aster puniceus L. var. lucidulus A.Gray
             Symphyotrichum firmum (Nees) G.L.Nesom
    Aster firmus Nees X A. lanceolatus Willd.+
             Aster lanceolatus Willd. var. X A. puniceus L. var. firmus (Nees) Torr. & A.Gray
    Aster firmus Nees var. X A. lanceolatus Willd. var. simplex (Willd.) A.G.Jones+
             Aster firmus Nees X A. simplex Willd.
             Aster lucidulus (A.Gray) Wiegand X A. simplex Willd.
    Aster firmus Nees X A. praealtus Poir.+
             Aster praealtus Poir. X A. firmus Nees
             Aster praealtus Poir. X A. puniceus L. var. lucidulus A.Gray subsp.
    Aster fragilis Willd.
        fragile-stem aster
    Aster fragilis Willd. var. subdumosus (Wiegand) A.G.Jones*+
        fragile-stemmed aster
             Aster vimineus Lam. var. subdumosus Wiegand
             Symphyotrichum racemosum (Elliott) G.L.Nesom var. subdumosum (Wiegand) G.L.Nesom
    Aster furcatus E.S.Burgess*+
        forked aster, midwestern white heart-leaved aster
             Aster furcatus E.S.Burgess f. elaciniatus (Benke) Shinners
             Aster furcatus E.S.Burgess f. erythractis Benke
             Aster furcatus E.S.Burgess var. elaciniatus Benke
             Eurybia furcata (E.S.Burgess) G.L.Nesom
    Aster hesperius A.Gray+
        Western lined aster
             Aster hesperius A.Gray var. laetevirens (Greene) Cronquist
             Aster hesperius A.Gray var. wootonii Greene
             Aster laetevirens Greene
             Aster lanceolatus Willd. subsp. hesperius
             Aster osterhoutii Rydb.
             Aster wootonii (Greene) Greene
             Symphyotrichum hesperium (A.Gray) A.Löve & D.Löve
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom subsp. hesperium
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. hesperium subsp. hesperium
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. hesperium (A.Gray) G.L.Nesom
    Aster hesperius A.Gray var. X A. lanceolatus Willd. var. simplex (Willd.) A.G.Jones+
             Aster hesperius A.Gray X A. simplex Willd.
    Aster laevis L.
        smooth aster, smooth blue aster
             Aster laeviformis Rydb.
    Aster laevis L. var. laevis *+
        smooth aster, smooth blue aster
             Aster laevis L. f. amplifolius (Porter) Fernald
             Aster laevis L. f. latifolius (Porter) Shinners
             Aster laevis L. f. purpurascens (Farw.) Shinners
             Aster laevis L. var. amplifolius Porter
             Aster laevis L. var. falcatus Farw.
             Aster laevis L. f. purpurascens Farw. var. falcatus Farw.
             Aster laevis L. var. latifolius Porter
             Aster laevis L. var. thyrsoideus Farw.
             Symphyotrichum laeve (L.) A.Löve & D.Löve
             Symphyotrichum laeve (L.) A.Löve & D.Löve var. laeve
    Aster laevis L. X A. lanceolatus Willd.+
             Aster laevis L. X A. paniculatus Lam.
    Aster laevis L. X A. lateriflorus (L.) Britton+
             Aster laevis L. var. X A. lateriflorus (L.) Britton var. pendulus (Aiton) E.S.Burgess
             Aster lateriflorus (L.) Britton X A. laevis L.
    Aster lanceolatus Willd.*+
        eastern lined aster, panicled aster, white panicle aster
    Aster lanceolatus Willd. var. hirsuticaulis Semple & Chmiel. subsp. lanceolatus
        white panicle aster
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. hirsuticaule (Semple & Chmiel.) G.L.Nesom subsp. lanceolatum
    Aster lanceolatus Willd. var. latifolius Semple & Chmiel. subsp. lanceolatus
        white panicle aster
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. latiflorum (Semple & Chmiel.) G.L.Nesom subsp. lanceolatum
    Aster lanceolatus Willd. var. interior (Wiegand) A.G.Jones+
        inland panicled aster, panicled aster, white panicle aster
             Aster interior Wiegand
             Aster lanceolatus Willd. subsp. interior
             Aster lanceolatus Willd. var. interior (Wiegand) Semple & Chmiel. subsp. lanceolatus
             Aster simplex Willd. var. interior (Wiegand) Cronquist
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. interior (Wiegand) G.L.Nesom subsp. lanceolatum
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. interior (Wiegand) G.L.Nesom
    Aster lanceolatus Willd. var. interior (Wiegand) A.G.Jones X A. ontarionis Wiegand+
             Aster ontarionis Wiegand X A. tradescantii L.
    Aster lanceolatus Willd. var. interior (Wiegand) A.G.Jones X A. lanceolatus Willd. var. simplex (Willd.) A.G.Jones+
             Aster lanceolatus Willd. var. interior (Wiegand) Semple & Chmiel. X A. tradescantii L.
             Aster simplex Willd. X A. tradescantii L.
    Aster lanceolatus Willd. var. lanceolatus +
        eastern lined aster, marsh aster, panicled aster, white panicle aster
             Aster bellidiflorus Willd.
             Aster lamarckianus Nees
             Aster lanceolatus Willd. subsp. lanceolatus
             Aster lanceolatus Willd. var. lanceolatus subsp. lanceolatus
             Aster laxus Willd.
             Aster paniculatus Lam.
             Aster paniculatus Lam. var. bellidiflorus (Willd.) E.S.Burgess
             Aster simplex Willd. var. estuarinus B.Boivin
             Aster simplex Willd. var. ramosissimus (Torr. & A.Gray) Cronquist
             Aster tenuifolius sensu Torr. & A.Gray var. ramosissimus Torr. & A.Gray
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom subsp. lanceolatum
             Symphyotrichum lanceolatum (Willd.) G.L.Nesom var. lanceolatum subsp. lanceolatum
    Aster lanceolatus Willd. var. simplex (Willd.) A.G.Jones+
        branched panicled aster, panicled aster, white panicle aster
             Aster lanceolatus Willd. subsp. simplex
             Aster paniculatus Lam. var. simplex (Willd.) E.S.Burgess
             Aster simplex Willd.
             Symphyotrichum simplex (Willd.) A.Löve & D.Löve
    Aster lanceolatus Willd. var. simplex (Willd.) A.G.Jones X A. ontarionis Wiegand+
             Aster ontarionis Wiegand var. X A. lanceolatus Willd. var. simplex (Willd.) A.G.Jones
             Aster ontarionis Wiegand X A. simplex Willd.
             Aster paniculatus Lam. var. simplex (Willd.) E.S.Burgess X A. pantotrichus S.F.Blake
    Aster lanceolatus Willd. var. simplex (Willd.) A.G.Jones X A. puniceus L.+
             Aster puniceus L. X A. simplex Willd.
    Aster lanceolatus Willd. var. simplex (Willd.) A.G.Jones X A. prenanthoides Muhl. ex Willd.+
             Aster prenanthoides Muhl. ex Willd. var. X A. lanceolatus Willd. var. simplex (Willd.) A.G.Jones
             Aster prenanthoides Muhl. ex Willd. X A. simplex Willd.
    Aster lanceolatus Willd. var. simplex (Willd.) A.G.Jones X A. pilosus Willd.+
             Aster pilosus Willd. var. X A. lanceolatus Willd. var. simplex (Willd.) A.G.Jones
             Aster pilosus Willd. X A. simplex Willd.
    Aster lanceolatus Willd. X A. lateriflorus (L.) Britton+
             Aster lateriflorus (L.) Britton X A. lanceolatus Willd.
    Aster lanceolatus Willd. X A. puniceus L.+
             Aster paniculatus Lam. X A. puniceus L.
    Aster lateriflorus (L.) Britton*+
        calico aster, goblet aster, side-flowering aster
             Aster lateriflorus (L.) Britton var. glomerellus (Torr. & A.Gray) E.S.Burgess
             Aster miser L. var. glomerellus Torr. & A.Gray
    Aster lateriflorus (L.) Britton var. angustifolius Wiegand
        calico aster, goblet aster, side-flowering aster
             Symphyotrichum lateriflorum (L.) A.Löve & D.Löve var. angustifolium (Wiegand) G.L.Nesom
    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. horizontalis (Desf.) Farw.+
        calico aster, goblet aster, side-flowering aster
             Aster horizontalis Desf.
             Aster lateriflorus (L.) Britton var. pendulus (Aiton) E.S.Burgess
             Aster pendulus Aiton
             Symphyotrichum lateriflorum (L.) A.Löve & D.Löve var. horizontale (Desf.) G.L.Nesom
    Aster lateriflorus (L.) Britton var. lateriflorus +
        calico aster, goblet aster, side-flowering aster
             Aster vimineus Lam.
             Solidago lateriflora L.
             Symphyotrichum lateriflorum (L.) A.Löve & D.Löve
             Symphyotrichum lateriflorum (L.) A.Löve & D.Löve var. lateriflorum
    Aster linariifolius L.*+
        flax-leaved aster, stiff aster
             Aster linariifolius L. f. lateralis House
             Aster linariifolius L. f. leucactis Benke
             Aster linariifolius L. f. monocephalus House
             Aster linariifolius L. var. linariifolius
             Aster linariifolius L. var. victorinii Fernald
             Ionactis linariifolia (L.) Greene
    Aster longifolius Lam.*+
        long-leaved aster, long-leaved blue aster
             Aster eminens Willd.
             Aster junceus Aiton
             Aster salicifolius sensu Willd, non Lam.
             Symphyotrichum longifolium (Lam.) G.L.Nesom
             Symphyotrichum novi-belgii (L.) G.L.Nesom
             Symphyotrichum novi-belgii (L.) G.L.Nesom var. novi-belgii
    Aster macrophyllus L.*+
        big-leaved aster, large-leaved aster
             Aster ianthinus E.S.Burgess
             Aster macrophyllus L. f. eglandulosus Shinners
             Aster macrophyllus L. var. excelsior E.S.Burgess
             Aster macrophyllus L. var. ianthinus (E.S.Burgess) Fernald
             Aster macrophyllus L. var. macrophyllus
             Aster macrophyllus L. var. pinguifolius E.S.Burgess
             Aster macrophyllus L. var. sejunctus E.S.Burgess
             Aster macrophyllus L. var. velutinus E.S.Burgess
             Aster riciniatus E.S.Burgess
             Aster roscidus E.S.Burgess
             Aster violaris E.S.Burgess
             Eurybia macrophylla (L.) Cass.
    Aster modestus Lindl.
        northwestern sticky aster
             Canadanthus modestus (Lindl.) G.L.Nesom
             Weberaster modestus (Lindl.) A.Löve & D.Löve
    Aster novae-angliae L.*+
        New England aster
             Aster novae-angliae L. f. geneseensis House
             Aster novae-angliae L. f. rosarius House
             Aster novae-angliae L. f. roseus (Desf.) Britton
             Aster novae-angliae L. var. monocephalus Farw.
             Aster roseus Desf.
             Lasallea novae-angliae (L.) Semple & Brouillet
             Symphyotrichum novae-angliae (L.) G.L.Nesom
             Virgulus novae-angliae (L.) Reveal & Keener
    Aster oblongifolius Nutt.*+
        aromatic aster
             Aster kumleinii Fr. ex A.Gray
             Aster kumleinii Fr. ex A.Gray f. roseoligulatus Benke
             Aster kumleinii Fr. ex A.Gray var. oliganthemos Lunell
             Aster oblongifolius Nutt. f. roseoligulatus (Benke) Shinners
             Aster oblongifolius Nutt. var. angustatus Shinners
             Aster oblongifolius Nutt. var. oblongifolius
             Aster oblongifolius Nutt. var. orientis Shinners
             Aster oblongifolius Nutt. var. rigidulus A.Gray
             Lasallea oblongifolia (Nutt.) Semple & Brouillet
             Symphyotrichum oblongifolium (Nutt.) G.L.Nesom
             Virgulus oblongifolius (Nutt.) Reveal & Keener
    Aster ontarionis Wiegand*+
        bottomland aster, Ontario aster
             Aster diffusus Aiton var. thyrsoides A.Gray
             Aster lateriflorus (L.) Britton var. thyrsoides (A.Gray) E.Sheld.
             Aster missouriensis Britton, non Kuntze
             Aster missouriensis Britton var. thyrsoides (A.Gray) Wiegand
             Aster pantotrichus S.F.Blake
             Aster pantotrichus S.F.Blake var. thyrsoides (A.Gray) S.F.Blake
             Aster tradescantii L. var. thyrsoides (A.Gray) B.Boivin
             Symphyotrichum ontarione (Wiegand) G.L.Nesom
    Aster oolentangiensis Riddell*+
        azure aster, prairie heart-leaved aster, sky-blue aster
             Aster azureus Lindl.
             Aster azureus Lindl. f. incarnatus Farw.
             Aster oolentangiensis Riddell var. oolentangiensis
             Symphyotrichum oolentagiense (Riddell) G.L.Nesom
             Symphyotrichum oolentangiense (Riddell) G.L.Nesom var. oolentangiense
    Aster pilosus Willd.*+
        awl aster, frost aster, hairy aster, white old-field aster
    Aster pilosus Willd. var. pilosus *+
        awl aster, frost aster, hairy aster, white old-field aster
             Aster ericoides L. var. platyphyllus Torr. & A.Gray
             Aster ericoides L. var. villosus (Michx.) Torr. & A.Gray
             Aster pilosus Willd. f. pulchellus Benke
             Aster pilosus Willd. var. platyphyllus (Torr. & A.Gray) S.F.Blake
             Aster villosus Michx.
             Symphyotrichum pilosum (Willd.) G.L.Nesom
             Symphyotrichum pilosum (Willd.) G.L.Nesom var. pilosum
    Aster pilosus Willd. var. pringlei (A.Gray) S.F.Blake*+
        awl aster, frost aster, hairy aster, Pringle's aster, white old-field aster
             Aster ericoides L. var. pringlei A.Gray
             Aster faxonii Porter
             Aster pilosus Willd. var. demotus S.F.Blake
             Aster polyphyllus Willd., non Moench
             Aster pringlei (A.Gray) Britton
             Symphyotrichum pilosum (Willd.) G.L.Nesom var. pringlei (A.Gray) G.L.Nesom
    Aster praealtus Poir.+
        veiny lined aster, willow aster, willow-leaved aster
    Aster praealtus Poir. var. angustior Wiegand+
        veiny lined aster, willow aster, willow-leaved aster
             Aster praealtus Poir. var. subasper (Lindl.) Wiegand
             Symphyotrichum praealtum (Poir.) G.L.Nesom var. angustior (Wiegand) G.L.Nesom
    Aster praealtus Poir. var. coerulescens (DC.) A.G.Jones+
        veiny lined aster, willow aster, willow-leaved aster
             Aster coerulescens DC.
             Aster praealtus Poir. var. texicola Wiegand
             Symphyotrichum praealtum (Poir.) G.L.Nesom var. texicola (Wiegand) G.L.Nesom
    Aster praealtus Poir. var. praealtus
        willow-leaved aster
             Symphyotrichum praealtum (Poir.) G.L.Nesom
             Symphyotrichum praealtum (Poir.) G.L.Nesom var. praealtum
    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 schreberi Nees
        Schreber's aster
             Eurybia schreberi (Nees) Ness
    Aster sericeus Vent.*+
        silky aster, western silvery aster
             Aster sericeus Vent. f. albiligulatus Fassett
             Lasallea sericea (Vent.) Greene
             Symphyotrichum sericeum (Vent.) G.L.Nesom
             Virgulus sericeus (Vent.) Reveal & Keener
    Aster shortii Lindl.*+
        Midwestern blue heart-leaved aster, Short's aster
             Aster camptosorus Small
             Aster shortii Lindl. f. asper Shinners
             Aster shortii Lindl. f. candidus Benke
             Aster shortii Lindl. f. gronemanni Benke
             Aster shortii Lindl. var. monroei Benke
             Symphyotrichum shortii (Lindl.) G.L.Nesom
    Aster subulatus Michx.
        eastern annual saltmarsh aster
             Aster ensifer Bosser.
             Aster subulatus Michx. var. euroauster Fernald & Griscom
             Aster subulatus Michx. var. obtusifolius Fernald
             Symphyotrichum subulatum (Michx.) G.L.Nesom
    Aster umbellatus Mill.*+
        flat-top aster, parasol aster, tall flat-topped white aster
    Aster umbellatus Mill. var. pubens A.Gray+
        hairy flat-top aster, parasol aster
             Aster pubentior Cronquist
             Aster sericocarpoides (Small) K.Schum.
             Aster umbellatus Mill. var. latifolius A.Gray
             Doellingeria pubens (A.Gray) Rydb.
             Doellingeria sericocarpoides Small
             Doellingeria umbellata (Mill.) Nees subsp. pubens
             Doellingeria umbellata (Mill.) Nees var. latifolia (A.Gray) House
             Doellingeria umbellata (Mill.) Nees var. pubens (A.Gray) Britton
    Aster umbellatus Mill. var. umbellatus +
        flat-top aster, parasol aster, tall flat-topped white aster
             Doellingeria umbellata (Mill.) Nees
             Doellingeria umbellata (Mill.) Nees var. umbellata
    Aster X amethystinus Nutt. (pro sp.) X *+
        amethyst aster
             Aster amethystinus Nutt. f. leucerythros Bemis
             Aster amethystinus Nutt. f. leucos Bemis
             Lasallea X amethystina (Nutt.) Semple & Brouillet X
             Symphyotrichum X amethystinum (Nutt.) G.L.Nesom X
             Virgulus X amethystinus (Nutt.) Reveal & Keener X
    Aster X finkii Rydb. (pro sp.) X +
             Aster cordifolius L. X A. shortii Lindl.
             Aster finkii Rydb.
             Symphyotrichum X finkii (Rydb.) G.L.Nesom X
    Aster X longulus E.Sheld. (pro sp.) X +
             Aster borealis (Torr. & A.Gray) Prov. X A. puniceus L.
             Symphyotrichum X longulum (E.Shled.) G.L.Nesom X
  Genus: Boltonia

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

    Brachyactis ciliata (Ledeb.) Ledeb.
        alkali rayless aster
             Symphyotrichum ciliatum (Ledeb.) G.L.Nesom
    Brachyactis ciliata (Ledeb.) Ledeb. subsp. angusta*+
        alkali rayless aster
             Aster angustus (Lindl.) Torr. & A.Gray
             Aster brachyactis S.F.Blake
             Brachyactis angusta (Lindl.) Britton
             Tripolium angustum Lindl.
  Genus: Callistephus

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

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

    Heterotheca camporum (Greene) Shinners
        lemon-yellow false golden aster, prairie golden aster
             Chrysopsis camporum Greene
    Heterotheca villosa (Pursh) Shinners*+
        hairy golden aster
    Heterotheca villosa (Pursh) Shinners var. ballardii (Rydb.) Semple+
        hairy golden aster, telegraph-plant
             Chrysopsis ballardii Rydb.
    Heterotheca villosa (Pursh) Shinners var. minor (Hook.) Semple+
        hairy golden aster
             Chrysopsis bakeri Greene
             Chrysopsis villosa (Pursh) Nutt. var. hispida (Hook.) A.Gray
             Chrysopsis villosa (Pursh) Nutt. var. minor Hook.
             Chrysopsis wisconsinensis Shinners
             Diplopappus hispida Hook.
             Heterotheca villosa (Pursh) Shinners var. hispida (Hook.) V.L.Harms
             Heterotheca wisconsinensis (Shinners) Shinners
    Heterotheca villosa (Pursh) Shinners var. villosa +
        hairy golden aster
             Amellus villosus Pursh
             Chrysopsis mollis Nutt.
             Chrysopsis villosa (Pursh) Nutt.
             Chrysopsis villosa (Pursh) Nutt. var. villosa
  Genus: Parthenium

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

    Rudbeckia fulgida Aiton
        eastern coneflower, orange coneflower
    Rudbeckia fulgida Aiton var. speciosa (Wender.) Perdue+
        eastern coneflower, orange coneflower, showy coneflower
             Rudbeckia speciosa Wender.
  Genus: Solidago

    Solidago X bernardii B.Boivin X +
        Bernard's goldenrod, yellow stiff aster
             Aster X lutescens auct. non (Lindl. ex DC.) B.Boivin X
             Oligoneuron X bernardii (B.Boivin) G.L.Nesom X
  Genus: Tanacetum

    Tanacetum huronense Nutt.*+
        eastern tansy, Lake Huron tansy
             Chrysanthemum bipinnatum L. subsp. huronense
             Chrysanthemum huronense (Nutt.) Hultén
             Tanacetum bipinnatum (L.) Sch.Bip. subsp. huronense
             Tanacetum huronense Nutt. var. bifarium Fernald
             Tanacetum huronense Nutt. var. floccosum Raup
             Tanacetum huronense Nutt. var. huronense
             Tanacetum huronense Nutt. var. johannense Fernald
             Tanacetum huronense Nutt. var. terrae-novae Fernald
Family: Azollaceae
  Genus: Azolla

    Azolla caroliniana Willd.*+
        Carolina mosquito-fern, eastern mosquito-fern
Family: Betulaceae
  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: Mertensia

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

    Opuntia humifusa (Raf.) Raf.
        eastern prickly-pear cactus
    Opuntia humifusa (Raf.) Raf. var. humifusa *+
        eastern prickly-pear cactus
             Opuntia austrina Small
             Opuntia calcicola Wherry
             Opuntia compressa auct. non J.F.Macbr.
             Opuntia compressa J.F.Macbr. var. allairei (Griffiths) Weniger
             Opuntia compressa J.F.Macbr. var. austrina (Small) L.D.Benson
             Opuntia compressa J.F.Macbr. var. compressa
             Opuntia compressa J.F.Macbr. var. fuscoatra (Engelm.) Weniger
             Opuntia compressa J.F.Macbr. var. microsperma (Engelm. & Bigelow) L.D.Benson
             Opuntia humifusa (Raf.) Raf. var. ammophila (Small) L.D.Benson
             Opuntia humifusa (Raf.) Raf. var. austrina (Small) Dress
             Opuntia impedata Small ex Britton & Rose
             Opuntia opuntia (L.) H.Karst.
             Opuntia rafinesquei Engelm.
Family: Caesalpiniaceae
  Genus: Cercis

    Cercis canadensis L.
        eastern redbud
    Cercis canadensis L. var. canadensis *+
        eastern redbud
Family: Caryophyllaceae
  Genus: Stellaria

    Stellaria holostea L.+
        adder's-meat, Easter-bell
             Alsine holostea (L.) Britton
Family: Celastraceae
  Genus: Euonymus

    Euonymus atropurpurea Jacq.
        burning-bush, eastern wahoo
    Euonymus atropurpurea Jacq. var. atropurpurea *+
        burning-bush, eastern wahoo
             Evonymus atropurpurea Jacq.
Family: Cupressaceae
  Genus: Juniperus

    Juniperus virginiana L.
        eastern red-cedar
    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: Cyperaceae
  Genus: Carex

    Carex amphibola Steud.
        eastern narrow-leaved sedge
             Carex amphibola Steud. var. amphibola
    Carex blanda Dewey*+
        common wood sedge, eastern woodland sedge, wood sedge
             Carex blanda Dewey var. blanda
             Carex laxiflora Lam. var. blanda (Dewey) Boott
    Carex cryptolepis Mack.*+
        northeastern sedge, small yellow sedge
             Carex flava L. var. fertilis auct. non Peck
    Carex grisea Wahlenb.*+
        eastern narrow-leaved sedge, gray sedge
             Carex amphibola auct. mult.
             Carex amphibola Steud. var. turgida Fernald
    Carex radiata (Wahlenb.) Small*+
        eastern star sedge, straight-styled wood sedge
             Carex rosea Schkuhr ex Willd., misapplied
             Carex rosea Schkuhr ex Willd. var. radiata (Wahlenb.) Dewey
             Carex stellulata Gooden. var. radiata Wahlenb.
    Carex scabrata Schwein.*+
        eastern rough sedge
    Carex straminea Willd. ex Schkuhr*+
        awned oval sedge, eastern straw sedge, straw sedge
             Carex richii (Fernald) Mack.
             Carex straminea Willd. ex Schkuhr var. straminea
Family: Dennstaedtiaceae
  Genus: Dennstaedtia

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

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

    Elaeagnus angustifolia L.*+
        oleaster, Russian olive
Family: Ericaceae
  Genus: Gaultheria

    Gaultheria procumbens L.+
        checkerberry, eastern teaberry, wintergreen
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.
Family: Iridaceae
  Genus: Sisyrinchium

    Sisyrinchium atlanticum E.P.Bicknell*+
        eastern blue-eyed-grass
             Sisyrinchium apiculatum E.P.Bicknell
             Sisyrinchium apiculatum E.P.Bicknell var. mesochorum Nieuwl.
             Sisyrinchium corymbosum E.P.Bicknell
             Sisyrinchium flexile E.P.Bicknell
             Sisyrinchium mucronatum Michx. var. atlanticum (E.P.Bicknell) H.E.Ahles
             Sisyrinchium scoparium E.P.Bicknell
             Sisyrinchium tracyi E.P.Bicknell
             Sisyrinchium violaceum E.P.Bicknell
Family: Lentibulariaceae
  Genus: Utricularia

    Utricularia purpurea Walter*+
        eastern purple bladderwort, spotted bladderwort
             Vesiculina purpurea (Walter) Raf.
             Vesiculina saccata Raf.
    Utricularia resupinata B.D.Greene ex Bigelow*+
        northeastern bladderwort, resupinate bladderwort
             Lecticula resupinata (B.D.Greene ex Bigelow) Barnhart
Family: Liliaceae
  Genus: Camassia

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

    Epilobium coloratum Biehler*+
        cinnamon willow-herb, eastern willow-herb
    Epilobium strictum Muhl. ex Spreng.*+
        downy willow-herb, northeastern willow-herb
             Epilobium densum Raf.
             Epilobium molle Torr., non Lam.
Family: Orchidaceae
  Genus: Platanthera

    Platanthera leucophaea (Nutt.) Lindl.*+
        eastern prairie fringed orchid, prairie white fringed orchid
             Blephariglottis leucophaea (Nutt.) Farw.
             Habenaria leucophaea (Nutt.) A.Gray
             Habenaria leucophaea (Nutt.) A.Gray var. leucophaea
             Orchis leucophaea Nutt.
Family: Pinaceae
  Genus: Pinus

    Pinus strobus L.*+
        eastern white pine
             Strobus strobus (L.) Small
  Genus: Tsuga

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

    Elymus hystrix L.*+
        bottlebrush grass, eastern bottlebrush grass, glumeless wild-rye
    Elymus hystrix L. var. bigeloviana (Fernald) Bowden+
        Bigelow's bottlebrush grass, eastern bottlebrush grass
             Asperella hystrix (L.) Humb. var. bigeloviana Fernald
             Elymus hystrix L. f. bigelovianus (Fernald) Dore
             Hystrix patula Moench f. bigeloviana (Fernald) Gleason
             Hystrix patula Moench var. bigeloviana (Fernald) Deam
    Elymus hystrix L. var. hystrix *+
        bottlebrush grass, eastern bottlebrush grass, glumeless wild-rye
             Asperella hystrix (L.) Humb.
             Hystrix hystrix (L.) Millsp.
             Hystrix patula Moench
    Elymus virginicus L.
        common eastern wild-rye, Virginia wild-rye
    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
  Genus: Glyceria

    Glyceria septentrionalis Hitchc.*+
        eastern manna grass, floating manna grass
             Panicularia septentrionalis (Hitchc.) E.P.Bicknell
Family: Primulaceae
  Genus: Dodecatheon

    Dodecatheon meadia L.
        eastern shooting-star, pride-of-Ohio
    Dodecatheon meadia L. subsp. meadia*+
        eastern shooting-star, pride-of-Ohio
             Dodecatheon hugeri Small
             Dodecatheon meadia L. f. sedens Fassett
             Dodecatheon meadia L. var. genuinum Fassett
             Dodecatheon meadia L. var. meadia
             Dodecatheon meadia L. var. obesum Fassett
             Dodecatheon meadia L. var. stanfieldii (Small) Fassett
             Dodecatheon pauciflorum Greene
             Dodecatheon pulchellum Raf. subsp. pauciflorum
             Dodecatheon stanfieldii Small
Family: Pteridaceae
Family: Rosaceae
  Genus: Cotoneaster

    Cotoneaster divaricatus Rehder & E.H.Wilson
        spreading cotoneaster
    Cotoneaster lucidus Schltdl.*
        shiny cotoneaster
Family: Salicaceae
  Genus: Populus

    Populus deltoides Bartram ex Marshall
        eastern cottonwood
Family: Saxifragaceae
  Genus: Saxifraga

    Saxifraga pensylvanica L.*+
        eastern swamp saxifrage, swamp saxifrage, wild beet
             Micranthes pensylvanica (L.) Haw.
             Saxifraga crassicarpa A.M.Johnson
             Saxifraga forbesii Vasey
             Saxifraga forbesii Vasey f. bracteosa G.W.Burns
             Saxifraga pensylvanica L. f. fultior Fernald
             Saxifraga pensylvanica L. f. purpuripetala (A.M.Johnson) House
             Saxifraga pensylvanica L. subsp. eupensylvanica
             Saxifraga pensylvanica L. f. fultior (Fernald) G.W.Burns subsp. eupensylvanica
             Saxifraga pensylvanica L. subsp. interior
             Saxifraga pensylvanica L. var. crassicarpa (A.M.Johnson) G.W.Burns subsp. interior
             Saxifraga pensylvanica L. var. congesta G.W.Burns subsp. interior
             Saxifraga pensylvanica L. f. bracteata G.W.Burns var. crassicarpa (A.M.Johnson) G.W.Burns subsp. interior
             Saxifraga pensylvanica L. subsp. pensylvanica
             Saxifraga pensylvanica L. subsp. tenuirostrata
             Saxifraga pensylvanica L. var. crassicarpa (A.M.Johnson) Bush
             Saxifraga pensylvanica L. var. forbesii (Vasey) Engl. & Irmsch.
             Saxifraga pensylvanica L. var. fultior (Fernald) Bush
             Saxifraga pensylvanica L. var. purpuripetala (A.M.Johnson) Bush
             Saxifraga purpuripetala A.M.Johnson
Family: Scrophulariaceae
  Genus: Collinsia

    Collinsia verna Nutt.+
        eastern blue-eyed-Mary, spring blue-eyed-Mary
  Genus: Penstemon

    Penstemon hirsutus (L.) Willd.*+
        hairy beard-tongue, northeastern beard-tongue
             Penstemon hirsutus (L.) Willd. var. minimus R.W.Benn.
             Penstemon hirsutus (L.) Willd. var. pygmaeus R.W.Benn.
    Penstemon pallidus Small+
        eastern white beard-tongue, pale beard-tongue
             Penstemon arkansanus Pennell var. pubescens Pennell
             Penstemon brevisepalus Pennell
  Genus: Scrophularia

    Scrophularia marilandica L.*+
        carpenter's-square, eastern figwort, late figwort
             Scrophularia marilandica L. f. neglecta (Rydb. ex Small) Pennell
             Scrophularia neglecta Rydb. ex Small
Family: Solanaceae
  Genus: Solanum

    Solanum ptychanthum Dunal*+
        eastern black nightshade, West Indian nightshade
             Solanum americanum auct. non Mill.
             Solanum nigrum auct. non L.
Family: Thelypteridaceae
  Genus: Thelypteris

    Thelypteris palustris Schott
        eastern marsh fern, marsh fern
    Thelypteris palustris Schott var. pubescens (Lawson) Fernald*+
        eastern marsh fern, marsh fern
             Dryopteris thelypteris auct. non (L.) Sw.
             Dryopteris thelypteris (L.) A.Gray var. haleana (Fernald) M.Broun & Weath.
             Dryopteris thelypteris (L.) A.Gray var. pubescens (G.Lawson) Weath.
             Lastrea thelypteris (L.) Bory var. pubescens Lawson
             Thelypteris confluens (Thunb.) C.V.Morton var. pubescens (Lawson) Pringle
             Thelypteris palustris Schott var. haleana Fernald
Family: Thymelaeaceae
  Genus: Dirca

    Dirca palustris L.*+
        eastern leatherwood, rope-bark
Family: Violaceae
  Genus: Hybanthus

    Hybanthus concolor (T.F.Forst.) Spreng.*+
        eastern green-violet, green-violet
             Cubelium concolor (T.F.Forst.) Raf.
             Viola concolor T.F.Forst.
Family: Viscaceae
  Genus: Arceuthobium

    Arceuthobium pusillum Peck*+
        eastern dwarf mistletoe
             Razoumofskya pusilla (Peck) Kuntze

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