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Family: Poaceae
  Genus: Achnatherum

    Achnatherum hymenoides (Roem. & Schult.) Barkworth*
        Indian rice grass
             Eriocoma hymenoides (Roem. & Schult.) Rydb.
             Oryzopsis hymenoides (Roem. & Schult.) Ricker ex Piper
             Stipa hymenoides Roem. & Schult.
  Genus: Agropyron

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

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

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

    Ammophila breviligulata Fernald*+
        American beach-grass, dune grass, marram grass
             Ammophila champlainensis F.Seym.
  Genus: Andropogon

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

    Anthoxanthum odoratum L.*+
        sweet vernal grass
             Anthoxanthum odoratum L. subsp. odoratum
  Genus: Apera

    Apera interrupta (L.) P.Beauv.*+
        dense silkybent, silky bent grass
             Agrostis interrupta L.
  Genus: Aristida

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

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

    Avena fatua L.+
        wild oats
             Avena fatua L. var. glabrata Peterm.
             Avena fatua L. var. vilis (Wallr.) Hausskn.
    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: Avenula

    Avenula pubescens (Huds.) Dumort.
        downy alpine oatgrass
             Avena pubescens Huds.
             Helictotrichon pubescens (Huds.) Besser ex Pilg.
  Genus: Beckmannia

    Beckmannia syzigachne (Steud.) Fernald*+
        American slough grass
             Beckmannia eruciformis auct. non (L.) Host
             Beckmannia eruciformis (L.) Host subsp. baicalensis
             Beckmannia eruciformis (L.) Host var. uniflora Scribn. ex A.Gray
             Beckmannia syzigachne (Steud.) Fernald subsp. baicalensis
             Beckmannia syzigachne (Steud.) Fernald var. uniflora (Scribn. ex A.Gray) B.Boivin
             Panicum syzigachne Steud.
  Genus: Bouteloua

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

    Brachyelytrum aristosum (Michx.) Trel.+
        bearded shorthusk, long-awned wood grass, northern shorthusk
             Brachyelytrum aristosum (Michx.) Trel. var. glabratum Vasey ex Millsp.
             Brachyelytrum erectum (Schreb. ex Spreng.) P.Beauv. var. glabratum (Vasey ex Millsp.) T.Koyama & Kawano
             Brachyelytrum erectum (Schreb. ex Spreng.) P.Beauv. var. septentrionale Babel
             Brachyelytrum septentrionale (Babel) G.C.Tucker
    Brachyelytrum erectum (Schreb. ex Spreng.) P.Beauv.*+
        bearded shorthusk, long-awned wood grass
             Brachyelytrum erectum (Schreb. ex Spreng.) P.Beauv. var. erectum
  Genus: Briza

    Briza maxima L.*
        big quaking grass
    Briza media L.
        perennial quaking grass
  Genus: Bromus

    Bromus altissimus Pursh*+
        ear-leaved brome
             Bromus ciliatus sensu Baum, non L.
             Bromus latiglumis (Shear) Hitchc.
             Bromus latiglumis (Shear) Hitchc. f. incanus (Shear) Fernald
             Bromus purgans sensu Wagnon, non L.
    Bromus arvensis L.
        field brome
    Bromus brizaeformis Fisch. & C.A.Mey.
        rattlesnake brome
             Bromus briziformis Fisch. & C.A.Mey.
    Bromus ciliatus L.*+
        fringed brome
             Bromopsis ciliata (L.) Holub
             Bromus ciliatus L. f. ciliatus
             Bromus ciliatus L. f. denudatus Wiegand
             Bromus ciliatus L. var. ciliatus
             Bromus ciliatus L. var. denudatus (Wiegand) Fernald
             Bromus ciliatus L. var. genuinus Fernald
             Bromus ciliatus L. var. intonsus Fernald
             Bromus dudleyi Fernald
    Bromus commutatus Schrad.*+
        European brome, hairy chess, meadow brome
             Bromus commutatus Schrad. var. apricorum Simonk.
    Bromus erectus Huds.+
        erect brome, European brome, smooth brome
             Bromopsis erecta (Huds.) Fourr.
    Bromus hordeaceus L.+
        soft brome, soft chess
             Bromus hordeaceus L. subsp. hordeaceus
             Bromus mollis auct. 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 japonicus Thunb. ex Murray*+
        Japanese chess
             Bromus japonicus Thunb. ex Murray var. porrectus Hack.
             Bromus patulus Mert. & W.D.J.Koch
    Bromus kalmii A.Gray*+
        Arctic brome, ear-leaved brome, Kalm's brome, prairie brome
             Bromus ciliatus L. var. laeviglumis Scribn. ex Shear
             Bromopsis kalmii (A.Gray) Holub
             Bromus purgans L., nom. rejic.
             Bromus purgans L. var. laeviglumis (Scribn. ex Shear) Swallen
    Bromus marginatus Nees ex Steud. var. breviaristatus (Buckley) Beetle
        mountain brome
             Bromus breviaristatus Buckley
    Bromus pubescens Muhl. ex Willd.*+
        Canadian brome, hairy woodland brome
             Bromopsis pubescens (Muhl. ex Willd.) Holub
             Bromus purgans auct. mult. non L.
             Bromus purgans L. f. glabriflorus Wiegand
             Bromus purgans L. f. laevivaginatus Wiegand
    Bromus racemosus L.*+
        bald brome, cheat, smooth chess
    Bromus secalinus L.*+
        brome grass, cheat, chess, rye brome
             Bromus secalinus L. var. hirsutus Kindb.
             Bromus secalinus L. var. hirtus (F.W.Schultz) Hegi
    Bromus squarrosus L.+
        corn brome, downy brome, nodding brome
    Bromus sterilis L.
        barren brome, poverty brome
    Bromus tectorum L.*+
        cheat grass, downy brome, downy chess, June grass
    Bromus tectorum L. var. glabratus Spenn.*+
        cheat grass, downy brome, downy chess, June grass
             Bromus tectorum L. var. nudus Klett & Richter
    Bromus tectorum L. var. tectorum +
        cheat grass, downy brome, downy chess, June grass
  Genus: Buchloe

    Buchloe dactyloides (Nutt.) Engelm.*+
        buffalo grass
             Bulbilis dactyloides (Nutt.) Raf. ex Kuntze
             Sesleria dactyloides Nutt.
  Genus: Calamagrostis

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

    Calamovilfa longifolia (Hook.) Scribn.*+
        prairie sand-reed
    Calamovilfa longifolia (Hook.) Scribn. var. longifolia +
        prairie sand-reed
    Calamovilfa longifolia (Hook.) Scribn. var. magna Scribn. & Merr.*+
        prairie sand-reed, sand-reed grass
  Genus: Catabrosa

    Catabrosa aquatica (L.) P.Beauv.*+
        brook grass, water whorl-grass
             Aira aquatica L.
             Catabrosa aquatica (L.) P.Beauv. var. aquatica
             Catabrosa aquatica (L.) P.Beauv. var. uniflora S.F.Gray
  Genus: Cenchrus

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

    Chasmanthium latifolium (Michx.) H.O.Yates*+
        broad-leaf chasmanthium, Indian wood oats, wild oats
             Uniola latifolia Michx.
  Genus: Cinna

    Cinna arundinacea L.*+
        common wood-reed, sweet wood-reed, stout wood-reed
             Cinna arundinacea L. var. arundinacea
             Cinna arundinacea L. var. inexpansa Fernald & Griscom
    Cinna latifolia (Trevir. ex Göpp.) Griseb.*+
        drooping wood-reed
  Genus: Crypsis

    Crypsis schoenoides (L.) Lam.*+
        false-timothy, pickle grass, swamp pickle grass
             Heleochloa schoenoides (L.) Host ex Roem.
  Genus: Cynodon

    Cynodon dactylon (L.) Pers.
        Bermuda-grass
  Genus: Cynosurus

    Cynosurus cristatus L.*+
        crested dog's-tail grass, dog's-tail
  Genus: Dactylis

    Dactylis glomerata L.*+
        orchard grass
  Genus: Danthonia

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

    Deschampsia cespitosa (L.) P.Beauv.*+
        small-flowered tickle grass, tufted hair grass
             Deschampsia caespitosa (L.) P.Beauv. [orthographic variant]
    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
    Deschampsia cespitosa (L.) P.Beauv. subsp. glauca+
        tufted hair grass
             Deschampsia cespitosa (L.) P.Beauv. var. glauca (Hartm.) Lindm., non Regel
             Deschampsia glauca Hartm.
    Deschampsia cespitosa (L.) P.Beauv. subsp. parviflora+
        tufted hair grass
             Deschampsia cespitosa (L.) P.Beauv. var. parviflora (Thuill.) Coss. & Germ.
    Deschampsia flexuosa (L.) Trin.*+
        crinkled hair grass, wavy hair grass
             Aira flexuosa L.
             Lerchenfeldia flexuosa (L.) Schur
  Genus: Desmazeria

    Desmazeria rigida (L.) Tutin
        fern grass
             Catapodium rigidum (L.) C.E.Hubb. ex Dony
             Poa rigida L.
             Scleropoa rigida (L.) Griseb.
  Genus: Diarrhena

    Diarrhena americana P.Beauv. (sensu stricto)
        American beak grain, beak grass
    Diarrhena obovata (Gleason) Brandenb.*+
        obovate beak grain
             Diarrhena americana P.Beauv. var. obovata Gleason
  Genus: Dichanthelium

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

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

    Distichlis spicata (L.) Greene*+
        alkali grass, inland salt grass, spike grass
             Distichlis spicata (L.) Greene subsp. stricta
             Distichlis spicata (L.) Greene var. borealis (J.Presl) Beetle
             Distichlis spicata (L.) Greene var. divaricata Beetle
             Distichlis spicata (L.) Greene var. nana Beetle
             Distichlis spicata (L.) Greene var. spicata
             Distichlis spicata (L.) Greene var. stolonifera Beetle
             Distichlis spicata (L.) Greene var. stricta (Torr.) Beetle
             Distichlis stricta (Torr.) Rydb.
             Distichlis stricta (Torr.) Rydb. var. dentata (Rydb.) C.L.Hitchc.
             Uniola spicata L.
  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 esculenta (A.Braun) H.Scholtz
        Japanese millet
    Echinochloa muricata (P.Beauv.) Fernald*+
        American barnyard grass, barnyard grass, cockspur grass, rough barnyard grass
    Echinochloa muricata (P.Beauv.) Fernald var. microstachya Wiegand+
        rough barnyard grass
             Echinochloa microstachya (Wiegand) Rydb.
             Echinochloa muricata (P.Beauv.) Fernald var. wiegandii Fassett
             Echinochloa pungens (Poir.) Rydb. var. microstachya (Wiegand) Fernald & Griscom
             Echinochloa pungens (Poir.) Rydb. var. multiflora (Wiegand) Fernald & Griscom
             Echinochloa pungens (Poir.) Rydb. var. wiegandii Fassett
             Echinochloa wiegandii (Fassett) McNeill & Dore
    Echinochloa muricata (P.Beauv.) Fernald var. muricata +
        barnyard grass, cockspur grass, rough barnyard grass
             Echinochloa crus-galli (L.) P.Beauv. f. longiseta (Trin.) Farw.
             Echinochloa muricata (P.Beauv.) Fernald var. ludoviciana Wiegand
             Echinochloa pungens (Poir.) Rydb.
             Echinochloa pungens (Poir.) Rydb. var. ludoviciana (Wiegand) Fernald & Griscom
    Echinochloa walteri (Pursh) A.Heller*+
        coast barnyard grass, salt-marsh cockspur grass, water-millet
             Echinochloa walteri (Pursh) A.Heller f. laevigata Wiegand
             Panicum walteri Pursh
  Genus: Eleusine

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

    Elymus canadensis L.*+
        Canada wild-rye
             Elymus brachystachys Scribn. & Ball
             Elymus canadensis L. f. crescendus Ramaley
             Elymus canadensis L. f. glaucifolius (Muhl.) Fernald
             Elymus canadensis L. var. brachystachys (Scribn. & Ball) Farw.
             Elymus canadensis L. var. canadensis
             Elymus canadensis L. var. hirsutus (Farw.) Dorn
             Elymus canadensis L. var. robustus (Scribn. & J.G.Sm.) Mack. & Bush
             Elymus crescendus (Ramaley) L.C.Wheeler
             Elymus philadelphicus L.
             Elymus philadelphicus L. var. hirsutus Farw.
             Elymus robustus Scribn. & J.G.Sm.
    Elymus diversiglumis Scribn. & Ball+
        Minnesota wild-rye, unequal-glumed wild-rye
             Elymus canadensis L. var. interruptus (Buckley) Church
             Elymus interruptus of Amer. authors, not Buckley
    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 macgregorii R.E.Brooks & J.J.N.Campb.
        MacGregor's wild-rye
    Elymus riparius Wiegand*+
        riverbank wild-rye, streambank wild-rye
             Elymus canadensis L. var. riparius (Wiegand) B.Boivin
    Elymus submuticus (Hook.) Smyth*+
        awnless wild-rye
             Elymus curvatus Piper
             Elymus virginicus L. var. submuticus Hook.
    Elymus trachycaulus (Link) Gould ex Shinners*+
        slender wheat grass
    Elymus trachycaulus (Link) Gould ex Shinners subsp. subsecundus+
        bearded wheat grass, slender wheat grass
             Agropyron caninum (L.) P.Beauv. var. unilaterale (Cassidy) C.L.Hitchc.
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues var. glaucum (Pease & A.H.Moore) Taylor
             Agropyron subsecundum (Link) Hitchc.
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. ciliatum (Scribn. & J.G.Sm.) Malte
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. glaucum (Pease & A.H.Moore) Malte
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. unilaterale (Cassidy) Malte
             Elymus trachycaulus (Link) Gould ex Shinners subsp. glaucus
             Elymus trachycaulus (Link) Gould ex Shinners var. unilateralis (Cassidy) Beetle
             Triticum subsecundum Link
    Elymus trachycaulus (Link) Gould ex Shinners subsp. trachycaulus+
        slender wheat grass
             Agropyron brevifolium Scribn.
             Agropyron caninum (L.) P.Beauv. subsp. majus
             Agropyron caninum (L.) P.Beauv. var. andinum (Scribn. & J.G.Sm.) Pease & A.H.Moore
             Agropyron caninum (L.) P.Beauv. var. hornemannii (Koch) Pease & A.H.Moore
             Agropyron caninum (L.) P.Beauv. var. mitchellii Welsh
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues subsp. majus
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues subsp. novae-angliae
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues subsp. teslinense
             Agropyron pauciflorum (Schwein.) Hitchc. ex Silvues var. novae-angliae (Scribn.) Roy L.Taylor & MacBryde
             Agropyron subsecundum (Link) Hitchc. var. andinum (Scribn. & J.G.Sm.) Hitchc.
             Agropyron tenerum Vasey
             Agropyron teslinense Porsild & Senn
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. majus (Vasey) Fernald
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. novae-angliae (Scribn.) Fernald
             Agropyron trachycaulum (Link) Malte ex H.F.Lewis var. trachycaulum
             Agropyron violaceum (Hornem.) Lange subsp. andinum
             Agropyron violaceum (Hornem.) Lange var. andinum Scribn. & J.G.Sm.
             Elymus pauciflorus (Schwein.) Gould, non Lam.
             Elymus trachycaulus (Link) Gould ex Shinners subsp. andinus
             Elymus trachycaulus (Link) Gould ex Shinners subsp. novae-angliae
             Elymus trachycaulus (Link) Gould ex Shinners subsp. teslinensis
             Elymus trachycaulus (Link) Gould ex Shinners var. andinus (Scribn. & J.G.Sm.) Dorn
             Elymus trachycaulus (Link) Gould ex Shinners var. majus (Vasey) Beetle
             Roegneria pauciflora (Schwein.) Hyl.
             Roegneria trachycaula (Link) Nevski
             Triticum trachycaulum Link
    Elymus villosus Muhl. ex Willd.
        downy wild-rye, hairy wild-rye, silky wild-rye
    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.
        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
    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
    Elymus X ebingeri G.C.Tucker X +
        Ebinger's wild-rye
             Elymus hystrix L. X E. virginicus L.
    Elymus X maltei Bowden X +
             Elymus arenarius L. var. simulans (Bowden) B.Boivin
             Elymus X maltei Bowden var. brownii Bowden X
             Elymus X maltei Bowden var. churchii Bowden X
             Elymus X maltei Bowden var. simulans Bowden X
             Terrelymus maltei (Bowden) B.R.Baum
  Genus: Elytrigia

    Elytrigia dasystachya (Hook.) A.Löve & D.Löve+
        thick-spike wheat grass
    Elytrigia dasystachya (Hook.) A.Löve & D.Löve subsp. dasystachya+
        thick-spike wheat grass
             Agropyron dasystachyum (Hook.) Scribn.
             Agropyron dasystachyum (Hook.) Scribn. var. riparum (Scribn. & J.G.Sm.) Bowden
             Agropyron elmeri Scribn.
             Agropyron lanceolatum Scribn. & J.G.Sm.
             Agropyron riparum Scribn. & J.G.Sm.
             Agropyron riparium Scribn.& J.G.Sm.
             Elytrigia dasystachya (Hook.) A.Löve & D.Löve var. dasystachya
             Elymus lanceolatus (Scribn. & J.G.Sm.) Gould
             Elymus lanceolatus (Scribn. & J.G.Sm.) Gould subsp. lanceolatus
             Elymus lanceolatus (Scribn. & J.G.Sm.) Gould var. riparius (Scribn. & J.G.Sm.) Dorn
             Elytrigia riparia (Scribn. & J.G.Sm.) Beetle
    Elytrigia dasystachya (Hook.) A.Löve & D.Löve subsp. psammophila*+
        streambank wheat grass, thick-spike wheat grass
             Agropyron dasystachyum (Hook.) Scribn. subsp. psammophilum
             Agropyron dasystachyum (Hook.) Scribn. var. psammophilum (J.M.Gillett & Senn) E.G.Voss
             Agropyron psammophilium J.M.Gillett & Senn
             Elytrigia dasystachya (Hook.) A.Löve & D.Löve var. psammophila (J.M.Gillett & Senn) Cronquist
             Elymus lanceolatus (Scribn. & J.G.Sm.) Gould subsp. psammophilus
    Elytrigia repens (L.) Desv. ex B.D.Jacks.*+
        couchgrass, creeping quackgrass, quackgrass
             Agropyron acadiense F.T.Hubb.
             Agropyron repens (L.) P.Beauv.
             Agropyron repens (L.) P.Beauv. var. repens
             Agropyron repens (L.) P.Beauv. f. aristatum (Schumach.) Holmb. var. repens
             Agropyron repens (L.) P.Beauv. f. pilosum (Scribn.) Fernald var. repens
             Agropyron repens (L.) P.Beauv. f. trichorrhachis Rohlena var. repens
             Agropyron repens (L.) P.Beauv. var. subulatum (Schreb.) Roem. & Schult.
             Agropyron repens (L.) P.Beauv. f. setiferum Fernald var. subulatum (Schreb.) Roem. & Schult.
             Agropyron repens (L.) P.Beauv. f. heberhachis Fernald var. subulatum (Schreb.) Roem. & Schult.
             Agropyron repens (L.) P.Beauv. f. subulatum var. subulatum (Schreb.) Roem. & Schult.
             Agropyron repens (L.) P.Beauv. f. vaillantianum (Wulfen & Schreb.) Fernald var. subulatum (Schreb.) Roem. & Schult.
             Elymus repens (L.) Gould
             Elytrigia repens (L.) Desv. ex B.D.Jacks. var. repens
             Elytrigia repens (L.) Desv. ex B.D.Jacks. var. vaillantiana (Wulfen & Schreb.) Prokudin
             Triticum repens L.
    Elytrigia smithii (Rydb.) Nevski*+
        western wheat grass
             Agropyron molle (Scribn. & J.G.Sm.) Rydb.
             Agropyron smithii Rydb.
             Agropyron smithii Rydb. var. molle (Scribn. & J.G.Sm.) M.E.Jones
             Agropyron smithii Rydb. var. palmeri (Scribn. & J.G.Sm.) A.Heller
             Elymus smithii (Rydb.) Gould
             Elytrigia smithii (Rydb.) Nevski var. molle (Scribn. & J.G.Sm.) Beetle
             Pascopyrum smithii (Rydb.) A.Löve
    Elytrigia spicata (Pursh) D.R.Dewey
        bluebunch wheat grass
             Pseudoroegneria spicata (Pursh) A.Löve subsp. spicata
  Genus: Eragrostis

    Eragrostis capillaris (L.) Nees*+
        lace grass
    Eragrostis cilianensis (All.) Vignolo ex Janch.*+
        stink grass
             Eragrostis major Host
             Eragrostis megastachya (Koeler) Link
             Eragrostis megastachya (Koeler) Link var. acutiuscula Hack.
             Poa cilianensis All.
    Eragrostis frankii C.A.Mey. ex Steud.+
        sandbar love grass
             Eragrostis frankii C.A.Mey. ex Steud. var. brevipes Fassett
    Eragrostis hypnoides (Lam.) Britton, Sterns & Poggenb.*+
        creeping love grass, teal love grass
             Poa hypnoides Lam.
    Eragrostis mexicana (Hornem.) Link
        Mexican love grass
    Eragrostis mexicana (Hornem.) Link subsp. mexicana*+
        Mexican love grass, New Mexico love grass
             Eragrostis neomexicana Vasey
             Poa mexicana Hornem.
    Eragrostis minor Host*+
        little love grass
             Eragrostis eragrostis (L.) P.Beauv.
             Eragrostis poaeoides P.Beauv.
    Eragrostis pectinacea (Michx.) Nees
        Carolina love grass, low love grass, small love grass, tufted love grass
    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 pilosa (L.) P.Beauv.
        Indian love grass
    Eragrostis pilosa (L.) P.Beauv. var. pilosa *+
        Indian love grass
             Eragrostis multicaulis Steud.
             Eragrostis peregrina Wiegand
             Poa pilosa L.
    Eragrostis spectabilis (Pursh) Steud.*+
        purple love grass, tumble grass
             Eragrostis spectabilis (Pursh) Steud. var. sparsihirsuta Farw.
             Poa spectabilis Pursh
    Eragrostis trichodes (Nutt.) A.W.Wood*+
        sand love grass, tall love grass
  Genus: Eriochloa

    Eriochloa villosa (Thunb.) Kunth*+
        Chinese cup grass, hairy cup grass, woolly cup grass
             Paspalum villosum Thunb.
  Genus: Festuca

    Festuca arundinacea Schreb.*+
        reed fescue, rye grass, tall fescue
             Festuca elatior L. subsp. arundinacea
             Festuca elatior L. var. arundinacea (Schreb.) Wimm.
             Lolium arundinaceum (Schreb.) Darbysh.
    Festuca diffusa Dumort.*+
        spreading fescue
             Festuca multiflora Hoffm.
             Festuca rubra L. var. multiflora (Hoffm.) Asch. & Graebn.
    Festuca occidentalis Hook.*+
        western fescue
             Festuca ovina L. var. polyphylla Vasey
    Festuca paradoxa Desv.+
        cluster fescue
             Festuca nutans Biehler
             Festuca shortii Kunth ex Wood
    Festuca pratensis Huds.*+
        meadow fescue, meadow rye grass, rye grass
             Festuca elatior L., pro parte
             Lolium pratense (Huds.) Darbysh.
    Festuca rubra L.+
        red fescue
    Festuca rubra L. subsp. fallax+
        Chewing's fescue, red fescue
             Festuca fallax Thuill.
             Festuca rubra L. var. commutata Gaudin
             Festuca rubra L. var. fallax (Thuill.) P.Fourn.
    Festuca rubra L. subsp. rubra+
        red fescue
             Festuca rubra L. f. squarrosa (Fries) Holmb.
             Festuca rubra L. subsp. juncea
             Festuca rubra L. var. juncea (Hack.) K.Richt.
             Festuca rubra L. var. megastachys auct. non (Gaudin) Hegi
    Festuca saximontana Rydb.
        Rocky Mountain fescue
    Festuca saximontana Rydb. subsp. saximontana*+
        Rocky Mountain fescue
             Festuca brachyphylla Schult. ex Schult. & Schult.f. var. rydbergii (St.-Yves) Cronquist
             Festuca ovina L. var. rydbergii St.-Yves
             Festuca ovina L. var. saximontana (Rydb.) Gleason
             Festuca saximontana Rydb. var. saximontana
    Festuca subverticillata (Pers.) E.B.Alexeev*+
        nodding fescue
             Festuca obtusa Biehler
    Festuca trachyphylla (Hack.) Krajina*+
        hard fescue, sheep fescue
             Festuca cinerea auct. non Vill.
             Festuca duriuscula auct. non L.
             Festuca duriuscula L. var. cinerea auct. non (Vill.) Krajina
             Festuca longifolia auct. non Thuill.
             Festuca ovina L. var. duriuscula auct. non (L.) Koch
  Genus: Glyceria

    Glyceria borealis (Nash) Batch.*+
        northern manna grass
             Panicularia borealis Nash
    Glyceria canadensis (Michx.) Trin.*+
        rattlesnake grass, rattlesnake manna grass
             Panicularia canadensis (Michx.) Kuntze
    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
    Glyceria maxima (Hartm.) Holmb.*+
        English water grass, reed manna grass, tall manna grass
             Glyceria spectabilis Mert. & W.D.J.Koch
             Molinia maxima Hartm.
    Glyceria septentrionalis Hitchc.*+
        eastern manna grass, floating manna grass
             Panicularia septentrionalis (Hitchc.) E.P.Bicknell
    Glyceria striata (Lam.) Hitchc.*+
        fowl manna grass, fowl meadow grass
             Glyceria nervata (Willd.) Trin.
             Glyceria striata (Lam.) Hitchc. var. stricta (Scribn.) Fernald
             Glyceria striata (Lam.) Hitchc. var. striata
             Panicularia nervata (Willd.) Kuntze
             Panicularia nervata (Willd.) Kuntze var. parviglumis Scribn. & Merr.
             Poa nervata Willd.
    Glyceria X laxa (Scribn.) Scribn. X
        manna grass
             Glyceria canadensis (Michx.) Trin. var. laxa (Scribn.) Hitchc.
             Glyceria X ottawensis Bowden X
             Panicularia laxa Scribn.
  Genus: Hierochloe

    Hierochloe hirta (Schrank) Borbás
        sweet grass, vanilla grass
    Hierochloe hirta (Schrank) Borbás subsp. arctica*+
        northern sweet grass, vanilla grass
             Anthoxanthum hirtum (Schrank) Y.Schouten & Veldkamp subsp. arcticum
             Hierochloe arctica J.Presl
             Hierochloe odorata auct. non (L.) P.Beauv.
  Genus: Holcus

    Holcus lanatus L.*+
        velvet grass
  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.
    Hordeum pusillum Nutt.*+
        little barley
    Hordeum vulgare L.*+
        common barley
             Hordeum aegiceras Nees ex Royle
             Hordeum distichon L.
             Hordeum hexastichon L.
             Hordeum hexastichum L.
             Hordeum irregulare Ĺberg & Wiebe
             Hordeum sativum Pers.
             Hordeum vulgare L. var. trifurcatum (Schltdl.) Alef.
  Genus: Koeleria

    Koeleria macrantha (Ledeb.) Schult.*+
        June grass, prairie June grass
             Koeleria cristata auct. pro parte, non Pers.
             Koeleria cristata Pers. var. longifolia Vasey ex Burtt Davy
             Koeleria cristata Pers. var. pinetorum Abrams
             Koeleria gracilis Pers.
             Koeleria nitida Nutt.
             Koeleria pyramidata auct. pro parte, non (Lam.) P.Beauv.
             Koeleria yukonensis Hultén
  Genus: Leersia

    Leersia lenticularis Michx.*+
        catchfly grass
             Homalocenchrus lenticularis (Michx.) Kuntze
    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: Leptochloa

    Leptochloa fusca (L.) Kunth
        bearded sprangle-top
    Leptochloa fusca (L.) Kunth subsp. fascicularis*+
        bearded sprangle-top
             Diplachne acuminata Nash
             Diplachne fascicularis (Lam.) P.Beauv.
             Leptochloa acuminata (Nash) Mohlenbr.
             Leptochloa fascicularis (Lam.) A.Gray
             Leptochloa fascicularis (Lam.) A.Gray var. acuminata (Nash) Gleason
             Leptochloa fascicularis (Lam.) A.Gray var. fascicularis
  Genus: Leymus

    Leymus arenarius (L.) Hochst.*+
        lyme grass, sand rye grass
             Elymus arenarius L.
    Leymus mollis (Trin.) Hara subsp. mollis
        American dune grass
             Elymus arenarius L. subsp. mollis
             Elymus arenarius L. var. scabrinervis (Bowden) B.Boivin
             Elymus arenarius L. var. villosus E.Mey.
             Elymus capitatus Scribn.
             Elymus mollis Trin.
             Leymus arenarius (L.) Hochst. subsp. mollis
             Leymus mollis (Trin.) Hara var. mollis
  Genus: Lolium

    Lolium perenne L.*+
        English rye grass, perennial rye grass
    Lolium perenne L. subsp. multiflorum+
        Italian rye grass
             Lolium multiflorum Lam.
             Lolium multiflorum Lam. var. diminutum Mutel
             Lolium multiflorum Lam. var. muticum DC.
             Lolium multiflorum Lam. var. ramosum Guss. ex Arcang.
             Lolium perenne L. var. multiflorum (Lam.) Parn.
    Lolium perenne L. subsp. perenne+
        English rye grass, perennial rye grass
             Lolium perenne L. var. aristatum Willd.
             Lolium perenne L. var. cristatum Pers. ex B.D.Jacks.
             Lolium perenne L. var. perenne
  Genus: Melica

    Melica nitens (Scribn.) Nutt. ex Piper*+
        tall melic grass, three-flowered melic grass
    Melica smithii (Porter ex A.Gray) Vasey+
        Smith's melic grass
             Avena smithii Porter ex A.Gray
             Bromelica smithii (Porter ex A.Gray) Farw.
  Genus: Milium

    Milium effusum L.*+
        American millet grass, wood millet
             Milium effusum L. var. cisatlanticum Fernald
  Genus: Miscanthus

    Miscanthus sacchariflorus (Maxim.) Benth.*+
        Amur silver grass, Japanese plume grass
  Genus: Molinia

    Molinia caerulea (L.) Moench*+
        purple moor grass
  Genus: Muhlenbergia

    Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi*+
        alkali muhly, scratch grass
             Sporobolus asperifolius Nees & Meyen ex Trin.
    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 glomerata (Willd.) Trin.*+
        marsh muhly, marsh wild-Timothy, spiked muhly
             Muhlenbergia glomerata (Willd.) Trin. var. cinnoides (Link) F.J.Herm.
             Muhlenbergia racemosa (Michx.) Britton, Sterns & Poggenb. var. cinnoides (Link) B.Boivin
    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 richardsonis (Trin.) Rydb.*+
        mat muhly, soft-leaf muhly
             Muhlenbergia squarrosa (Trin.) Rydb.
    Muhlenbergia schreberi J.F.Gmel.*+
        nimble-will, nimble-will muhly
             Muhlenbergia palustris Scribn.
             Muhlenbergia schreberi J.F.Gmel. var. palustris (Scribn.) Scribn.
    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.
    Muhlenbergia sylvatica (Torr.) Torr. ex A.Gray*+
        forest muhly, woodland drop-seed, woodland satin grass
             Agrostis sylvatica Torr., non Huds.
             Muhlenbergia sylvatica (Torr.) Torr. ex A.Gray f. attenuata (Scribn.) E.J.Palmer & Steyerm.
             Muhlenbergia sylvatica (Torr.) Torr. ex A.Gray var. sylvatica
             Muhlenbergia umbrosa Scribn.
    Muhlenbergia tenuiflora (Willd.) Britton, Sterns & Poggenb.*+
        slender muhly, slender satin grass, woodland drop-seed
             Muhlenbergia tenuiflora (Willd.) Britton, Sterns & Poggenb. var. tenuiflora
    Muhlenbergia uniflora (Muhl.) Fernald*+
        bog muhly, one-flowered satin grass
             Muhlenbergia uniflora (Muhl.) Fernald var. terrae-novae Fernald
             Sporobolus uniflorus (Muhl.) Scribn. & Merr.
  Genus: Oryzopsis

    Oryzopsis asperifolia Michx.*+
        rough-leaved rice grass
    Oryzopsis canadensis (Poir.) Torr.*+
        Canada mountain rice grass, Canadian rice grass
             Stipa canadensis Poir.
    Oryzopsis pungens (Torr. ex Spreng.) Hitchc.*+
        mountain rice grass, short-horned rice grass
             Milium pungens Torr. ex Spreng.
    Oryzopsis racemosa (Sm.) Ricker ex Hitchc.*+
        black-seeded rice grass
             Milium racemosum Sm.
             Piptatherum racemosum Ricker ex Hitchc.
  Genus: Panicum

    Panicum capillare L.
        common witch grass, old-witch grass, witch grass
             Panicum capillare L. var. agreste Gatt.
    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.
        fall panic grass, knee grass
    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 flexile (Gatt.) Scribn.*+
        wiry panic grass, wiry witch grass
             Panicum capillare L. var. flexile Gatt.
    Panicum miliaceum L.*+
        broom-corn millet, hog millet, panic millet, proso millet, wild proso millet
    Panicum miliaceum L. subsp. miliaceum+
        broom-corn millet, hog millet, panic millet, proso millet, wild proso millet
    Panicum miliaceum L. subsp. ruderale+
        broom-corn millet
    Panicum philadelphicum Bernh. ex Trin.
        Philadelphia panic grass
             Panicum capillare L. var. sylvaticum Torr.
    Panicum philadelphicum Bernh. ex Trin. subsp. philadelphicum*
        Philadephia panic grass
             Panicum philadelphicum Bernh. ex Trin. var. tuckermanii (Fernald) Steyerm. & Schmoll
             Panicum tuckermanii Fernald
    Panicum rigidulum Bosc ex Nees
        red-top panic grass
    Panicum rigidulum Bosc. ex Nees subsp. rigidulum*+
        red-top panic grass
             Panicum agrostoides Spreng.
             Panicum agrostoides Spreng. var. ramosius (C.Mohr) Fernald
             Panicum elongatum Pursh var. ramosius C.Mohr
             Panicum rigidulum Bosc ex Nees var. rigidulum
    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 racemosum Lam.
        Peruvian paspalum
    Paspalum setaceum Michx.*+
        hairy bead grass, thin paspalum
    Paspalum setaceum Michx. var. muhlenbergii (Nash) D.J.Banks+
        hairy bead grass, hairy lens grass, hurrahgrass, Muhlenberg's hairy bead grass, thin paspalum
             Paspalum ciliatifolium Michx. var. muhlenbergii (Nash) Fernald
             Paspalum muhlenbergii Nash
             Paspalum pubescens Muhl. ex Willd.
             Paspalum setaceum Michx. var. calvescens Fernald
    Paspalum setaceum Michx. var. stramineum (Nash) D.J.Banks+
        downy lens grass, hairy bead grass, straw-colored hairy bead grass, yellow sand paspalum
             Paspalum bushii Nash
             Paspalum ciliatifolium Michx. var. stramineum (Nash) Fernald
             Paspalum stramineum Nash
  Genus: Pennisetum

    Pennisetum glaucum (L.) R.Br.+
        pearl millet
             Pennisetum spicatum (L.) Körn.
             Pennisetum typhoideum Rich.
  Genus: Phalaris

    Phalaris arundinacea L.*+
        reed canary grass
             Phalaroides arundinacea (L.) Raeusch.
             Phalaris arundinacea L. f. variegata (Parn.) Druce
             Phalaris arundinacea L. var. picta L.
             Phalaroides arundinacea (L.) Raeusch. var. picta (L.) Tzvelev
    Phalaris canariensis L.*+
        common canary grass
  Genus: Phleum

    Phleum pratense L.
        timothy
    Phleum pratense L. subsp. pratense*+
        common timothy, timothy
  Genus: Phragmites

    Phragmites australis (Cav.) Trin. ex Steud.*+
        common reed, common reed grass
    Phragmites australis (Cav.) Trin. ex Steud. subsp. americanus+
        common reed, common reed grass
    Phragmites australis (Cav.) Trin. ex Steud. subsp. australis+
        common reed, common reed grass
             Phragmites communis Trin.
             Phragmites phragmites (L.) H.Karst.
  Genus: Poa

    Poa alsodes A.Gray*
        grove bluegrass, woodland bluegrass
    Poa annua L.*
        annual bluegrass, speargrass
             Poa annua L. var. aquatica Asch.
             Poa annua L. var. reptans Hausskn.
    Poa bulbosa L.*
        bulbous bluegrass
    Poa compressa L.*
        Canada bluegrass, wiregrass
    Poa glauca Vahl
        glaucous bluegrass
             Poa glauca Vahl subsp. conferta
             Poa glauca Vahl subsp. glauca
             Poa glauca Vahl var. conferta (Blytt) Nannf.
             Poa glauca Vahl var. laxiuscula (Blytt) Lindm.
    Poa interior Rydb.
        inland bluegrass
             Poa nemoralis L. subsp. interior
             Poa nemoralis L. var. interior (Rydb.) Butters & Abbe
    Poa languida Hitchc.
        weak bluegrass
    Poa nemoralis L.*
        wood bluegrass
    Poa palustris L.*
        fowl meadow grass, marsh bluegrass
             Poa crocata Michx.
             Poa triflora Gilib.
    Poa paludigena Fernald & Wiegand*+
        bog bluegrass, marsh bluegrass, Patterson's bluegrass
    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
    Poa saltuensis Fernald & Wiegand*
        woodland bluegrass
             Poa debilis Torr.
             Poa saltuensis Fernald & Wiegand var. microlepis Fernald & Wiegand
    Poa sylvestris A.Gray*
        forest bluegrass, woodland bluegrass
    Poa trivialis L.*
        rough bluegrass
    Poa wolfii Scribn.
        Wolf's bluegrass
  Genus: Polypogon

    Polypogon interruptus Kunth*
        ditch polypogon
             Polypogon lutosus auct. non (Poir.) Hitchc.
    Polypogon monspeliensis (L.) Desf.
        annual rabbit's-foot grass
             Alopecurus monspeliensis L.
  Genus: Puccinellia

    Puccinellia distans (Jacq.) Parl.+
        European alkali grass, weeping alkali grass
    Puccinellia distans (Jacq.) Parl. subsp. borealis+
        European alkali grass, weeping alkali grass
             Phippsia nutkaensis (C.Presl) A.Löve & D.Löve subsp. borealis
             Phippsia sibirica (Holmb.) A.Löve & D.Löve
             Puccinellia coarctata Fernald & Weath.
             Puccinellia coarctata Fernald & Weath. var. pseudofasciculata T.J.Sorensen
             Puccinellia distans (Jacq.) Parl. var. angustifolia (Blytt) Holmb.
             Puccinellia sibirica Holmb.
    Puccinellia distans (Jacq.) Parl. subsp. distans*+
        European alkali grass, weeping alkali grass
             Poa distans Jacq.
             Puccinellia distans (Jacq.) Parl. var. tenuis (Uechtr.) Fernald & Weath.
             Puccinellia retroflexa (Curtis) Holmb.
             Puccinellia suksdorfii H.St.John
    Puccinellia fernaldii (Hitchc.) E.G.Voss*+
        Fernald's false manna grass
             Glyceria fernaldii (Hitchc.) H.St.John
             Glyceria pallida (Torr.) Trin. var. fernaldii Hitchc.
             Torreyochloa fernaldii (Hitchc.) Church
             Torreyochloa pallida (Torr.) Church var. fernaldii (Hitchc.) Dore ex T.Koyama & Kawano
    Puccinellia nuttalliana (Schult.) Hitchc.*+
        Nuttall's alkali grass
             Puccinellia airoides (Nutt.) S.Watson & J.M.Coult.
             Puccinellia cusickii Weath.
    Puccinellia pallida (Torr.) R.T.Clausen*+
        pale false manna grass
             Glyceria pallida (Torr.) Trin.
             Panicularia pallida (Torr.) Kuntze
             Torreyochloa pallida (Torr.) Church
             Torreyochloa pallida (Torr.) Church var. pallida
             Windsoria pallida Torr.
  Genus: Schedonnardus

    Schedonnardus paniculatus (Nutt.) Trel.
        tumble-grass
  Genus: Schizachne

    Schizachne purpurascens (Torr.) Swallen*+
        false melic grass
             Avena torreyi Nash
             Melica purpurascens (Torr.) Hitchc.
             Schizachne purpurascens (Torr.) Swallen var. pubescens Dore
             Schizachne purpurascens (Torr.) Swallen var. purpurascens
             Schizachne striata (Michx.) Hultén
             Trisetum purpurascens Torr.
  Genus: Schizachyrium

    Schizachyrium scoparium (Michx.) Nash*+
        broom beard grass, little blue-stem, prairie beard grass
    Schizachyrium scoparium (Michx.) Nash var. divergens (Hack.) Gould
        little blue-stem, pinehill blue-stem
             Andropogon divergens (Hack.) Andersson ex Hitchc.
             Andropogon scoparius Michx. var. divergens Hack.
             Andropogon scoparius Michx. var. virilis Shinners
             Schizachyrium scoparium (Michx.) Nash subsp. divergens
             Schizachyrium scoparium (Michx.) Nash var. virile (Shinners) Gould
    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: Secale

    Secale cereale L.*+
        rye
             Triticum cereale (L.) Salisb.
  Genus: Setaria

    Setaria faberi R.A.W.Herrm.*+
        Chinese foxtail, giant foxtail, Japanese bristle grass, nodding foxtail
    Setaria italica (L.) P.Beauv.*+
        foxtail bristle grass, foxtail millet
             Chaetochloa italica (L.) Scribn.
             Panicum italicum L.
             Setaria italica (L.) P.Beauv. var. metzeri (Körn.) Jáv.
             Setaria italica (L.) P.Beauv. var. stramineofructa (F.T.Hubb.) L.H.Bailey
    Setaria pumila (Poir.) Roem. & Schult.
        pigeon grass, yellow foxtail
    Setaria pumila (Poir.) Roem. & Schult. subsp. pumila*+
        pigeon grass, yellow foxtail
             Panicum pumilum Poir.
             Setaria glauca of Amer. authors, not (L.) P.Beauv.
             Setaria glauca auct. non (L.) P.Beauv., sensu Vickery
             Setaria lutescens of Amer. authors, not (Weigel) F.T.Hubb.
    Setaria verticillata (L.) P.Beauv.+
        bristly foxtail, hooked bristle grass
             Chaetochloa verticillata (L.) Scribn.
             Panicum verticillatum L.
             Setaria carnei Hitchc.
             Setaria decipiens Schimp. ex Nyman
             Setaria verticillata (L.) P.Beauv. var. verticillata
    Setaria verticilliformis Dumort.+
        barbed bristle grass
             Panicum verticillatum L. var. ambiguum Guss.
             Setaria gussonei Kerguélen
             Setaria verticillata (L.) P.Beauv. var. ambigua (Guss.) Parl.
             Setaria viridis (L.) P.Beauv. var. ambigua (Guss.) Coss. & Durieu
    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: Sorghum

    Sorghum bicolor (L.) Moench
        broom-corn, sorghum
             Sorghum guineense Stapf
             Sorghum nervosum Besser ex Schult.
    Sorghum bicolor (L.) Moench subsp. bicolor*+
        broom-corn, sorghum
             Holcus bicolor L.
             Holcus sorghum L.
             Sorghum bicolor (L.) Moench var. bicolor
             Sorghum bicolor (L.) Moench var. caffrorum (Retz.) Mohlenbr.
             Sorghum caffrorum (Retz.) P.Beauv.
             Sorghum cernuum (Ard.) Host
             Sorghum dochna (Forssk.) Snowden
             Sorghum dochna (Forssk.) Snowden var. technicum (Körn.) Snowden
             Sorghum durra (Forssk.) Stapf
             Sorghum saccharatum (L.) Moench
             Sorghum subglabrescens Schweinf. & Asch.
             Sorghum vulgare Pers.
             Sorghum vulgare Pers. var. caffrorum (Retz.) F.T.Hubb. & Rehder
             Sorghum vulgare Pers. var. durra (Forssk.) F.T.Hubb. & Rehder
             Sorghum vulgare Pers. var. roxburghii (Stapf) Haines
             Sorghum vulgare Pers. var. saccharatum (L.) Boerl.
             Sorghum vulgare Pers. var. technicum (Körn.) Jáv.
    Sorghum halepense (L.) Pers.*+
        Johnson grass
    Sorghum X almum Parodi (pro sp.) X +
        almum sorghum, Columbus grass
  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
    Sphenopholis obtusata (Michx.) Scribn.*+
        prairie wedge grass, prairie wedge scale
             Aira obtusata Michx.
             Sphenopholis obtusata (Michx.) Scribn. var. lobata (Trin.) Scribn.
             Sphenopholis obtusata (Michx.) Scribn. var. obtusata
             Sphenopholis obtusata (Michx.) Scribn. var. pubescens (Scribn. & Merr.) Scribn.
  Genus: Sporobolus

    Sporobolus clandestinus (Biehler) Hitchc.+
        hidden drop-seed, rough drop-seed, rough rush grass
             Sporobolus asper (Michx.) Kunth var. canovirens (Nash) Shinners
             Sporobolus asper (Michx.) Kunth var. clandestinus (Biehler) Shinners
             Sporobolus canovirens Nash
             Sporobolus clandestinus (Biehler) Hitchc. var. canovirens (Nash) Steyerm. & Kucera
             Sporobolus longifolius (Torr.) A.W.Wood
    Sporobolus compositus (Poir.) Merr.
        meadow drop-seed, rough drop-seed, tall drop-seed
    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
        poverty grass, poverty drop-seed, sheathed drop-seed
    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: Stipa

    Stipa comata Trin. & Rupr.*+
        needle-and-thread
             Hesperostipa comata (Trin. & Rupr.) Barkworth
             Hesperostipa comata (Trin. & Rupr.) Barkworth subsp. comata
             Stipa comata Trin. & Rupr. subsp. intonsa
             Stipa comata Trin. & Rupr. var. suksdorfii H.St.John
             Stipa comata Trin. & Rupr. var. comata
    Stipa spartea Trin.*+
        needle grass, porcupine grass
             Hesperostipa spartea (Trin.) Barkworth
    Stipa viridula Trin.*+
        green needle grass
             Nassella viridula (Trin.) Barkworth
  Genus: Tridens

    Tridens flavus (L.) Hitchc.
        purple-top
    Tridens flavus (L.) Hitchc. var. flavus *+
        purple-top
             Triodia flava (L.) Smyth
             Triodia flava (L.) Smyth f. cuprea (Jacq.) Fosberg
  Genus: Triplasis

    Triplasis purpurea (Walter) Chapm.*+
        purple sand grass
             Aira purpurea Walter
             Triplasis intermedia Nash
  Genus: Trisetum

    Trisetum melicoides (Michx.) Vasey ex Scribn.*+
        melic-oats, purple false oats
             Aira melicoides Michx.
             Graphephorum melicoideum (Michx.) Desv.
             Graphephorum melicoides (Michx.) P.Beauv. var. majus A.Gray
             Trisetum melicoides (Michx.) Vasey ex Scribn. var. majus (A.Gray) Hitchc.
    Trisetum spicatum (L.) K.Richt.*+
        narrow false oats, spike trisetum
             Aira spicata L.
             Trisetum spicatum (L.) K.Richt. subsp. alaskanum
             Trisetum spicatum (L.) K.Richt. subsp. congdonii
             Trisetum spicatum (L.) K.Richt. subsp. majus
             Trisetum spicatum (L.) K.Richt. subsp. molle
             Trisetum spicatum (L.) K.Richt. subsp. pilosiglume
             Trisetum spicatum (L.) K.Richt. var. alaskanum (Nash) Malte ex Louis-Marie
             Trisetum spicatum (L.) K.Richt. var. congdonii (Scribn. & Merr.) Hitchc.
             Trisetum spicatum (L.) K.Richt. var. maidenii (Gand.) Fernald
             Trisetum spicatum (L.) K.Richt. var. majus (Rydb.) Farw.
             Trisetum spicatum (L.) K.Richt. var. molle (Michx.) Beal
             Trisetum spicatum (L.) K.Richt. var. pilosiglume Fernald
             Trisetum spicatum (L.) K.Richt. var. spicatiforme Hultén
             Trisetum spicatum (L.) K.Richt. var. villosissimum (Lange) Louis-Marie
             Trisetum subspicatum (L.) P.Beauv.
             Trisetum triflorum (Bigelow) A.Löve & D.Löve
             Trisetum triflorum (Bigelow) A.Löve & D.Löve subsp. molle
             Trisetum villosissimum (Lange) Louis-Marie
  Genus: Triticum

    Triticum aestivum L.*+
        wheat
             Triticum hybernum L.
             Triticum macha Dekapr. & Menabde
             Triticum sativum Lam.
             Triticum sphaerococcum Percival
             Triticum vulgare Vill.
  Genus: Ventenata

    Ventenata dubia (Leers) Coss. & Durieu+
        soft-bearded oat grass, ventenata grass
             Avena dubia Leers
             Ventenata avenacea Koeler
  Genus: Vulpia

    Vulpia myuros (L.) C.C.Gmel.*+
        rat-tail fescue
             Festuca megalura Nutt.
             Festuca megalura Nutt. var. hirsuta (Hack.) Asch. & Graebn.
             Festuca myuros L.
             Vulpia megalura (Nutt.) Rydb.
             Vulpia myuros (L.) C.C.Gmel. var. hirsuta Hack.
    Vulpia octoflora (Walter) Rydb.
        six-weeks fescue
    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
    Vulpia octoflora (Walter) Rydb. var. octoflora
        six-weeks fescue
             Festuca octoflora Walter
             Festuca octoflora Walter var. octoflora
  Genus: Zea

    Zea mays L.
        corn
    Zea mays L. subsp. mays*+
        corn, Indian corn, maize
  Genus: Zizania

    Zizania aquatica L.*+
        annual wild rice, Indian rice, southern wild rice
             Zizania aquatica L. var. aquatica
    Zizania palustris L.*+
        northern wild rice
    Zizania palustris L. var. interior (Fassett) Dore+
        northern wild rice
             Zizania aquatica L. var. interior Fassett
             Zizania interior (Fassett) Rydb.
    Zizania palustris L. var. palustris +
        northern wild rice
             Zizania aquatica L. subsp. angustifolia
             Zizania aquatica L. var. angustifolia Hitchc.

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