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Families: 122
Genera: 523
Species: 1193 (species rank)
Total Taxa: 1279 (including subsp. and var.)

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Carex radiata (Wahlenb.) Small - straight-styled wood sedge
Carex retrorsa Schwein. - retrorse sedge
Carex richardsonii R.Br. - Richardson's sedge
Carex sparganioides Muhl. ex Willd. - loose-headed bracted sedge
Carex stricta Lam. - uptight sedge
Carex tenera Dewey - narrow-leaved oval sedge
Carex tonsa var. tonsa - smooth-fruited oak sedge
Carex trisperma Dewey - three-seeded sedge
Carex tuckermanii Dewey - Tuckerman's sedge
Carex utriculata Boott - Northwest Territory sedge
Cyperus bipartitus Torr. - slender flat sedge
Cyperus diandrus Torr. - umbrella flat sedge
Cyperus erythrorhizos Muhl. - red-rooted sedge
Cyperus odoratus L. - rusty flat sedge
Cyperus schweinitzii Torr. - Schweinitz's flat sedge
Cyperus strigosus L. - straw-colored cyperus
Eleocharis intermedia Schult. - matted spike-rush
Eriophorum vaginatum L. - tussock cotton-grass
Schoenoplectus pungens (Vahl) Palla - common three-square bulrush
Scirpus atrovirens Willd. - dark-green bulrush
Scirpus pendulus Muhl. - rufous bulrush
Drosera rotundifolia L. - round-leaved sundew
Cystopteris bulbifera (L.) Bernh. - bulblet fragile fern
Cystopteris fragilis (L.) Bernh. - northern fragile fern
Cystopteris tenuis (Michx.) Desv. - upland brittle bladder fern
Onoclea sensibilis L. - sensitive fern
Shepherdia argentea (Pursh) Nutt. - silver buffalo-berry
Shepherdia canadensis (L.) Nutt. - russet buffalo-berry
Equisetum sp. L. - Scouring-Rush
Equisetum arvense L. - field horsetail
Equisetum fluviatile L. - water horsetail
Equisetum hyemale - scouring rush horsetail
Equisetum laevigatum A.Braun - smooth scouring rush
Equisetum scirpoides Michx. - sedge horsetail
Epigaea repens L. - trailing-arbutus
Monotropa uniflora L. - Indian-pipe
Orthilia secunda (L.) House - one-sided wintergreen
Pyrola americana Sweet - round-leaved shin-leaf
Pyrola elliptica Nutt. - wax-flower shin-leaf
Vaccinium angustifolium Aiton - low sweet blueberry
Vaccinium myrtilloides Michx. - velvet-leaf huckleberry
Vaccinium oxycoccos L. - small cranberry
Acalypha gracilens subsp. gracilens - slender three-seeded-mercury
Euphorbia corollata L. - flowering spurge
Euphorbia cyparissias L. - graveyard spurge
Euphorbia glyptosperma Engelm. - ridge-seeded spurge
Euphorbia nutans Lag. - nodding spurge
Euphorbia peplus L. - petty spurge
Dalea purpurea - violet prairie-clover
Dalea purpurea var. purpurea - violet prairie-clover
Desmodium canadense (L.) DC. - showy tick-trefoil
Genista tinctoria L. - dyer's greenweed
Lathyrus latifolius L. - perennial pea-vine
Lathyrus palustris L. - slender-stem pea-vine
Lotus corniculatus L. - bird's-foot trefoil
Medicago lupulina L. - black medick
Melilotus albus Medik. - white sweet-clover
Melilotus officinalis (L.) Lam. - yellow sweet-clover
Robinia hispida L. - rose-acacia
Securigera varia (L.) Lassen - purple crown-vetch
Tephrosia virginiana (L.) Pers. - Virginia tephrosia
Trifolium aureum Pollich - yellow hop clover
Trifolium campestre Schreb. - pinnate hop clover
Trifolium dubium Sibth. - suckling clover
Trifolium hybridum L. - alsike clover
Trifolium incarnatum L. - crimson clover
Trifolium repens L. - white clover
Vicia villosa Roth - winter vetch
Quercus alba L. - white oak
Quercus bicolor Willd. - swamp white oak
Quercus rubra L. - northern red oak
Gentiana andrewsii var. andrewsii - prairie closed gentian
Gentianopsis crinita (Froel.) Ma - greater fringed gentian
Gentianopsis virgata (Raf.) Holub - small fringed gentian
Geranium maculatum L. - wild geranium
Geranium robertianum L. - Robert's geranium
Ribes americanum Mill. - wild black currant
Ribes cynosbati L. - prickly wild gooseberry
Ribes glandulosum Grauer - skunk currant
Ribes hirtellum Michx. - swamp gooseberry
Ribes lacustre (Pers.) Poir. - spiny swamp currant
Ribes missouriense Nutt. - wild gooseberry
Ribes nigrum L. - garden black currant
Ribes rubrum L. - garden red currant
Ribes triste Pall. - wild red currant
Myriophyllum sibiricum Kom. - short-spike water-milfoil
Myriophyllum spicatum L. - spike water-milfoil
Myriophyllum verticillatum L. - whorled water-milfoil
Hamamelis virginiana L. - American witch-hazel
Elodea canadensis Michx. - common waterweed
Najas marina L. - spiny naiad
Hypericum sp. L. - St. John's-Wort
Hypericum ascyron L. - great St. John's-wort
Hypericum majus (A.Gray) Britton - larger Canadian St. John's-wort
Hypericum perforatum L. - St. John's-wort
Hypericum punctatum Lam. - spotted St. John's-wort
Triadenum fraseri (Spach) Gleason - Fraser's marsh St. John's-wort
Hypoxis hirsuta (L.) Coville - yellow star-grass
Iris versicolor L. - northern blue flag
Sisyrinchium atlanticum E.P.Bicknell - eastern blue-eyed-grass
Sisyrinchium campestre E.P.Bicknell - prairie blue-eyed-grass
Sisyrinchium montanum Greene - strict blue-eyed grass
Sisyrinchium montanum var. montanum - strict blue-eyed grass
Sisyrinchium strictum E.P.Bicknell - mountain blue-eyed-grass
Carya ovata var. ovata - shellbark hickory
Juglans cinerea L. - white walnut
Juncus alpinoarticulatus Chaix - northern green rush
Juncus bufonius L. - toad rush
Juncus dudleyi Wiegand - Dudley's rush
Juncus effusus L. - soft rush
Juncus gerardii Loisel. - salt-meadow rush
Juncus nodosus L. - knotted rush
Juncus tenuis Willd. - poverty rush
Juncus torreyi Coville - Torrey's rush
Triglochin maritima L. - seaside arrow-grass
Triglochin palustris L. - slender bog arrow-grass
Hedeoma hispida Pursh - rough pennyroyal
Hedeoma pulegioides (L.) Pers. - American pennyroyal
Lamium purpureum L. - red dead-nettle
Lycopus asper Greene - rough water-horehound
Lycopus uniflorus Michx. - northern water-horehound
Mentha spicata L. - spearmint
Monarda fistulosa - wild bergamot
Salvia reflexa Hornem. - Rocky Mountain sage
Satureja hortensis L. - summer savory
Scutellaria lateriflora L. - mad-dog skullcap
Utricularia vulgaris L. - great bladderwort
Erythronium albidum Nutt. - white trout-lily
Erythronium americanum - yellow trout-lily
Lilium michiganense Farw. - Turk's-cap lily
Medeola virginiana L. - Indian cucumber-root
Linum perenne L. - wild blue flax
Linum sulcatum Riddell - grooved yellow flax
Diphasiastrum complanatum (L.) Holub - northern running-pine
Lycopodium clavatum L. - staghorn club-moss
Lythrum salicaria L. - spiked loosestrife
Althaea officinalis L. - common marsh mallow
Hibiscus trionum L. - flower-of-an-hour
Malva moschata L. - musk mallow
Malva neglecta Wallr. - common mallow
Malva pusilla Sm. - low mallow
Malva sylvestris L. - high mallow
Trillium cernuum L. - whip-poor-will flower
Menispermum canadense L. - common moonseed
Menyanthes trifoliata L. - common buckbean
Mollugo verticillata L. - Indian chickweed
Claytonia virginica L. - Virginia spring-beauty
Morus alba L. - white mulberry
Nuphar variegata Durand - bull-head pond-lily
Nymphaea odorata Aiton - fragrant water-lily
Circaea alpina subsp. alpina - small enchanter's-nightshade
Circaea canadensis (L.) Hill - broad-leaf enchanter's-nightshade
Circaea canadensis subsp. canadensis (L.) Hill - broad-leaf enchanter's-nightshade
Epilobium coloratum Biehler - eastern willow-herb
Epilobium leptophyllum Raf. - fen willow-herb
Oenothera biennis L. - common evening-primrose
Oenothera laciniata subsp. laciniata - ragged evening-primrose
Oenothera serrulata Nutt. - yellow sundrops
Botrychium simplex E.Hitchc. - small grape fern
Arethusa bulbosa L. - swamp-pink
Corallorhiza odontorhiza - small-flowered coralroot
Cypripedium acaule Aiton - small pink lady's-slipper
Cypripedium parviflorum Salisb. - yellow lady's-slipper
Cypripedium reginae Walter - showy lady's-slipper
Goodyera pubescens (Willd.) R.Br. - downy rattlesnake-plantain
Liparis loeselii (L.) Rich. - Loesel's twayblade
Malaxis unifolia Michx. - green adder's-mouth
Neottia cordata (L.) Rich. - heart-leaf twayblade
Platanthera huronensis (Nutt.) Lindl. - tall nothern bog orchid
Platanthera lacera (Michx.) G.Don - ragged fringed orchid
Platanthera orbiculata (Pursh) Lindl. - large round-leaved orchid
Platanthera psycodes (L.) Lindl. - lesser purple fringed orchid
Spiranthes casei var. casei - Case's lady's-tresses
Spiranthes cernua (L.) Rich. - nodding lady's-tresses
Spiranthes romanzoffiana Cham. - hooded lady's-tresses
Agalinis tenuifolia (Vahl) Raf. - common false foxglove
Melampyrum lineare Desr. - narrow-leaved cow-wheat
Orobanche fasciculata Nutt. - clustered broom-rape
Osmunda cinnamomea L. - cinnamon fern
Osmunda claytoniana L. - interrupted fern
Oxalis corniculata L. - creeping yellow wood-sorrel
Oxalis dillenii Jacq. - southern yellow wood-sorrel
Oxalis stricta L. - tall wood-sorrel
Oxalis violacea L. - violet wood-sorrel
Chelidonium majus L. - greater celandine
Dicentra cucullaria (L.) Bernh. - Dutchman's-breeches
Papaver rhoeas L. - Shirley's poppy
Penthorum sedoides L. - ditch stonecrop
Phryma leptostachya L. - American lop-seed
Pinus strobus L. - eastern white pine
Callitriche palustris L. - vernal water-starwort
Chelone glabra L. - white turtlehead
Linaria vulgaris Mill. - butter-and-eggs
Penstemon digitalis Nutt. ex Sims - tall white beard-tongue
Penstemon grandiflorus Nutt. - large-flowered beard-tongue
Penstemon hirsutus (L.) Willd. - northeastern beard-tongue
Plantago aristata Michx. - large-bracted plantain
Plantago media L. - dwarf plantain
Plantago rugelii Decne. - Rugel's plantain
Veronica arvensis L. - corn speedwell
Veronica peregrina L. - purslane speedwell
Veronica persica Poir. - bird's-eye speedwell
Veronica scutellata L. - skullcap speedwell
Agrostis stolonifera L. - creeping tickle grass
Alopecurus aequalis Sobol. - short-awned foxtail
Bromus ciliatus L. - fringed brome
Bromus erectus Huds. - meadow brome
Bromus inermis Leyss. - smooth brome
Bromus kalmii A.Gray - prairie brome
Bromus tectorum L. - June grass
Cinna arundinacea L. - stout wood-reed
Dactylis glomerata L. - orchard grass
Dichanthelium latifolium (L.) Harvill - broad-leaved panic grass
Elymus canadensis L. - Great Plains wild-rye
Elymus hystrix var. hystrix - glumeless wild-rye
Eragrostis minor Host - little love grass
Festuca myuros L. - rat-tail fescue
Festuca rubra L. - red fescue
Glyceria grandis S.Watson - reed manna grass
Glyceria septentrionalis Hitchc. - northern manna grass
Hordeum jubatum L. - squirrel-tail grass
Milium effusum L. - wood millet
Panicum virgatum L. - switch grass
Phalaris arundinacea L. - reed canary grass
Poa alsodes A.Gray - woodland bluegrass
Poa annua L. - speargrass
Poa compressa L. - wiregrass
Poa languida Hitchc. - weak bluegrass
Poa palustris L. - marsh bluegrass
Poa pratensis L. - Kentucky bluegrass
Polypogon interruptus Kunth - ditch polypogon
Polypogon monspeliensis (L.) Desf. - annual rabbit's-foot grass
Puccinellia distans (Jacq.) Parl. - weeping alkali grass
Sorghastrum nutans (L.) Nash - yellow Indian grass
Collomia linearis Nutt. - narrow-leaved mountain trumpet
Phlox pilosa L. - prairie phlox
Phlox subulata L. - moss-pink
Polemonium reptans var. reptans - spreading Jacob's-ladder