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Families: 124
Genera: 493
Species: 1168 (species rank)
Total Taxa: 1267 (including subsp. and var.)

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Carex sterilis Willd. - fen star sedge
Carex stricta Lam. - uptight sedge
Carex sychnocephala J.Carey - many-headed sedge
Carex tenera Dewey - narrow-leaved oval sedge
Carex torreyi Tuck. - Torrey's sedge
Carex trichocarpa Willd. - hairy-fruit sedge
Carex trisperma Dewey - three-seeded sedge
Carex tuckermanii Dewey - Tuckerman's sedge
Carex woodii Dewey - Wood's stiff sedge
Cyperus bipartitus Torr. - slender flat sedge
Cyperus odoratus L. - rusty flat sedge
Cyperus schweinitzii Torr. - Schweinitz's flat sedge
Cyperus strigosus L. - straw-colored cyperus
Eleocharis compressa var. compressa - flat-stemmed spike-rush
Eleocharis elliptica Kunth - elliptic spike-rush
Eleocharis intermedia Schult. - matted spike-rush
Eriophorum vaginatum L. - tussock cotton-grass
Eriophorum virginicum L. - tawny cotton-grass
Rhynchospora alba (L.) Vahl - white beak-rush
Rhynchospora capillacea Torr. - needle beak sedge
Schoenoplectus pungens (Vahl) Palla - common three-square bulrush
Scirpus atrovirens Willd. - dark-green bulrush
Scirpus pendulus Muhl. - rufous bulrush
Drosera intermedia Hayne - spoon-leaf sundew
Drosera rotundifolia L. - round-leaved sundew
Cystopteris bulbifera (L.) Bernh. - bulblet fragile fern
Cystopteris tenuis (Michx.) Desv. - upland brittle bladder fern
Onoclea sensibilis L. - sensitive fern
Equisetum arvense L. - field horsetail
Equisetum fluviatile L. - water horsetail
Equisetum laevigatum A.Braun - smooth scouring rush
Monotropa uniflora L. - Indian-pipe
Pyrola americana Sweet - round-leaved shin-leaf
Pyrola elliptica Nutt. - wax-flower shin-leaf
Vaccinium myrtilloides Michx. - velvet-leaf huckleberry
Euphorbia corollata L. - flowering spurge
Euphorbia cyparissias L. - graveyard spurge
Euphorbia davidii Subils - David's spurge
Euphorbia nutans Lag. - nodding spurge
Amorpha fruticosa L. - indigo-bush
Baptisia lactea (Raf.) Thieret - white wild indigo
Baptisia leucophaea Nutt. - plains wild indigo
Caragana arborescens Lam. - Siberian pea-shrub
Cercis canadensis - eastern redbud
Dalea candida var. candida - white prairie-clover
Dalea purpurea var. purpurea - violet prairie-clover
Desmodium canadense (L.) DC. - showy tick-trefoil
Desmodium cuspidatum var. cuspidatum - large-bracted tick-trefoil
Desmodium illinoense A.Gray - prairie tick-trefoil
Desmodium perplexum B.G.Schub. - perplexed tick-trefoil
Gymnocladus dioicus (L.) K.Koch - Kentucky coffee-tree
Lathyrus sp. L. - Vetchling
Lathyrus palustris L. - slender-stem pea-vine
Lespedeza capitata Michx. - round-headed lespedeza
Lotus corniculatus L. - bird's-foot trefoil
Lupinus perennis L. - wild lupine
Medicago lupulina L. - black medick
Melilotus albus Medik. - white sweet-clover
Melilotus officinalis (L.) Lam. - yellow sweet-clover
Securigera varia (L.) Lassen - purple crown-vetch
Tephrosia virginiana (L.) Pers. - Virginia tephrosia
Trifolium arvense L. - rabbit-foot clover
Trifolium aureum Pollich - yellow hop clover
Trifolium campestre Schreb. - pinnate hop clover
Trifolium hybridum L. - alsike 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 virgata (Raf.) Holub - Great Plains fringed gentian
Geranium maculatum L. - wild geranium
Ribes americanum Mill. - wild black currant
Ribes cynosbati L. - prickly wild gooseberry
Ribes hirtellum Michx. - swamp gooseberry
Ribes missouriense Nutt. - wild gooseberry
Ribes rubrum L. - garden red currant
Ribes triste Pall. - wild red currant
Myriophyllum sp. L. - Water-Milfoil
Myriophyllum farwellii Morong - Farwell's water-milfoil
Myriophyllum heterophyllum Michx. - various-leaved water-milfoil
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 ascyron L. - great St. John's-wort
Hypericum kalmianum L. - Kalm's 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 pseudacorus L. - yellow water iris
Iris versicolor L. - northern blue flag
Sisyrinchium albidum Raf. - white blue-eyed-grass
Sisyrinchium campestre E.P.Bicknell - prairie blue-eyed-grass
Sisyrinchium strictum E.P.Bicknell - mountain blue-eyed-grass
Carya ovata - shellbark hickory
Carya ovata var. ovata - shellbark hickory
Juglans cinerea L. - white walnut
Juglans nigra L. - black walnut
Juncus alpinoarticulatus Chaix - northern green rush
Juncus bufonius L. - toad rush
Juncus canadensis J.Gay - Canadian rush
Juncus dudleyi Wiegand - Dudley's rush
Juncus effusus L. - soft rush
Juncus nodosus L. - knotted rush
Juncus tenuis Willd. - roadside rush
Juncus torreyi Coville - Torrey's rush
Triglochin maritima L. - seaside arrow-grass
Triglochin palustris L. - slender bog arrow-grass
Ajuga genevensis L. - standing bugle
Hedeoma hispida Pursh - rough pennyroyal
Hedeoma pulegioides (L.) Pers. - American pennyroyal
Lycopus asper Greene - rough water-horehound
Lycopus uniflorus Michx. - northern water-horehound
Monarda didyma L. - scarlet bee balm
Salvia nemorosa L. - woodland sage
Scutellaria lateriflora L. - mad-dog skullcap
Scutellaria ovata subsp. ovata - heart-leaved skullcap
Utricularia cornuta Michx. - naked bladderwort
Utricularia intermedia Hayne - northern bladderwort
Utricularia minor L. - small bladderwort
Utricularia vulgaris L. - great bladderwort
Erythronium albidum Nutt. - white trout-lily
Lilium michiganense Farw. - Turk's-cap lily
Linum sulcatum Riddell - grooved yellow flax
Lythrum hyssopifolia L. - hyssop loosestrife
Lythrum salicaria L. - spiked loosestrife
Hibiscus trionum L. - flower-of-an-hour
Malva neglecta Wallr. - common mallow
Malva pusilla Sm. - low mallow
Trillium cernuum L. - whip-poor-will flower
Trillium flexipes Raf. - nodding wake-robin
Menispermum canadense L. - common moonseed
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
Syringa vulgaris L. - common lilac
Circaea canadensis subsp. canadensis (L.) Hill - broad-leaf enchanter's-nightshade
Epilobium coloratum Biehler - eastern willow-herb
Epilobium leptophyllum Raf. - fen willow-herb
Epilobium strictum Muhl. ex Spreng. - northeastern willow-herb
Ludwigia polycarpa Short & R.Peter - top-pod water-primrose
Oenothera biennis L. - common evening-primrose
Oenothera parviflora L. - small-flowered evening-primrose
Oenothera perennis L. - small sundrops
Oenothera serrulata Nutt. - yellow sundrops
Oenothera villosa subsp. villosa - hairy evening-primrose
Ophioglossum pusillum Raf. - northern adder's-tongue
Cypripedium acaule Aiton - small pink lady's-slipper
Cypripedium reginae Walter - showy lady's-slipper
Cypripedium x andrewsii A.M.Fuller - Andrews' lady's-slipper
Goodyera pubescens (Willd.) R.Br. - downy rattlesnake-plantain
Liparis loeselii (L.) Rich. - Loesel's 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 cernua (L.) Rich. - nodding lady's-tresses
Spiranthes magnicamporum Sheviak - Great Plains lady's-tresses
Spiranthes romanzoffiana Cham. - hooded lady's-tresses
Agalinis paupercula (A.Gray) Britton - smooth false foxglove
Agalinis tenuifolia (Vahl) Raf. - common false foxglove
Aureolaria grandiflora var. pulchra Pennell - large-flowered yellow false foxglove
Castilleja coccinea (L.) Spreng. - scarlet painted-cup
Castilleja sessiliflora Pursh - downy painted-cup
Osmunda cinnamomea L. - cinnamon fern
Osmunda claytoniana L. - interrupted fern
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
Penthorum sedoides L. - ditch stonecrop
Phryma leptostachya L. - American lop-seed
Pinus strobus L. - eastern white pine
Antirrhinum majus L. - garden snapdragon
Chelone glabra L. - white turtlehead
Hippuris vulgaris L. - mare's tail
Linaria vulgaris Mill. - butter-and-eggs
Penstemon hirsutus (L.) Willd. - northeastern beard-tongue
Plantago aristata Michx. - large-bracted plantain
Plantago patagonica Jacq. - woolly plantain
Plantago rugelii Decne. - Rugel's plantain
Veronica arvensis L. - corn speedwell
Veronica peregrina L. - purslane speedwell
Veronica scutellata L. - skullcap speedwell
Agrostis stolonifera L. - creeping tickle grass
Alopecurus aequalis Sobol. - short-awned foxtail
Alopecurus pratensis L. - meadow foxtail
Anthoxanthum odoratum L. - sweet vernal grass
Aristida basiramea Engelm. ex Vasey - fork-tip three-awn grass
Avena fatua L. - wild oats
Bromus arvensis L. - fringed brome
Bromus ciliatus L. - fringed brome
Bromus inermis Leyss. - smooth brome
Bromus kalmii A.Gray - prairie brome
Bromus pubescens Muhl. ex Willd. - hairy woodland brome
Bromus tectorum L. - June grass
Calamagrostis stricta (Timm) Koeler - slim-stem small reed grass
Dactylis glomerata L. - orchard grass
Dichanthelium latifolium (L.) Harvill - broad-leaved panic grass
Dichanthelium perlongum (Nash) Freckmann - long-stalked panic grass
Digitaria cognata - fall witch grass
Elymus canadensis L. - Great Plains wild-rye
Elymus hystrix var. hystrix - glumeless wild-rye
Elymus riparius Wiegand - eastern riverbank wild-rye
Eragrostis minor Host - little love grass
Glyceria borealis (Nash) Batch. - boreal manna grass
Glyceria grandis S.Watson - reed manna grass
Glyceria septentrionalis Hitchc. - northern manna grass
Hordeum jubatum L. - squirrel-tail grass
Hordeum vulgare L. - common barley
Milium effusum L. - wood millet
Panicum miliaceum L. - wild proso millet
Panicum virgatum L. - switch grass
Phalaris arundinacea L. - reed canary grass
Poa compressa L. - Canada bluegrass
Poa nemoralis L. - wood bluegrass
Poa palustris L. - marsh bluegrass
Poa pratensis L. - Kentucky bluegrass
Poa trivialis L. - rough bluegrass
Puccinellia distans (Jacq.) Parl. - weeping alkali grass
Setaria faberi R.A.W.Herrm. - nodding foxtail
Sorghastrum nutans (L.) Nash - yellow Indian grass
Sporobolus neglectus Nash - small drop-seed
Zizania aquatica L. - southern wild rice
Phlox paniculata L. - summer phlox
Phlox pilosa L. - prairie phlox
Polemonium reptans var. reptans - spreading Jacob's-ladder