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Families: 117
Genera: 464
Species: 1097 (species rank)
Total Taxa: 1196 (including subsp. and var.)

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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 macrocarpon Aiton - large cranberry
Vaccinium oxycoccos L. - small cranberry
Euphorbia corollata L. - flowering spurge
Euphorbia cyparissias L. - graveyard 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
Dalea candida var. candida - white prairie-clover
Dalea purpurea var. purpurea - violet prairie-clover
Desmodium canadense (L.) DC. - showy tick-trefoil
Lathyrus palustris L. - slender-stem pea-vine
Lespedeza sp. Michx. - Bush-Clover
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
Trifolium arvense L. - rabbit-foot clover
Trifolium aureum Pollich - yellow hop clover
Trifolium campestre Schreb. - pinnate hop 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
Geranium sp. L. - Crane's-Bill
Geranium maculatum L. - wild geranium
Ribes sp. L. - Gooseberry
Ribes americanum Mill. - wild black currant
Ribes cynosbati L. - prickly wild gooseberry
Ribes glandulosum Grauer - skunk currant
Ribes hirtellum Michx. - swamp gooseberry
Ribes missouriense Nutt. - wild gooseberry
Ribes rubrum L. - garden red currant
Ribes triste Pall. - wild red currant
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
Hypericum ascyron L. - great St. John's-wort
Hypericum boreale (Britton) E.P.Bicknell - northern St. John's-wort
Hypericum canadense L. - lesser Canadian St. John's-wort
Hypericum ellipticum Hook. - pale 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 mutilum L. - weak St. John's-wort
Hypericum punctatum Lam. - spotted St. John's-wort
Triadenum sp. - Marsh St. John
Triadenum fraseri (Spach) Gleason - Fraser's marsh St. John's-wort
Triadenum virginicum (L.) Raf. - Virginia marsh St. John's-wort
Iris pseudacorus L. - yellow water iris
Iris versicolor L. - northern blue flag
Sisyrinchium campestre E.P.Bicknell - prairie blue-eyed-grass
Juglans cinerea L. - white walnut
Juncus alpinoarticulatus Chaix - northern green rush
Juncus articulatus L. - jointed rush
Juncus bufonius L. - toad rush
Juncus canadensis J.Gay - Canadian rush
Juncus dudleyi Wiegand - Dudley's rush
Juncus effusus L. - soft rush
Juncus interior Wiegand - interior rush
Juncus marginatus Rostk. - grassleaf rush
Juncus nodosus L. - knotted rush
Juncus pelocarpus E.Mey. - brown-fruited rush
Juncus tenuis Willd. - roadside rush
Juncus torreyi Coville - Torrey's rush
Luzula sp. - Wood-Rush
Dracocephalum parviflorum Nutt. - American dragonhead
Galeopsis tetrahit L. - hemp-nettle
Hedeoma hispida Pursh - rough pennyroyal
Lamium maculatum L. - variegated dead-nettle
Lycopus asper Greene - rough water-horehound
Lycopus uniflorus Michx. - northern water-horehound
Lycopus virginicus L. - Virginia water-horehound
Scutellaria lateriflora L. - mad-dog skullcap
Stachys tenuifolia - smooth hedge-nettle
Utricularia sp. - Bladderwort
Utricularia cornuta Michx. - naked bladderwort
Utricularia geminiscapa Benj. - twin-stemmed bladderwort
Utricularia gibba L. - humped bladderwort
Utricularia intermedia Hayne - northern bladderwort
Utricularia purpurea Walter - spotted bladderwort
Utricularia vulgaris L. - great bladderwort
Erythronium albidum Nutt. - white trout-lily
Lilium michiganense Farw. - Turk's-cap lily
Lindernia dubia (L.) Pennell - moist bank pimpernel
Diphasiastrum complanatum (L.) Holub - northern running-pine
Lycopodiella inundata (L.) Holub - northern bog club-moss
Lycopodium sp. L. - Bog Clubmoss
Lycopodium clavatum L. - staghorn club-moss
Lythrum salicaria L. - spiked loosestrife
Rotala ramosior (L.) Koehne - wheel-wort tooth-cup
Hibiscus trionum L. - flower-of-an-hour
Malva neglecta Wallr. - common mallow
Malva sylvestris L. - high mallow
Trillium cernuum L. - whip-poor-will flower
Menyanthes trifoliata L. - common buckbean
Mollugo verticillata L. - Indian chickweed
Claytonia virginica L. - Virginia spring-beauty
Myrica gale L. - sweet gale
Nuphar variegata Durand - bull-head pond-lily
Nymphaea odorata Aiton - fragrant water-lily
Circaea alpina subsp. alpina - small enchanter's-nightshade
Circaea canadensis subsp. canadensis (L.) Hill - broad-leaf enchanter's-nightshade
Epilobium ciliatum Raf. - hairy willow-herb
Epilobium coloratum Biehler - eastern willow-herb
Ludwigia polycarpa Short & R.Peter - top-pod water-primrose
Oenothera parviflora L. - small-flowered evening-primrose
Oenothera perennis L. - small sundrops
Oenothera villosa subsp. villosa - hairy evening-primrose
Ophioglossum pusillum Raf. - northern adder's-tongue
Arethusa bulbosa L. - swamp-pink
Cypripedium acaule Aiton - small pink 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
Platanthera clavellata (Michx.) Luer - small green fringed orchid
Platanthera huronensis (Nutt.) Lindl. - tall nothern bog orchid
Platanthera lacera (Michx.) G.Don - ragged fringed 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
Agalinis paupercula (A.Gray) Britton - smooth false foxglove
Agalinis tenuifolia (Vahl) Raf. - common false foxglove
Aureolaria pedicularia (L.) Raf. - clammy false foxglove
Castilleja coccinea (L.) Spreng. - scarlet painted-cup
Melampyrum lineare Desr. - narrow-leaved cow-wheat
Orobanche uniflora L. - one-flowered 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
Dicentra cucullaria (L.) Bernh. - Dutchman's-breeches
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
Gratiola neglecta Torr. - clammy hedge-hyssop
Linaria vulgaris Mill. - butter-and-eggs
Penstemon digitalis Nutt. ex Sims - tall white beard-tongue
Penstemon gracilis Nutt. - slender beard-tongue
Penstemon grandiflorus Nutt. - large-flowered beard-tongue
Plantago aristata Michx. - large-bracted plantain
Plantago patagonica Jacq. - woolly plantain
Veronica arvensis L. - corn speedwell
Veronica peregrina L. - purslane speedwell
Veronica scutellata L. - skullcap speedwell
Veronica serpyllifolia L. - thyme-leaved speedwell
Veronica verna L. - spring speedwell
Agrostis stolonifera L. - creeping tickle grass
Alopecurus aequalis Sobol. - short-awned foxtail
Alopecurus pratensis L. - meadow foxtail
Aristida basiramea Engelm. ex Vasey - fork-tip three-awn grass
Aristida tuberculosa Nutt. - seaside three-awn
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
Cinna arundinacea L. - stout wood-reed
Dactylis glomerata L. - orchard grass
Dichanthelium latifolium (L.) Harvill - broad-leaved panic grass
Dichanthelium linearifolium (Scribn.) Gould - slender-leaved panic grass
Dichanthelium perlongum (Nash) Freckmann - long-stalked panic grass
Digitaria cognata - fall witch grass
Elymus canadensis L. - Great Plains wild-rye
Elymus curvatus Piper - awnless wild-rye
Elymus hystrix L. - glumeless wild-rye
Elymus hystrix var. hystrix - glumeless wild-rye
Elymus riparius Wiegand - eastern riverbank wild-rye
Elymus wiegandii Fernald - Wiegand's wild-rye
Eragrostis minor Host - little love grass
Festuca rubra L. - red fescue
Glyceria borealis (Nash) Batch. - boreal manna grass
Glyceria grandis S.Watson - reed manna grass
Hordeum jubatum L. - squirrel-tail grass
Hordeum vulgare L. - common barley
Lolium perenne L. - perennial rye grass
Lolium perenne subsp. perenne - perennial rye grass
Milium effusum L. - wood millet
Molinia caerulea (L.) Moench - purple moor grass
Muhlenbergia uniflora (Muhl.) Fernald - one-flowered satin grass
Panicum miliaceum L. - wild proso millet
Panicum virgatum L. - switch grass
Paspalum setaceum Michx. - thin paspalum
Phalaris arundinacea L. - reed canary grass
Phalaris canariensis L. - common canary grass
Poa alsodes A.Gray - woodland bluegrass
Poa annua L. - speargrass
Poa bulbosa L. - bulbous bluegrass
Poa compressa L. - wiregrass
Poa nemoralis L. - wood bluegrass
Poa paludigena Fernald & Wiegand - Patterson's bluegrass
Poa palustris L. - marsh bluegrass
Poa pratensis L. - Kentucky bluegrass
Poa trivialis L. - rough bluegrass
Setaria faberi R.A.W.Herrm. - nodding foxtail
Setaria verticillata (L.) P.Beauv. - hooked bristle grass
Sorghastrum nutans (L.) Nash - yellow Indian grass
Torreyochloa fernaldii (Hitchc.) Church - Fernald's false manna grass
Zizania aquatica L. - southern wild rice
Zizania palustris L. - northern wild rice
Phlox pilosa L. - prairie phlox
Phlox subulata L. - moss-pink
Polemonium reptans var. reptans - spreading Jacob's-ladder
Polygala sanguinea L. - purple milkwort
Fagopyrum esculentum Moench - common buckwheat
Fallopia cilinodis (Michx.) Holub - fringed black bindweed
Fallopia scandens (L.) Holub - climbing false buckwheat
Persicaria arifolia (L.) Haraldson - Halberd-leaf tearthumb
Persicaria maculosa Gray - spotted lady's-thumb
Polygonum tenue Michx. - slender knotweed
Rumex acetosella L. - sheep sorrel
Rumex britannica L. - British dock
Pontederia cordata L. - pickerel-weed
Potamogeton amplifolius Tuck. - large-leaved pondweed
Potamogeton bicupulatus Fernald - snail-seed pondweed
Potamogeton crispus L. - curly pondweed
Potamogeton diversifolius Raf. - water-thread pondweed
Potamogeton epihydrus Raf. - ribbon-leaved pondweed
Potamogeton gramineus L. - variable-leaved pondweed
Potamogeton natans L. - floating-leaf pondweed
Potamogeton nodosus Poir. - long-leaved pondweed
Potamogeton robbinsii Oakes - Robbins' pondweed
Potamogeton spirillus Tuck. - spiral-fruited pondweed
Potamogeton strictifolius A.Benn. - straight-leaved pondweed
Potamogeton zosteriformis Fernald - flat-stemmed pondweed
Androsace occidentalis Pursh - western rock jasmine
Lysimachia ciliata L. - fringed loosestrife