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Families: 109
Genera: 401
Species: 835 (species rank)
Total Taxa: 853 (including subsp. and var.)

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Nuphar variegata Durand - bull-head pond-lily
Nymphaea odorata Aiton - fragrant water-lily
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
Oenothera biennis L. - common evening-primrose
Oenothera nuttallii Sweet - white evening-primrose
Oenothera parviflora L. - small-flowered evening-primrose
Ophioglossum pusillum Raf. - northern adder's-tongue
Cypripedium acaule Aiton - small pink lady's-slipper
Liparis loeselii (L.) Rich. - Loesel's twayblade
Platanthera huronensis (Nutt.) Lindl. - tall nothern bog orchid
Platanthera psycodes (L.) Lindl. - lesser purple fringed orchid
Spiranthes cernua (L.) Rich. - nodding lady's-tresses
Agalinis tenuifolia (Vahl) Raf. - common false foxglove
Osmunda cinnamomea L. - cinnamon fern
Osmunda claytoniana L. - interrupted fern
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
Chelone glabra L. - white turtlehead
Hippuris vulgaris L. - mare's tail
Linaria vulgaris Mill. - butter-and-eggs
Plantago patagonica Jacq. - woolly plantain
Plantago rugelii Decne. - Rugel's plantain
Veronica longifolia L. - long-leaved speedwell
Veronica scutellata L. - skullcap speedwell
Veronica serpyllifolia L. - thyme-leaved speedwell
Agrostis stolonifera L. - creeping tickle grass
Aristida oligantha Michx. - plains three-awn grass
Avena fatua L. - wild oats
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 linearifolium (Scribn.) Gould - slender-leaved panic grass
Echinochloa muricata (P.Beauv.) Fernald - American barnyard grass
Elymus canadensis L. - Great Plains wild-rye
Elymus hystrix L. - glumeless wild-rye
Elymus hystrix var. hystrix - glumeless wild-rye
Festuca rubra L. - red fescue
Glyceria grandis S.Watson - reed manna grass
Hordeum jubatum L. - squirrel-tail grass
Hordeum vulgare L. - common barley
Panicum miliaceum L. - wild proso millet
Panicum virgatum L. - switch grass
Phalaris arundinacea L. - reed canary grass
Poa annua L. - speargrass
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 sylvestris A.Gray - woodland bluegrass
Setaria faberi R.A.W.Herrm. - nodding foxtail
Setaria verticillata (L.) P.Beauv. - hooked bristle grass
Zizania aquatica L. - southern wild rice
Collomia linearis Nutt. - narrow-leaved mountain trumpet
Polemonium reptans var. reptans - spreading Jacob's-ladder
Fagopyrum esculentum Moench - common buckwheat
Fallopia scandens (L.) Holub - climbing false buckwheat
Persicaria maculosa Gray - spotted lady's-thumb
Rumex britannica L. - British dock
Rumex crispus L. - yellow dock
Potamogeton amplifolius Tuck. - large-leaved pondweed
Potamogeton crispus L. - curly pondweed
Potamogeton friesii Rupr. - Fries's pondweed
Potamogeton illinoensis Morong - Illinois pondweed
Potamogeton natans L. - floating-leaf pondweed
Potamogeton nodosus Poir. - long-leaved pondweed
Lysimachia ciliata L. - fringed loosestrife
Lysimachia quadriflora Sims - smooth loosestrife
Trientalis borealis Raf. - American starflower
Adiantum pedatum L. - northern maidenhair fern
Actaea pachypoda Elliott - white baneberry
Anemone acutiloba (DC.) G.Lawson - sharp-lobed hepatica
Anemone americana (DC.) H.Hara - round-lobed hepatica
Anemone canadensis L. - meadow anemone
Anemone virginiana L. - tall thimbleweed
Aquilegia canadensis L. - wild columbine
Caltha palustris L. - yellow marsh-marigold
Clematis virginiana L. - virgin's-bower
Coptis trifolia (L.) Salisb. - three-leaved gold-thread
Enemion biternatum Raf. - false rue anemone
Ranunculus abortivus L. - small-flowered buttercup
Ranunculus acris L. - tall buttercup
Ranunculus flabellaris Raf. - yellow water crowfoot
Ranunculus hispidus Michx. - rough buttercup
Ranunculus pensylvanicus L.f. - Pennsylvania buttercup
Ranunculus repens L. - creeping buttercup
Ranunculus sceleratus L. - cursed crowfoot
Thalictrum dioicum L. - quicksilver-weed
Thalictrum revolutum DC. - waxy meadow-rue
Frangula alnus Mill. - glossy buckthorn
Rhamnus alnifolia L'Hér. - alder-leaf buckthorn
Rhamnus cathartica L. - European buckthorn
Agrimonia gryposepala Wallr. - tall hairy agrimony
Amelanchier laevis Wiegand - smooth serviceberry
Amelanchier sanguinea - round-leaved serviceberry
Comarum palustre L. - purple marshlocks
Crataegus chrysocarpa Ashe - round-leaved hawthorn
Crataegus dodgei Ashe - Dodge's hawthorn
Crataegus holmesiana Ashe - Holmes' hawthorn
Crataegus lumaria Ashe - roundleaf hawthorn
Crataegus macrosperma Ashe - eastern hawthorn
Crataegus margaretta Ashe - Margarett's hawthorn
Crataegus schuettei Ashe - royal hawthorn
Dasiphora fruticosa (L.) Rydb. - shrubby five-fingers
Geum aleppicum Jacq. - yellow avens
Geum canadense Jacq. - white avens
Geum rivale L. - water avens
Malus ioensis - prairie crabapple
Malus pumila Mill. - orchard apple
Potentilla norvegica L. - strawberry-weed
Potentilla recta L. - sulphur five-fingers
Potentilla simplex Michx. - old-field cinquefoil
Prunus serotina Ehrh. - wild black cherry
Prunus virginiana - chokecherry
Rosa blanda Aiton - smooth rose
Rosa carolina L. - pasture rose
Rubus flagellaris Willd. - rambling dewberry
Rubus occidentalis L. - black raspberry
Rubus pensilvanicus Poir. - Vicksburg blackberry
Rubus pubescens Raf. - dwarf red blackberry
Rubus setosus Bigelow - Wheeler's blackberry
Sorbus aucuparia L. - European mountain ash
Spiraea alba var. alba - white meadowsweet
Galium aparine L. - sticky-willy
Galium asprellum Michx. - rough bedstraw
Galium boreale L. - northern bedstraw
Galium lanceolatum Torr. - wild licorice
Galium tinctorium L. - stiff bedstraw
Galium triflorum Michx. - sweet-scented bedstraw
Mitchella repens L. - partridgeberry
Zanthoxylum americanum Mill. - northern prickly-ash
Populus alba L. - white poplar
Populus tremuloides Michx. - trembling aspen
Salix amygdaloides Andersson - peach-leaved willow
Salix bebbiana Sarg. - long-beaked willow
Salix discolor Muhl. - pussy willow
Salix interior Rowlee - sandbar willow
Salix nigra Marshall - black willow
Salix petiolaris Sm. - slender willow
Acer ginnala Maxim. - Amur maple
Acer negundo L. - box elder
Acer nigrum F.Michx. - black maple
Acer platanoides L. - Norway maple
Acer rubrum - red maple
Acer x freemanii E.Murray - Freeman's maple
Mitella diphylla L. - two-leaf miterwort
Mitella nuda L. - small bishop's-cap
Scrophularia lanceolata Pursh - lance-leaf figwort
Verbascum phlomoides L. - orange mullein
Verbascum thapsus L. - giant mullein
Smilax ecirrhata S.Watson - upright carrion-flower
Smilax illinoensis Mangaly - Illinois greenbrier
Smilax lasioneura Hook. - hairy carrion-flower
Smilax tamnoides L. - hellfetter
Solanum dulcamara L. - deadly nightshade
Solanum ptychanthum Dunal - eastern black nightshade
Solanum rostratum Dunal - buffalo-bur nightshade
Taxus canadensis Marshall - ground-hemlock
Dirca palustris L. - rope-bark
Sparganium emersum Rehmann - narrow-leaved bur-reed
Sparganium eurycarpum Engelm. - broad-fruit bur-reed
Typha angustifolia L. - narrow-leaved cat-tail
Typha latifolia L. - common cat-tail
Ulmus americana L. - white elm
Ulmus rubra Muhl. - slippery elm
Boehmeria cylindrica (L.) Sw. - small-spike false nettle
Laportea canadensis (L.) Wedd. - Canadian wood-nettle
Pilea fontana (Lunell) Rydb. - lesser clearweed
Pilea pumila (L.) A.Gray - Canadian clearweed
Verbena hastata L. - swamp verbena
Verbena stricta Vent. - hoary vervain
Verbena urticifolia L. - white vervain
Viola nephrophylla Greene - northern bog violet
Viola sagittata Aiton - arrow-leaved violet
Viola sororia Willd. - hairy wood violet
Vitis riparia Michx. - river bank grape