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Families: 99
Genera: 356
Species: 673 (species rank)
Total Taxa: 708 (including subsp. and var.)

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Elymus canadensis L. - Great Plains wild-rye
Elymus curvatus Piper - awnless wild-rye
Elymus hystrix var. hystrix - glumeless wild-rye
Elymus wiegandii Fernald - Wiegand's wild-rye
Glyceria grandis S.Watson - reed manna grass
Hordeum jubatum L. - squirrel-tail grass
Panicum virgatum L. - switch grass
Paspalum setaceum Michx. - thin paspalum
Poa annua L. - speargrass
Poa compressa L. - wiregrass
Poa palustris L. - marsh bluegrass
Poa pratensis L. - Kentucky bluegrass
Sorghastrum nutans (L.) Nash - yellow Indian grass
Sporobolus neglectus Nash - small drop-seed
Collomia linearis Nutt. - narrow-leaved mountain trumpet
Phlox paniculata L. - summer phlox
Phlox subulata L. - moss-pink
Polemonium reptans var. reptans - spreading Jacob's-ladder
Fallopia scandens (L.) Holub - climbing false buckwheat
Persicaria maculosa Gray - spotted lady's-thumb
Polygonum ramosissimum - bushy knotweed
Rumex acetosella L. - sheep sorrel
Rumex crispus L. - yellow dock
Rumex fueginus Phil. - Tierra del Fuego dock
Potamogeton crispus L. - curly pondweed
Potamogeton nodosus Poir. - long-leaved pondweed
Potamogeton strictifolius A.Benn. - straight-leaved pondweed
Potamogeton zosteriformis Fernald - flat-stemmed pondweed
Lysimachia ciliata L. - fringed loosestrife
Lysimachia hybrida Michx. - river loosestrife
Lysimachia nummularia L. - creeping jenny
Adiantum pedatum L. - northern maidenhair fern
Cheilanthes feei T.Moore - slender lip fern
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. - marsh-marigold
Clematis virginiana L. - virgin's-bower
Enemion biternatum Raf. - false rue anemone
Ranunculus acris L. - tall buttercup
Ranunculus hispidus Michx. - rough buttercup
Thalictrum dioicum L. - quicksilver-weed
Rhamnus cathartica L. - European buckthorn
Agrimonia striata Michx. - roadside agrimony
Crataegus holmesiana Ashe - Holmes' hawthorn
Crataegus macrosperma Ashe - eastern hawthorn
Drymocallis arguta (Pursh) Rydb. - prairie cinquefoil tall cinquefoil tall potentilla
Geum canadense Jacq. - white avens
Malus ioensis - prairie crabapple
Potentilla argentea L. - silvery five-fingers
Potentilla norvegica L. - strawberry-weed
Potentilla recta L. - sulphur five-fingers
Potentilla simplex Michx. - old-field cinquefoil
Rosa arkansana Porter - wild prairie rose
Rosa blanda Aiton - meadow roae
Rubus pensilvanicus Poir. - Vicksburg blackberry
Galium aparine L. - sticky-willy
Galium asprellum Michx. - rough bedstraw
Galium boreale L. - northern bedstraw
Galium tinctorium L. - stiff bedstraw
Galium trifidum L. - small bedstraw
Galium triflorum Michx. - sweet-scented bedstraw
Houstonia longifolia Gaertn. - long-leaved bluets
Zanthoxylum americanum Mill. - northern prickly-ash
Populus alba L. - white poplar
Populus deltoides - eastern cottonwood
Populus grandidentata Michx. - large-toothed aspen
Populus tremuloides Michx. - trembling aspen
Salix alba L. - white willow
Salix amygdaloides Andersson - peach-leaved willow
Salix discolor Muhl. - pussy willow
Salix humilis Marshall - upland willow
Salix interior Rowlee - sandbar willow
Salix nigra Marshall - black willow
Salix x fragilis L. - crack willow
Salix x rubens Schrank (pro sp.) - hybrid crack willow
Azolla cristata Kaulf. - floating-fern
Acer nigrum F.Michx. - black maple
Acer saccharinum L. - soft maple
Heuchera richardsonii R.Br. - Richardson's alumroot
Mitella diphylla L. - two-leaf miterwort
Scrophularia lanceolata Pursh - lance-leaf figwort
Verbascum thapsus L. - giant mullein
Smilax ecirrhata S.Watson - upright carrion-flower
Smilax illinoensis Mangaly - Illinois greenbrier
Smilax lasioneura Hook. - hairy carrion-flower
Physalis heterophylla - clammy ground-cherry
Physalis longifolia - tall ground-cherry
Physalis virginiana Mill. - Virginia ground-cherry
Physalis virginiana var. virginiana - Virginia ground-cherry
Solanum dulcamara L. - deadly nightshade
Solanum ptychanthum Dunal - West Indian nightshade
Solanum rostratum Dunal - buffalo-bur nightshade
Staphylea trifolia L. - American bladdernut
Dirca palustris L. - rope-bark
Ulmus americana L. - white elm
Ulmus pumila L. - Siberian elm
Ulmus rubra Muhl. - slippery elm
Boehmeria cylindrica (L.) Sw. - small-spike false nettle
Laportea canadensis (L.) Wedd. - Canadian wood-nettle
Parietaria pensylvanica Muhl. ex Willd. - Pennsylvanian pellitory
Pilea pumila (L.) A.Gray - Canadian clearweed
Verbena bracteata Lag. & Rodr. - large-bracted vervain
Verbena hastata L. - swamp verbena
Verbena stricta Vent. - hoary vervain
Verbena urticifolia L. - white vervain
Viola nephrophylla Greene - northern bog violet
Viola pedata f. rosea Sanders - bird's-foot violet
Viola pedatifida G.Don - prairie violet
Viola sororia Willd. - hairy wood violet
Vitis riparia Michx. - river bank grape