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Families: 115
Genera: 436
Species: 926 (species rank)
Total Taxa: 990 (including subsp. and var.)

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Gentiana andrewsii var. andrewsii - prairie closed gentian
Gentianopsis crinita (Froel.) Ma - greater fringed gentian
Geranium maculatum L. - wild geranium
Ribes americanum Mill. - wild black currant
Ribes cynosbati L. - prickly wild gooseberry
Ribes missouriense Nutt. - wild gooseberry
Hamamelis virginiana L. - American witch-hazel
Elodea canadensis Michx. - common waterweed
Hypericum ascyron L. - great St. John's-wort
Hypericum perforatum L. - St. John's-wort
Hypericum punctatum Lam. - spotted St. John's-wort
Sisyrinchium sp. L. - Blue-Eyed-Grass
Sisyrinchium campestre E.P.Bicknell - prairie blue-eyed-grass
Carya ovata var. ovata - shellbark hickory
Juglans cinerea L. - white walnut
Juglans nigra L. - black walnut
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
Hedeoma hispida Pursh - rough pennyroyal
Hedeoma pulegioides (L.) Pers. - American pennyroyal
Lycopus uniflorus Michx. - northern water-horehound
Lycopus virginicus L. - Virginia water-horehound
Scutellaria lateriflora L. - mad-dog skullcap
Scutellaria ovata subsp. ovata - heart-leaved skullcap
Stachys arenicola Britton - marsh hedge-nettle
Erythronium albidum Nutt. - white trout-lily
Lilium michiganense Farw. - Turk's-cap lily
Linum sulcatum Riddell - grooved yellow flax
Lindernia dubia (L.) Pennell - moist bank pimpernel
Diphasiastrum complanatum (L.) Holub - northern running-pine
Lycopodium clavatum L. - staghorn club-moss
Lythrum salicaria L. - spiked loosestrife
Malva neglecta Wallr. - common mallow
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
Nelumbo lutea Willd. - water-chinquapin
Nuphar variegata Durand - bull-head pond-lily
Circaea alpina subsp. alpina - small 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 parviflora L. - small-flowered evening-primrose
Oenothera perennis L. - small sundrops
Goodyera pubescens (Willd.) R.Br. - downy rattlesnake-plantain
Liparis loeselii (L.) Rich. - Loesel's twayblade
Malaxis unifolia Michx. - green adder's-mouth
Platanthera psycodes (L.) Lindl. - lesser purple fringed orchid
Agalinis gattingeri (Small) Small - round-stemmed false foxglove
Agalinis tenuifolia (Vahl) Raf. - common false foxglove
Castilleja coccinea (L.) Spreng. - scarlet painted-cup
Castilleja sessiliflora Pursh - downy painted-cup
Orobanche uniflora L. - one-flowered broom-rape
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
Chelone glabra L. - white turtlehead
Linaria vulgaris Mill. - butter-and-eggs
Penstemon pallidus Small - pale beard-tongue
Plantago aristata Michx. - large-bracted plantain
Plantago rugelii Decne. - Rugel's plantain
Veronica arvensis L. - corn speedwell
Veronica serpyllifolia L. - thyme-leaved speedwell
Agrostis stolonifera L. - creeping tickle grass
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
Dichanthelium latifolium (L.) Harvill - broad-leaved panic grass
Digitaria cognata - fall witch grass
Elymus canadensis L. - Great Plains 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
Glyceria grandis S.Watson - reed manna grass
Hordeum jubatum L. - squirrel-tail grass
Milium effusum L. - wood millet
Panicum virgatum L. - switch grass
Paspalum setaceum Michx. - thin paspalum
Phalaris arundinacea L. - reed canary grass
Poa alsodes A.Gray - woodland bluegrass
Poa compressa L. - wiregrass
Poa palustris L. - marsh bluegrass
Poa pratensis L. - Kentucky bluegrass
Poa sylvestris A.Gray - woodland bluegrass
Poa trivialis L. - rough bluegrass
Setaria faberi R.A.W.Herrm. - nodding foxtail
Sorghastrum nutans (L.) Nash - yellow Indian grass
Polemonium reptans var. reptans - spreading Jacob's-ladder
Polygala sanguinea L. - purple milkwort
Polygala senega L. - senega root
Fagopyrum esculentum Moench - common buckwheat
Fallopia cilinodis (Michx.) Holub - fringed black bindweed
Fallopia scandens (L.) Holub - climbing false buckwheat
Persicaria maculosa Gray - spotted lady's-thumb
Polygonum achoreum S.F.Blake - Blake's knotweed
Polygonum erectum L. - erect knotweed
Polygonum ramosissimum - bushy knotweed
Rumex acetosella L. - sheep sorrel
Rumex britannica L. - British dock
Rumex crispus L. - yellow dock
Rumex obtusifolius L. - bitter dock
Pontederia cordata L. - pickerel-weed
Potamogeton crispus L. - curly pondweed
Potamogeton nodosus Poir. - long-leaved pondweed
Potamogeton pusillus L. - small pondweed
Potamogeton zosteriformis Fernald - flat-stemmed pondweed
Lysimachia ciliata L. - fringed loosestrife
Lysimachia nummularia L. - creeping jenny
Lysimachia quadrifolia L. - whorled yellow loosestrife
Primula fassettii A.R.Mast & Reveal - jeweled shooting-star
Primula mistassinica Michx. - Lake Mistassini primrose
Trientalis borealis Raf. - American starflower
Adiantum pedatum L. - northern maidenhair fern
Cheilanthes feei T.Moore - slender lip fern
Pellaea atropurpurea (L.) Link - purple-stem cliff brake
Aconitum napellus L. - Venus'-chariot
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
Enemion biternatum Raf. - false rue anemone
Ranunculus abortivus L. - small-flowered buttercup
Ranunculus hispidus Michx. - rough buttercup
Ranunculus pensylvanicus L.f. - Pennsylvania buttercup
Thalictrum dioicum L. - quicksilver-weed
Ceanothus herbaceus Raf. - prairie red-root
Rhamnus alnifolia L'Hér. - alder-leaf buckthorn
Agrimonia gryposepala Wallr. - tall hairy agrimony
Amelanchier interior Nielsen - Wiegand's shadbush
Amelanchier laevis Wiegand - smooth serviceberry
Amelanchier sanguinea - round-leaved serviceberry
Crataegus chrysocarpa Ashe - round-leaved hawthorn
Crataegus macrosperma Ashe - eastern hawthorn
Drymocallis arguta (Pursh) Rydb. - prairie cinquefoil tall cinquefoil tall potentilla
Filipendula rubra (Hill) B.L.Rob. - queen-of-the-prairie
Geum aleppicum Jacq. - yellow avens
Geum canadense Jacq. - white avens
Malus ioensis - prairie crabapple
Malus pumila Mill. - orchard apple
Potentilla argentea L. - silvery five-fingers
Potentilla norvegica L. - Norwegian cinquefoil
Potentilla recta L. - sulphur five-fingers
Potentilla simplex Michx. - old-field cinquefoil
Prunus nigra Aiton - Canadian plum
Rosa arkansana Porter - wild prairie rose
Rosa blanda Aiton - meadow roae
Rosa carolina L. - pasture rose
Rubus canadensis L. - smooth highbush blackberry
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
Galium aparine L. - sticky-willy
Galium asprellum Michx. - rough bedstraw
Galium boreale L. - northern bedstraw
Galium lanceolatum Torr. - wild licorice
Galium triflorum Michx. - sweet-scented bedstraw
Houstonia longifolia Gaertn. - long-leaved bluets
Mitchella repens L. - partridgeberry
Zanthoxylum americanum Mill. - northern prickly-ash
Populus alba L. - white poplar
Populus grandidentata Michx. - large-toothed aspen
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 lucida Muhl. - shining willow
Salix nigra Marshall - black willow
Salix petiolaris Sm. - slender willow
Salix x fragilis L. - crack willow
Azolla cristata Kaulf. - floating-fern
Azolla filiculoides Lam. - Pacific mosquitofern
Acer negundo L. - box elder
Acer nigrum F.Michx. - black maple
Acer platanoides L. - Norway maple
Acer saccharinum L. - soft maple
Acer spicatum Lam. - mountain maple
Acer x freemanii E.Murray - Freeman's maple
Heuchera richardsonii R.Br. - Richardson's alumroot
Mitella diphylla L. - two-leaf miterwort
Scrophularia lanceolata Pursh - lance-leaf figwort
Verbascum blattaria L. - moth 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
Physalis virginiana var. virginiana - Virginia ground-cherry
Solanum dulcamara L. - deadly nightshade
Solanum ptychanthum Dunal - West Indian nightshade
Staphylea trifolia L. - American bladdernut
Taxus canadensis Marshall - ground-hemlock
Dirca palustris L. - rope-bark
Typha latifolia L. - common cat-tail
Typha X glauca Godr. - white cat-tail
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 fontana (Lunell) Rydb. - lesser clearweed
Pilea pumila (L.) A.Gray - Canadian clearweed
Phyla lanceolata (Michx.) Greene - lance-leaf fog-fruit
Verbena bracteata Lag. & Rodr. - prostrate vervain
Verbena hastata L. - swamp verbena
Verbena stricta Vent. - hoary vervain
Verbena urticifolia L. - white vervain
Verbena x engelmannii Moldenke - Engelmann's vervain
Viola affinis Leconte - sand violet
Viola nephrophylla Greene - northern bog violet
Viola pedata f. rosea Sanders - bird's-foot violet
Viola pedatifida G.Don - prairie violet
Viola pubescens Aiton - yellow violet
Viola sororia Willd. - hairy wood violet
Vitis riparia Michx. - river bank grape