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Families: 103
Genera: 292
Species: 489 (species rank)
Total Taxa: 492 (including subsp. and var.)
Alisma triviale Pursh - northern water-plantain
Amaranthus retroflexus L. - wild-beet amaranth
Froelichia floridana (Nutt.) Moq. - plains snake-cotton
Salsola tragus L. - tumbleweed
Rhus glabra L. - smooth sumac
Rhus typhina L. - staghorn sumac
Cicuta bulbifera L. - bulblet water-hemlock
Heracleum maximum W.Bartram - American cow-parsnip
Pastinaca sativa L. - wild parsnip
Sanicula canadensis L. - Canadian sanicle
Zizia aptera (A.Gray) Fernald - heart-leaved meadow-parsnip
Apocynum androsaemifolium L. - spreading dogbane
Asclepias exaltata L. - tall milkweed
Asclepias verticillata L. - whorled milkweed
Asclepias viridiflora Raf. - short green milkweed
Lemna minor L. - small duckweed
Lemna trisulca L. - star duckweed
Lemna turionifera Landolt - Turion duckweed
Aralia nudicaulis L. - wild sarsaparilla
Asarum canadense L. - wild-ginger
Asparagus officinalis L. - garden asparagus
Maianthemum canadense Desf. - wild lily-of-the-valley
Maianthemum stellatum (L.) Link - starry false Solomon's-seal
Ambrosia psilostachya DC. - western ragweed
Ambrosia trifida L. - horse-cane
Artemisia dracunculus L. - false tarragon
Artemisia frigida Willd. - prairie sage-wort
Bidens vulgata Greene - tall beggar-ticks
Cirsium muticum Michx. - swamp thistle
Coreopsis palmata Nutt. - stiff tickseed
Crepis capillaris (L.) Wallr. - smooth hawk's-beard
Crepis tectorum L. - narrow-leaved hawk's-beard
Erigeron annuus (L.) Pers. - eastern daisy fleabane
Euthamia graminifolia (L.) Nutt. - grass-leaved goldenrod
Eutrochium maculatum L. - spotted Joe-Pye-weed
Helianthus strumosus L. - rough-leaved sunflower
Helianthus tuberosus L. - woodland sunflower
Hieracium umbellatum L. - northern hawkweed
Lactuca canadensis L. - wild lettuce
Liatris aspera Michx. - rough gayfeather
Liatris cylindracea Michx. - barellhead gayfeather
Prenanthes alba L. - white rattlesnakeroot
Ratibida pinnata (Vent.) Barnhart - pinnate prairie coneflower
Solidago gigantea Aiton - smooth goldenrod
Solidago missouriensis Nutt. - Missouri goldenrod
Solidago rigida L. - stiff goldenrod
Solidago sciaphila E.S.Steele - shadowy goldenrod
Tragopogon dubius Scop. - yellow salsify
Vernonia fasciculata Michx. - smooth ironweed
Xanthium strumarium L. - rough cocklebur
Impatiens capensis Meerb. - spotted touch-me-not
Impatiens pallida Nutt. - yellow touch-me-not
Podophyllum peltatum L. - wild mandrake
Betula nigra L. - river birch
Corylus americana Walter - American hazelnut
Hydrophyllum virginianum L. - Virginia waterleaf
Lithospermum incisum Lehm. - narrow-leaved puccoon
Cardamine pensylvanica Muhl. ex Willd. - Pennsylvania bitter-cress
Draba reptans (Lam.) Fernald - common whitlow-grass
Erysimum cheiranthoides L. - worm-seed wallflower
Sisymbrium altissimum L. - tall tumble mustard
Thlaspi arvense L. - field pennycress
Opuntia fragilis (Nutt.) Haw. - little prickly-pear
Opuntia macrorhiza Engelm. - twist-spine prickly-pear
Campanula rapunculoides L. - rover bellflower
Cannabis sativa L. - marijuana
Celtis occidentalis L. - northern hackberry
Diervilla lonicera Mill. - northern bush-honeysuckle
Lonicera morrowii A.Gray - Morrow's honeysuckle
Cerastium arvense L. - field mouse-ear chickweed
Silene csereii Baumg. - glaucous campion
Silene latifolia Poir. - white cockle
Celastrus scandens L. - climbing bittersweet
Uvularia grandiflora Sm. - large-flowered bellwort
Commelina communis L. - common dayflower
Tradescantia ohiensis Raf. - smooth spiderwort
Calystegia sepium (L.) R.Br. - hedge false bindweed
Cornus alternifolia L.f. - pagoda dogwood
Cornus rugosa Lam. - round-leaved dogwood
Cornus sericea L. - red osier dogwood
Sicyos angulatus L. - bur-cucumber
Carex brevior (Dewey) Mack. - plains oval sedge
Carex canescens L. - silvery sedge
Carex eburnea Boott - bristle-leaf sedge
Carex grayi J.Carey - Gray's sedge
Carex haydenii Dewey - long-scaled tussock sedge
Carex intumescens Rudge - swollen sedge
Carex laeviconica Dewey - smooth-cone sedge
Carex pellita Willd. - broad-leaved woolly sedge
Carex retrorsa Schwein. - retrorse sedge
Carex typhina Michx. - cat-tail sedge
Carex utriculata Boott - Northwest Territory sedge
Carex vesicaria L. - tufted lake sedge
Cyperus erythrorhizos Muhl. - red-rooted sedge
Cyperus schweinitzii Torr. - Schweinitz's flat sedge
Cyperus squarrosus L. - bearded flat sedge
Cyperus strigosus L. - straw-colored cyperus
Cyperus X mesochorus Geise - midland sand sedge
Eleocharis compressa var. compressa - flat-stemmed spike-rush
Scirpus pedicellatus Fernald - stalked wool-grass
Cystopteris bulbifera (L.) Bernh. - bulblet fragile fern
Cystopteris tenuis (Michx.) Desv. - upland brittle bladder fern
Onoclea sensibilis L. - sensitive fern
Equisetum laevigatum A.Braun - smooth scouring rush
Euphorbia corollata L. - flowering spurge
Euphorbia cyparissias L. - graveyard spurge
Euphorbia davidii Subils - David's spurge
Euphorbia geyeri Engelm. - Geyer's spurge
Euphorbia glyptosperma Engelm. - ridge-seeded spurge
Euphorbia nutans Lag. - nodding spurge
Amorpha fruticosa L. - indigo-bush
Baptisia lactea (Raf.) Thieret - white wild indigo
Baptisia leucophaea Nutt. - plains wild indigo
Dalea candida var. candida - white prairie-clover
Dalea purpurea var. purpurea - violet prairie-clover
Dalea villosa var. villosa - silky prairie-clover
Lespedeza capitata Michx. - round-headed lespedeza
Melilotus officinalis (L.) Lam. - yellow sweet-clover
Tephrosia virginiana (L.) Pers. - Virginia tephrosia
Trifolium arvense L. - rabbit-foot clover
Trifolium campestre Schreb. - pinnate hop clover
Trifolium hybridum L. - alsike clover
Vicia villosa Roth - winter vetch
Quercus alba L. - white oak
Quercus bicolor Willd. - swamp white oak
Quercus rubra L. - northern red oak
Geranium maculatum L. - wild geranium
Ribes missouriense Nutt. - wild gooseberry
Elodea canadensis Michx. - common waterweed
Hypericum ascyron L. - great St. John's-wort
Triadenum fraseri (Spach) Gleason - Fraser's marsh St. John's-wort
Hypoxis hirsuta (L.) Coville - yellow star-grass
Iris versicolor L. - northern blue flag
Sisyrinchium campestre E.P.Bicknell - prairie blue-eyed-grass
Juglans nigra L. - black walnut
Hedeoma hispida Pursh - rough pennyroyal
Lycopus uniflorus Michx. - northern water-horehound
Linum sulcatum Riddell - grooved yellow flax
Lindernia dubia var. dubia - yellow-seed false pimpernel
Malva neglecta Wallr. - common mallow
Trillium flexipes Raf. - nodding wake-robin
Menispermum canadense L. - common moonseed
Mollugo verticillata L. - Indian chickweed
Morus alba L. - white mulberry
Nuphar variegata Durand - bull-head pond-lily
Circaea canadensis subsp. canadensis (L.) Hill - broad-leaf enchanter's-nightshade
Epilobium coloratum Biehler - eastern willow-herb
Oenothera parviflora L. - small-flowered evening-primrose
Oenothera serrulata Nutt. - yellow sundrops
Sceptridium dissectum (Spreng.) Lyon - lace-frond grape fern
Goodyera pubescens (Willd.) R.Br. - downy rattlesnake-plantain
Platanthera psycodes (L.) Lindl. - lesser purple fringed orchid
Agalinis tenuifolia (Vahl) Raf. - common false foxglove
Castilleja sessiliflora Pursh - downy painted-cup
Osmunda claytoniana L. - interrupted fern
Oxalis stricta L. - tall wood-sorrel
Corydalis micrantha subsp. micrantha - small-flowered corydalis
Dicentra cucullaria (L.) Bernh. - Dutchman's-breeches
Chelone glabra L. - white turtlehead
Gratiola neglecta Torr. - clammy hedge-hyssop
Penstemon grandiflorus Nutt. - large-flowered beard-tongue
Plantago patagonica Jacq. - woolly plantain
Veronica peregrina L. - purslane speedwell
Aristida basiramea Engelm. ex Vasey - fork-tip three-awn grass
Bromus inermis Leyss. - smooth brome
Bromus kalmii A.Gray - prairie brome
Digitaria cognata - fall witch grass
Elymus canadensis L. - Great Plains wild-rye
Panicum virgatum L. - switch grass
Phalaris arundinacea L. - reed canary grass
Setaria faberi R.A.W.Herrm. - nodding foxtail
Fallopia scandens (L.) Holub - climbing false buckwheat
Polygonum ramosissimum - bushy knotweed
Polygonum tenue Michx. - slender knotweed
Rumex fueginus Phil. - Tierra del Fuego dock
Rumex patientia L. - patience 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
Zannichellia palustris L. - horned-pondweed
Androsace occidentalis Pursh - western rock jasmine
Lysimachia ciliata L. - fringed loosestrife
Adiantum pedatum L. - northern maidenhair fern
Cheilanthes feei T.Moore - slender lip fern
Anemone acutiloba (DC.) G.Lawson - sharp-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
Ranunculus abortivus L. - small-flowered buttercup
Ranunculus hispidus Michx. - rough buttercup
Thalictrum dioicum L. - quicksilver-weed
Thalictrum revolutum DC. - waxy meadow-rue
Ceanothus herbaceus Raf. - prairie red-root
Agrimonia gryposepala Wallr. - tall hairy agrimony
Agrimonia striata Michx. - roadside agrimony
Drymocallis arguta (Pursh) Rydb. - prairie cinquefoil tall cinquefoil tall potentilla
Geum canadense Jacq. - white avens
Potentilla recta L. - sulphur five-fingers
Potentilla simplex Michx. - old-field cinquefoil
Prunus pumila L. - sand cherry
Rosa arkansana Porter - wild prairie rose
Rosa blanda Aiton - meadow roae
Sorbus americana Marshall - American mountain ash
Spiraea alba var. alba - white meadowsweet
Galium aparine L. - sticky-willy
Galium boreale L. - northern bedstraw
Galium triflorum Michx. - sweet-scented bedstraw
Houstonia longifolia Gaertn. - long-leaved bluets
Zanthoxylum americanum Mill. - northern prickly-ash
Populus grandidentata Michx. - large-toothed aspen
Populus tremuloides Michx. - trembling aspen
Salix discolor Muhl. - pussy willow
Salix humilis Marshall - upland willow
Salix interior Rowlee - sandbar willow
Azolla cristata Kaulf. - floating-fern
Acer negundo L. - box elder
Acer saccharinum L. - soft maple
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 lasioneura Hook. - hairy carrion-flower
Smilax tamnoides L. - hellfetter
Physalis virginiana var. virginiana - Virginia ground-cherry
Solanum ptychanthum Dunal - West Indian nightshade
Staphylea trifolia L. - American bladdernut
Sparganium emersum Rehmann - narrow-leaved bur-reed
Typha latifolia L. - common cat-tail
Ulmus americana L. - white elm
Ulmus rubra Muhl. - slippery elm
Boehmeria cylindrica (L.) Sw. - small-spike false nettle
Parietaria pensylvanica Muhl. ex Willd. - Pennsylvanian pellitory
Phyla lanceolata (Michx.) Greene - lance-leaf fog-fruit
Verbena stricta Vent. - hoary vervain
Viola pedata f. rosea Sanders - bird's-foot violet
Vitis riparia Michx. - river bank grape