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Families: 120
Genera: 446
Species: 977 (species rank)
Total Taxa: 1063 (including subsp. and var.)

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Vaccinium myrtilloides Michx. - velvet-leaf huckleberry
Vaccinium oxycoccos L. - small cranberry
Euphorbia corollata L. - flowering spurge
Euphorbia davidii Subils - David's spurge
Euphorbia glyptosperma Engelm. - ridge-seeded spurge
Euphorbia nutans Lag. - nodding spurge
Amorpha fruticosa L. - indigo-bush
Cercis canadensis - eastern redbud
Dalea candida var. candida - white prairie-clover
Dalea purpurea var. purpurea - violet prairie-clover
Desmodium canadense (L.) DC. - showy tick-trefoil
Desmodium illinoense A.Gray - prairie tick-trefoil
Lathyrus palustris L. - slender-stem pea-vine
Lespedeza capitata Michx. - round-headed lespedeza
Lotus corniculatus L. - bird's-foot trefoil
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
Tephrosia virginiana (L.) Pers. - Virginia tephrosia
Trifolium hybridum L. - alsike clover
Trifolium repens L. - white clover
Vicia americana - American vetch
Vicia villosa Roth - hairy 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
Gentianopsis virgata (Raf.) Holub - small fringed gentian
Geranium maculatum L. - wild geranium
Ribes americanum Mill. - wild black currant
Ribes cynosbati L. - prickly wild gooseberry
Ribes hirtellum Michx. - swamp gooseberry
Ribes lacustre (Pers.) Poir. - spiny swamp currant
Ribes missouriense Nutt. - wild gooseberry
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
Elodea canadensis Michx. - common waterweed
Najas marina L. - spiny naiad
Hypericum ascyron L. - great St. John's-wort
Hypericum majus (A.Gray) Britton - larger Canadian St. John's-wort
Hypericum perforatum L. - St. John's-wort
Hypericum punctatum Lam. - spotted St. John's-wort
Triadenum fraseri (Spach) Gleason - Fraser's marsh St. John's-wort
Hypoxis hirsuta (L.) Coville - yellow star-grass
Iris pseudacorus L. - yellow water iris
Iris versicolor L. - northern blue flag
Sisyrinchium campestre E.P.Bicknell - prairie blue-eyed-grass
Carya ovata - shellbark hickory
Carya ovata var. ovata - shellbark hickory
Juglans nigra L. - black walnut
Juncus canadensis J.Gay - Canadian rush
Juncus dudleyi Wiegand - Dudley's rush
Juncus tenuis Willd. - roadside rush
Juncus torreyi Coville - Torrey's rush
Triglochin maritima L. - seaside arrow-grass
Agastache nepetoides (L.) Kuntze - yellow giant hyssop
Ajuga genevensis L. - standing bugle
Ballota nigra L. - black horehound
Lycopus uniflorus Michx. - northern water-horehound
Scutellaria lateriflora L. - mad-dog skullcap
Scutellaria ovata subsp. ovata - heart-leaved skullcap
Utricularia sp. - Bladderwort
Utricularia gibba L. - humped bladderwort
Utricularia intermedia Hayne - northern bladderwort
Utricularia vulgaris L. - great bladderwort
Erythronium albidum Nutt. - white trout-lily
Lilium michiganense Farw. - Turk's-cap lily
Linum sulcatum Riddell - grooved yellow flax
Lythrum salicaria L. - spiked loosestrife
Hibiscus trionum L. - flower-of-an-hour
Malva neglecta Wallr. - common mallow
Trillium cernuum L. - whip-poor-will flower
Trillium flexipes Raf. - nodding wake-robin
Menispermum canadense L. - common moonseed
Menyanthes trifoliata L. - common buckbean
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
Nymphaea odorata Aiton - fragrant water-lily
Circaea canadensis subsp. canadensis (L.) Hill - broad-leaf enchanter's-nightshade
Epilobium coloratum Biehler - eastern willow-herb
Epilobium leptophyllum Raf. - fen willow-herb
Epilobium strictum Muhl. ex Spreng. - northeastern willow-herb
Oenothera biennis L. - common evening-primrose
Oenothera parviflora L. - small-flowered evening-primrose
Oenothera serrulata Nutt. - yellow 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 lacera (Michx.) G.Don - ragged fringed orchid
Spiranthes cernua (L.) Rich. - nodding lady's-tresses
Spiranthes magnicamporum Sheviak - Great Plains lady's-tresses
Agalinis tenuifolia (Vahl) Raf. - common false foxglove
Aureolaria grandiflora var. pulchra Pennell - large-flowered yellow false foxglove
Castilleja coccinea (L.) Spreng. - scarlet painted-cup
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
Dicentra cucullaria (L.) Bernh. - Dutchman's-breeches
Penthorum sedoides L. - ditch stonecrop
Mimulus ringens - monkey-flower
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 peregrina L. - purslane speedwell
Veronica serpyllifolia L. - thyme-leaved speedwell
Agrostis stolonifera L. - creeping tickle grass
Alopecurus aequalis Sobol. - short-awned foxtail
Bromus arvensis L. - fringed brome
Bromus ciliatus L. - fringed brome
Bromus inermis Leyss. - smooth brome
Bromus kalmii A.Gray - prairie brome
Bromus tectorum L. - June grass
Cinna arundinacea L. - stout wood-reed
Dactylis glomerata L. - orchard grass
Digitaria cognata - fall witch grass
Elymus canadensis L. - Great Plains wild-rye
Eragrostis minor Host - little love grass
Festuca rubra L. - red fescue
Glyceria borealis (Nash) Batch. - boreal manna grass
Glyceria septentrionalis Hitchc. - northern manna grass
Hordeum jubatum L. - squirrel-tail grass
Panicum virgatum L. - switch grass
Phalaris arundinacea L. - reed canary grass
Phalaris canariensis L. - common canary grass
Poa annua L. - speargrass
Poa compressa L. - wiregrass
Poa nemoralis L. - wood bluegrass
Poa palustris L. - marsh bluegrass
Poa pratensis L. - Kentucky bluegrass
Poa trivialis L. - rough bluegrass
Puccinellia distans (Jacq.) Parl. - weeping alkali grass
Setaria faberi R.A.W.Herrm. - nodding foxtail
Sorghastrum nutans (L.) Nash - yellow Indian grass
Sporobolus neglectus Nash - small drop-seed
Zizania aquatica L. - southern wild rice
Collomia linearis Nutt. - narrow-leaved mountain trumpet
Phlox paniculata L. - summer phlox
Polemonium reptans var. reptans - spreading Jacob's-ladder
Polygala sanguinea L. - purple milkwort
Fallopia scandens (L.) Holub - climbing false buckwheat
Persicaria longiseta (Bruyn) Kitag. - Oriental lady's-thumb
Persicaria maculosa Gray - spotted lady's-thumb
Polygonum achoreum S.F.Blake - Blake's knotweed
Rumex acetosella L. - sheep sorrel
Rumex britannica L. - British dock
Rumex crispus L. - yellow dock
Pontederia cordata L. - pickerel-weed
Potamogeton amplifolius Tuck. - large-leaved pondweed
Potamogeton crispus L. - curly pondweed
Potamogeton epihydrus Raf. - ribbon-leaved pondweed
Potamogeton friesii Rupr. - Fries's pondweed
Potamogeton illinoensis Morong - Illinois pondweed
Potamogeton natans L. - floating-leaf pondweed
Potamogeton nodosus Poir. - long-leaved pondweed
Potamogeton praelongus Wulfen - white-stemmed pondweed
Potamogeton robbinsii Oakes - Robbins' pondweed
Potamogeton zosteriformis Fernald - flat-stemmed pondweed
Zannichellia palustris L. - horned-pondweed
Androsace occidentalis Pursh - western rock jasmine
Lysimachia ciliata L. - fringed loosestrife
Lysimachia nummularia L. - creeping jenny
Lysimachia quadriflora Sims - smooth loosestrife
Lysimachia quadrifolia L. - whorled yellow loosestrife
Lysimachia thyrsiflora L. - tufted loosestrife
Trientalis borealis Raf. - American starflower
Adiantum pedatum L. - northern maidenhair fern
Actaea pachypoda Elliott - white baneberry
Anemone americana (DC.) H.Hara - round-lobed hepatica
Anemone canadensis L. - meadow anemone
Anemone patens - prairie-smoke
Aquilegia canadensis L. - wild columbine
Caltha palustris L. - yellow marsh-marigold
Enemion biternatum Raf. - false rue anemone
Ranunculus abortivus L. - small-flowered buttercup
Ranunculus acris L. - tall buttercup
Ranunculus flabellaris Raf. - yellow water crowfoot
Ranunculus pensylvanicus L.f. - Pennsylvania buttercup
Thalictrum dioicum L. - quicksilver-weed
Frangula alnus Mill. - glossy buckthorn
Rhamnus alnifolia L'Hér. - alder-leaf buckthorn
Rhamnus cathartica L. - European buckthorn
Agrimonia gryposepala Wallr. - tall hairy agrimony
Amelanchier bartramiana (Tausch) M.Roem. - oblong-fruit serviceberry
Amelanchier interior Nielsen - Wiegand's shadbush
Amelanchier laevis Wiegand - smooth serviceberry
Comarum palustre L. - purple marshlocks
Crataegus scabrida Sarg. - rough hawthorn
Dasiphora fruticosa (L.) Rydb. - shrubby five-fingers
Drymocallis arguta (Pursh) Rydb. - prairie cinquefoil tall cinquefoil tall potentilla
Geum aleppicum Jacq. - yellow avens
Geum canadense Jacq. - white 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 nigra Aiton - Canadian plum
Rosa blanda Aiton - meadow roae
Rosa carolina L. - pasture rose
Rubus occidentalis L. - black raspberry
Rubus pensilvanicus Poir. - Vicksburg blackberry
Rubus pubescens Raf. - dwarf red blackberry
Spiraea alba var. alba - white meadowsweet
Galium aparine L. - sticky-willy
Galium boreale L. - northern bedstraw
Galium tinctorium L. - stiff bedstraw
Galium triflorum Michx. - sweet-scented bedstraw
Zanthoxylum americanum Mill. - northern prickly-ash
Populus alba L. - white poplar
Populus grandidentata Michx. - large-toothed aspen
Populus tremuloides Michx. - trembling aspen
Salix alba L. - white willow
Salix amygdaloides Andersson - peach-leaved willow
Salix bebbiana Sarg. - long-beaked willow
Salix discolor Muhl. - pussy willow
Salix humilis Marshall - upland willow
Salix interior Rowlee - sandbar willow
Salix myricoides Muhl. - blue-leaf willow
Salix nigra Marshall - black willow
Salix petiolaris Sm. - slender willow
Salix x fragilis L. - crack willow
Salix x rubens Schrank (pro sp.) - hybrid crack willow
Acer negundo L. - box elder