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Families: 115
Genera: 413
Species: 932 (species rank)
Total Taxa: 1003 (including subsp. and var.)

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Ribes americanum Mill. - wild black currant
Ribes cynosbati L. - prickly wild gooseberry
Ribes hirtellum Michx. - swamp gooseberry
Ribes missouriense Nutt. - wild gooseberry
Ribes rubrum L. - garden red currant
Ribes triste Pall. - wild red currant
Myriophyllum sibiricum Kom. - short-spike water-milfoil
Myriophyllum spicatum L. - spike water-milfoil
Myriophyllum tenellum Bigelow - slender water-milfoil
Myriophyllum verticillatum L. - whorled water-milfoil
Elodea canadensis Michx. - common waterweed
Hypericum ascyron L. - great St. John's-wort
Hypericum boreale (Britton) E.P.Bicknell - northern St. John's-wort
Hypericum kalmianum L. - Kalm's St. John's-wort
Hypericum majus (A.Gray) Britton - larger Canadian St. John's-wort
Hypericum perforatum L. - 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
Carya ovata var. ovata - shellbark hickory
Juglans cinerea L. - white walnut
Juncus alpinoarticulatus Chaix - northern green rush
Juncus bufonius L. - toad rush
Juncus canadensis J.Gay - Canadian rush
Juncus dudleyi Wiegand - Dudley's rush
Juncus effusus L. - soft rush
Juncus interior Wiegand - interior rush
Juncus nodosus L. - knotted rush
Juncus pelocarpus E.Mey. - brown-fruited rush
Juncus tenuis Willd. - roadside rush
Triglochin palustris L. - slender bog arrow-grass
Dracocephalum parviflorum Nutt. - American dragonhead
Hedeoma hispida Pursh - rough pennyroyal
Lycopus uniflorus Michx. - northern water-horehound
Scutellaria lateriflora L. - mad-dog skullcap
Utricularia cornuta Michx. - naked bladderwort
Utricularia geminiscapa Benj. - twin-stemmed bladderwort
Utricularia gibba L. - humped bladderwort
Utricularia intermedia Hayne - northern bladderwort
Utricularia minor L. - small bladderwort
Utricularia purpurea Walter - spotted bladderwort
Utricularia vulgaris L. - great bladderwort
Lilium michiganense Farw. - Turk's-cap lily
Linum sulcatum Riddell - grooved yellow flax
Lycopodiella inundata (L.) Holub - northern bog club-moss
Lycopodium clavatum L. - staghorn club-moss
Lythrum salicaria L. - spiked loosestrife
Hibiscus trionum L. - flower-of-an-hour
Malva neglecta Wallr. - common mallow
Trillium cernuum L. - whip-poor-will flower
Rhexia virginica L. - wing-stem meadow-pitchers
Menyanthes trifoliata L. - common buckbean
Mollugo verticillata L. - Indian chickweed
Aletris farinosa L. - white stargrass
Nuphar variegata Durand - bull-head pond-lily
Syringa vulgaris L. - common lilac
Circaea alpina subsp. alpina - small enchanter's-nightshade
Epilobium coloratum Biehler - eastern willow-herb
Epilobium leptophyllum Raf. - fen willow-herb
Oenothera biennis L. - common evening-primrose
Oenothera laciniata subsp. laciniata - ragged evening-primrose
Oenothera parviflora L. - small-flowered evening-primrose
Oenothera perennis L. - small sundrops
Oenothera serrulata Nutt. - yellow sundrops
Oenothera villosa subsp. villosa - hairy evening-primrose
Ophioglossum pusillum Raf. - northern adder's-tongue
Sceptridium dissectum (Spreng.) Lyon - lace-frond grape fern
Goodyera pubescens (Willd.) R.Br. - downy rattlesnake-plantain
Liparis loeselii (L.) Rich. - Loesel's twayblade
Platanthera clavellata (Michx.) Luer - small green fringed orchid
Platanthera huronensis (Nutt.) Lindl. - tall nothern bog orchid
Platanthera lacera (Michx.) G.Don - ragged fringed orchid
Platanthera psycodes (L.) Lindl. - lesser purple fringed orchid
Spiranthes cernua (L.) Rich. - nodding lady's-tresses
Spiranthes romanzoffiana Cham. - hooded lady's-tresses
Agalinis paupercula (A.Gray) Britton - smooth false foxglove
Agalinis tenuifolia (Vahl) Raf. - common false foxglove
Aureolaria pedicularia (L.) Raf. - clammy 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
Argemone albiflora subsp. albiflora - blue-stem prickly poppy
Phryma leptostachya L. - American lop-seed
Pinus strobus L. - eastern white pine
Chelone glabra L. - white turtlehead
Gratiola neglecta Torr. - clammy hedge-hyssop
Linaria vulgaris Mill. - butter-and-eggs
Penstemon digitalis Nutt. ex Sims - tall white beard-tongue
Penstemon gracilis Nutt. - slender beard-tongue
Penstemon grandiflorus Nutt. - large-flowered beard-tongue
Penstemon pallidus Small - pale beard-tongue
Plantago aristata Michx. - large-bracted plantain
Plantago patagonica Jacq. - woolly plantain
Plantago rugelii Decne. - Rugel's plantain
Veronica serpyllifolia L. - thyme-leaved speedwell
Veronica verna L. - spring speedwell
Alopecurus aequalis Sobol. - short-awned foxtail
Aristida basiramea Engelm. ex Vasey - fork-tip three-awn grass
Aristida oligantha Michx. - plains three-awn grass
Aristida tuberculosa Nutt. - seaside three-awn
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
Calamagrostis stricta (Timm) Koeler - slim-stem small reed grass
Cinna arundinacea L. - stout wood-reed
Dactylis glomerata L. - orchard grass
Dichanthelium latifolium (L.) Harvill - broad-leaved panic grass
Dichanthelium linearifolium (Scribn.) Gould - slender-leaved panic grass
Dichanthelium perlongum (Nash) Freckmann - long-stalked panic grass
Digitaria cognata - fall witch grass
Elymus canadensis L. - Great Plains wild-rye
Elymus hystrix L. - glumeless wild-rye
Glyceria borealis (Nash) Batch. - boreal manna grass
Hordeum jubatum L. - squirrel-tail grass
Hordeum vulgare L. - common barley
Panicum miliaceum L. - wild proso millet
Phalaris arundinacea L. - reed canary grass
Poa compressa L. - wiregrass
Poa palustris L. - marsh bluegrass
Poa pratensis L. - Kentucky bluegrass
Puccinellia distans (Jacq.) Parl. - weeping alkali grass
Sorghastrum nutans (L.) Nash - yellow Indian grass
Phlox subulata L. - moss-pink
Polygala sanguinea L. - purple milkwort
Fagopyrum esculentum Moench - common buckwheat
Fallopia scandens (L.) Holub - climbing false buckwheat
Persicaria maculosa Gray - spotted lady's-thumb
Polygonum achoreum S.F.Blake - Blake's knotweed
Polygonum tenue Michx. - slender knotweed
Rumex acetosella L. - sheep sorrel
Rumex britannica L. - British dock
Rumex crispus L. - yellow dock
Rumex fueginus Phil. - Tierra del Fuego dock
Rumex obtusifolius L. - bitter dock
Pontederia cordata L. - pickerel-weed
Potamogeton amplifolius Tuck. - large-leaved pondweed
Potamogeton crispus L. - curly pondweed
Potamogeton friesii Rupr. - Fries's pondweed
Potamogeton gramineus L. - variable-leaved 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 strictifolius A.Benn. - straight-leaved pondweed
Potamogeton zosteriformis Fernald - flat-stemmed pondweed
Lysimachia ciliata L. - fringed loosestrife
Lysimachia lanceolata Walter - lance-leaved 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
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
Ranunculus abortivus L. - small-flowered buttercup
Ranunculus flabellaris Raf. - yellow water crowfoot
Ranunculus pensylvanicus L.f. - Pennsylvania buttercup
Thalictrum dioicum L. - quicksilver-weed
Ceanothus herbaceus Raf. - prairie red-root
Rhamnus alnifolia L'Hér. - alder-leaf buckthorn
Rhamnus cathartica L. - European buckthorn
Agrimonia gryposepala Wallr. - tall hairy agrimony
Amelanchier laevis Wiegand - smooth serviceberry
Comarum palustre L. - purple marshlocks
Crataegus chrysocarpa Ashe - round-leaved hawthorn
Crataegus macrosperma Ashe - eastern 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 pumila Mill. - orchard apple
Potentilla argentea L. - silvery five-fingers
Potentilla norvegica L. - strawberry-weed
Potentilla recta L. - sulphur five-fingers
Potentilla simplex Michx. - old-field cinquefoil
Prunus nigra Aiton - Canadian plum
Prunus pumila L. - sand cherry
Rosa arkansana Porter - wild prairie rose
Rosa blanda Aiton - meadow roae
Rosa carolina L. - pasture rose
Rubus flagellaris Willd. - rambling dewberry
Rubus hispidus L. - swamp dewberry
Rubus occidentalis L. - black raspberry
Rubus parviflorus Nutt. - western thimbleberry
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 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
Mitchella repens L. - partridgeberry
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 humilis Marshall - upland willow
Salix interior Rowlee - sandbar willow
Salix lucida Muhl. - shining willow
Salix myricoides Muhl. - blue-leaf willow
Salix nigra Marshall - black willow
Salix petiolaris Sm. - slender willow
Acer negundo L. - box elder
Acer platanoides L. - Norway maple
Acer rubrum L. - red 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
Scrophularia lanceolata Pursh - lance-leaf figwort
Verbascum thapsus L. - giant mullein
Selaginella eclipes W.R.Buck - northern meadow spike-moss
Smilax lasioneura Hook. - hairy carrion-flower
Physalis virginiana var. virginiana - Virginia ground-cherry
Solanum dulcamara L. - deadly nightshade
Solanum ptychanthum Dunal - West Indian nightshade
Solanum sarrachoides Sendtn. - hairy nightshade
Triantha glutinosa (Michx.) Baker - sticky false asphodel
Sparganium emersum Rehmann - narrow-leaved bur-reed
Typha angustifolia L. - narrow-leaved cat-tail
Typha latifolia L. - common cat-tail
Typha X glauca Godr. - white cat-tail
Ulmus americana L. - white elm
Ulmus pumila L. - Siberian elm
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
Verbena bracteata Lag. & Rodr. - prostrate vervain
Verbena hastata L. - swamp verbena
Verbena simplex Lehm. - narrow-leaved vervain
Verbena stricta Vent. - hoary vervain
Viola cucullata Aiton - marsh blue violet
Viola nephrophylla Greene - northern bog violet
Viola pedata L. - bird's-foot violet
Viola pedata f. rosea Sanders - bird's-foot violet
Viola sagittata var. sagittata - arrow-leaved violet
Viola sororia Willd. - hairy wood violet
Viola tricolor L. - pansy violet
Vitis riparia Michx. - river bank grape