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Families: 137
Genera: 637
Species: 1637 (species rank)
Total Taxa: 1854 (including subsp. and var.)

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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 longifolius DC. - long-leaved dock
Rumex obtusifolius L. - bitter dock
Rumex patientia L. - patience dock
Rumex venosus Pursh - wild begonia
Pontederia cordata L. - pickerel-weed
Portulaca oleracea L. - little hogweed
Potamogeton amplifolius Tuck. - large-leaved pondweed
Potamogeton crispus L. - curly pondweed
Potamogeton epihydrus Raf. - ribbon-leaved pondweed
Potamogeton foliosus - leafy 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 pusillus L. - small pondweed
Potamogeton strictifolius A.Benn. - straight-leaved pondweed
Potamogeton zosteriformis Fernald - flat-stemmed pondweed
Zannichellia palustris L. - horned-pondweed
Androsace occidentalis Pursh - western rock jasmine
Lysimachia ciliata L. - fringed loosestrife
Lysimachia clethroides Duby - white loosestrife
Lysimachia hybrida Michx. - river 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
Lysimachia vulgaris L. - garden yellow loosestrife
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 patens - prairie-smoke
Anemone virginiana L. - tall thimbleweed
Aquilegia canadensis L. - wild columbine
Caltha palustris L. - yellow marsh-marigold
Clematis occidentalis var. occidentalis - western blue virgin's-bower
Clematis virginiana L. - virgin's-bower
Consolida ajacis (L.) Schur - doubtful knight's spur
Enemion biternatum Raf. - false rue anemone
Myosurus minimus L. - tiny mouse's-tail
Ranunculus abortivus L. - small-flowered buttercup
Ranunculus acris L. - tall buttercup
Ranunculus ficaria L. - lesser celandine
Ranunculus flabellaris Raf. - yellow water crowfoot
Ranunculus hispidus Michx. - rough buttercup
Ranunculus pensylvanicus L.f. - Pennsylvania buttercup
Ranunculus repens L. - creeping buttercup
Ranunculus testiculatus Crantz - curve-seed butterwort
Thalictrum dioicum L. - quicksilver-weed
Reseda lutea L. - yellow mignonette
Ceanothus herbaceus Raf. - prairie red-root
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
Amelanchier sanguinea - round-leaved serviceberry
Comarum palustre L. - purple marshlocks
Crataegus chrysocarpa Ashe - round-leaved hawthorn
Crataegus fluviatilis Sarg. - Fort Sheridan hawthorn
Crataegus holmesiana Ashe - Holmes' hawthorn
Crataegus macrosperma Ashe - eastern hawthorn
Crataegus scabrida Sarg. - rough hawthorn
Crataegus X lucorum Sarg. - grove hawthorn
Dasiphora fruticosa (L.) Rydb. - shrubby five-fingers
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
Geum triflorum - prairie-smoke
Geum urbanum L. - wood avens
Malus ioensis - prairie crabapple
Malus pumila Mill. - orchard apple
Potentilla argentea L. - silvery five-fingers
Potentilla intermedia L. - downy cinquefoil
Potentilla norvegica L. - strawberry-weed
Potentilla recta L. - sulphur five-fingers
Potentilla simplex Michx. - old-field cinquefoil
Prunus serotina Ehrh. - wild black cherry
Prunus tomentosa Thunb. - Manchu cherry
Prunus virginiana L. - chokecherry
Rosa arkansana Porter - wild prairie rose
Rosa blanda Aiton - meadow roae
Rosa canina L. - dog rose
Rosa carolina L. - pasture rose
Rosa rugosa Thunb. - rugose rose
Rosa setigera - Illinois rose
Rubus flagellaris Willd. - rambling dewberry
Rubus hispidus L. - swamp dewberry
Rubus occidentalis L. - black raspberry
Rubus pensilvanicus Poir. - Vicksburg blackberry
Rubus pubescens Raf. - dwarf red blackberry
Rubus setosus Bigelow - Wheeler's blackberry
Sorbus americana Marshall - American mountain ash
Sorbus aucuparia L. - European mountain ash
Spiraea alba var. alba - white meadowsweet
Spiraea X bumalda Burv. - Japanese spiraea
Galium album Mill. - wild madder
Galium aparine L. - sticky-willy
Galium asprellum Michx. - rough bedstraw
Galium boreale L. - northern bedstraw
Galium lanceolatum Torr. - wild licorice
Galium tinctorium L. - stiff bedstraw
Galium triflorum Michx. - sweet-scented bedstraw
Houstonia caerulea L. - Quaker-ladies
Houstonia longifolia Gaertn. - long-leaved bluets
Mitchella repens L. - partridgeberry
Zanthoxylum americanum Mill. - northern prickly-ash
Populus alba L. - white poplar
Populus deltoides - eastern cottonwood
Populus grandidentata Michx. - large-toothed aspen
Populus nigra L. - Lombardy poplar
Populus tremuloides Michx. - trembling aspen
Populus x jackii Sarg. - Jack's poplar
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 lucida Muhl. - shining willow
Salix myricoides Muhl. - blue-leaf willow
Salix nigra Marshall - black willow
Salix pentandra L. - laurel willow
Salix petiolaris Sm. - slender willow
Salix purpurea L. - purple willow
Salix sericea Marshall - silky willow
Salix x fragilis L. - crack willow
Salix x rubens Schrank (pro sp.) - hybrid crack willow
Azolla cristata Kaulf. - floating-fern
Comandra umbellata - false toadflax
Acer ginnala Maxim. - Amur maple
Acer negundo L. - box elder
Acer nigrum F.Michx. - black maple
Acer pensylvanicum L. - striped maple
Acer platanoides L. - Norway maple
Acer saccharinum L. - soft maple
Acer spicatum Lam. - mountain 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 phlomoides L. - orange mullein
Verbascum thapsus L. - flannel plant
Smilax ecirrhata S.Watson - upright carrion-flower
Smilax illinoensis Mangaly - Illinois greenbrier
Smilax lasioneura Hook. - hairy carrion-flower
Smilax tamnoides L. - hellfetter
Datura inoxia Mill. - angel's-trumpet
Datura stramonium L. - thorn-apple
Lycium barbarum L. - matrimony-vine
Physalis alkekengi L. - strawberry ground-cherry
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 lycopersicum L. - garden tomato
Solanum ptychanthum Dunal - West Indian nightshade
Solanum rostratum Dunal - buffalo-bur nightshade
Solanum sarrachoides Sendtn. - hairy nightshade
Staphylea trifolia L. - American bladdernut
Triantha glutinosa (Michx.) Baker - sticky false asphodel
Sparganium emersum Rehmann - narrow-leaved bur-reed
Sparganium natans L. - small 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
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
Urtica dioica - stinging nettle
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
Verbena x perriana Moldenke - Perry's vervain
Viola affinis Leconte - sand violet
Viola arvensis Murray - field violet
Viola cucullata Aiton - marsh blue violet
Viola nephrophylla Greene - northern bog violet
Viola novae-angliae House - New England blue violet
Viola pedata L. - bird's-foot violet
Viola pedata f. pedata - bird's-foot violet
Viola pedata f. rosea Sanders - bird's-foot violet
Viola pedatifida G.Don - prairie violet
Viola pubescens Aiton - yellow violet
Viola sagittata Aiton - arrow-leaved violet
Viola sagittata var. sagittata - arrow-leaved violet
Viola sororia Willd. - hairy wood violet
Viola tricolor L. - pansy violet
Vitis aestivalis - summer grape
Vitis riparia Michx. - river bank grape
Xyris torta Sm. - slender yellow-eyed-grass