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Families: 122
Genera: 487
Species: 1173 (species rank)
Total Taxa: 1311 (including subsp. and var.)

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Poa alsodes A.Gray - woodland bluegrass
Poa annua L. - speargrass
Poa compressa L. - wiregrass
Poa glauca Vahl - glaucous bluegrass
Poa nemoralis L. - wood bluegrass
Poa paludigena Fernald & Wiegand - Patterson's bluegrass
Poa palustris L. - marsh bluegrass
Poa pratensis L. - Kentucky bluegrass
Poa trivialis L. - rough bluegrass
Setaria faberi R.A.W.Herrm. - nodding foxtail
Sorghastrum nutans (L.) Nash - yellow Indian grass
Torreyochloa fernaldii (Hitchc.) Church - Fernald's false manna grass
Phlox paniculata L. - summer phlox
Polygala polygama - racemed milkwort
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 ramosissimum - bushy knotweed
Rumex acetosella L. - sheep sorrel
Rumex britannica L. - British dock
Rumex crispus L. - yellow dock
Rumex longifolius DC. - long-leaved dock
Rumex obtusifolius L. - bitter dock
Rumex patientia L. - patience dock
Pontederia cordata L. - pickerel-weed
Potamogeton amplifolius Tuck. - large-leaved pondweed
Potamogeton confervoides Rchb. - Tuckerman's pondweed
Potamogeton crispus L. - curly pondweed
Potamogeton diversifolius Raf. - water-thread pondweed
Potamogeton epihydrus Raf. - ribbon-leaved 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 robbinsii Oakes - Robbins' pondweed
Potamogeton spirillus Tuck. - spiral-fruited pondweed
Potamogeton strictifolius A.Benn. - straight-leaved pondweed
Potamogeton zosteriformis Fernald - flat-stemmed pondweed
Zannichellia palustris L. - horned-pondweed
Lysimachia ciliata L. - fringed loosestrife
Lysimachia hybrida Michx. - river loosestrife
Lysimachia lanceolata Walter - lance-leaved loosestrife
Lysimachia quadrifolia L. - whorled yellow loosestrife
Lysimachia thyrsiflora L. - tufted loosestrife
Primula mistassinica Michx. - Lake Mistassini primrose
Trientalis borealis Raf. - American starflower
Adiantum pedatum L. - northern maidenhair fern
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
Coptis trifolia (L.) Salisb. - three-leaved gold-thread
Ranunculus abortivus L. - small-flowered buttercup
Ranunculus acris L. - tall buttercup
Ranunculus flabellaris Raf. - yellow water crowfoot
Ranunculus flammula L. - spearwort buttercup
Ranunculus gmelinii DC. - small yellow water-crowfoot
Ranunculus hispidus Michx. - rough buttercup
Ranunculus pensylvanicus L.f. - Pennsylvania buttercup
Ranunculus repens L. - creeping buttercup
Ranunculus sceleratus L. - cursed crowfoot
Thalictrum dioicum L. - quicksilver-weed
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
Agrimonia striata Michx. - roadside agrimony
Alchemilla monticola Opiz - mountain alchemilla
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 douglasii Lindl. - Douglas's hawthorn
Crataegus fluviatilis Sarg. - Fort Sheridan hawthorn
Crataegus macrosperma Ashe - eastern hawthorn
Drymocallis arguta (Pursh) Rydb. - prairie cinquefoil tall cinquefoil tall potentilla
Filipendula ulmaria - queen-of-the-meadow
Geum aleppicum Jacq. - yellow avens
Geum canadense Jacq. - white avens
Geum macrophyllum Willd. - large-leaved avens
Geum rivale L. - water 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 pumila L. - sand cherry
Rosa blanda Aiton - meadow roae
Rosa carolina L. - pasture rose
Rosa rugosa Thunb. - rugose rose
Rubus canadensis L. - smooth highbush blackberry
Rubus flagellaris Willd. - rambling 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 americana Marshall - American mountain ash
Sorbus aucuparia L. - European mountain ash
Spiraea alba var. alba - white meadowsweet
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 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 bebbiana Sarg. - long-beaked willow
Salix discolor Muhl. - pussy willow
Salix eriocephala Michx. - Missouri River willow
Salix humilis Marshall - upland willow
Salix interior Rowlee - sandbar willow
Salix lucida Muhl. - shining willow
Salix nigra Marshall - black willow
Salix pentandra L. - laurel willow
Salix petiolaris Sm. - slender willow
Salix planifolia Pursh - tea-leaved willow
Salix x rubens Schrank (pro sp.) - hybrid crack willow
Arceuthobium pusillum Peck - eastern dwarf mistletoe
Acer negundo L. - box elder
Acer nigrum F.Michx. - black maple
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
Sarracenia purpurea - purple pitcher-plant
Heuchera richardsonii R.Br. - Richardson's alumroot
Mitella diphylla L. - two-leaf miterwort
Mitella nuda L. - small bishop's-cap
Scrophularia lanceolata Pursh - lance-leaf figwort
Verbascum phlomoides L. - orange 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
Leucophysalis grandiflora (Hook.) Rydb. - white-flowered ground-cherry
Physalis virginiana var. virginiana - Virginia ground-cherry
Solanum dulcamara L. - deadly nightshade
Solanum ptychanthum Dunal - West Indian nightshade
Taxus canadensis Marshall - ground-hemlock
Dirca palustris L. - rope-bark
Sparganium americanum Nutt. - American bur-reed
Sparganium angustifolium Michx. - narrow-leaved bur-reed
Sparganium emersum Rehmann - narrow-leaved bur-reed
Sparganium eurycarpum Engelm. - broad-fruit 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
Laportea canadensis (L.) Wedd. - Canadian wood-nettle
Pilea fontana (Lunell) Rydb. - lesser clearweed
Pilea pumila (L.) A.Gray - Canadian clearweed
Verbena hastata L. - swamp verbena
Verbena urticifolia L. - white vervain
Viola adunca Sm. - sand violet
Viola cucullata Aiton - marsh blue violet
Viola nephrophylla Greene - northern bog violet
Viola novae-angliae House - New England blue violet
Viola pedata f. rosea Sanders - bird's-foot violet
Viola pubescens Aiton - yellow violet
Viola renifolia A.Gray - white violet
Viola sororia Willd. - hairy wood violet
Vitis riparia Michx. - river bank grape
Xyris torta Sm. - slender yellow-eyed-grass