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Families: 112
Genera: 386
Species: 869 (species rank)
Total Taxa: 1007 (including subsp. and var.)

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Ribes cynosbati L. - prickly wild gooseberry
Ribes glandulosum Grauer - skunk currant
Ribes hirtellum Michx. - swamp gooseberry
Ribes hudsonianum Richardson - northern black currant
Ribes lacustre (Pers.) Poir. - spiny swamp currant
Ribes triste Pall. - wild red currant
Myriophyllum sp. L. - Water-Milfoil
Myriophyllum sibiricum Kom. - short-spike water-milfoil
Myriophyllum spicatum L. - spike water-milfoil
Myriophyllum tenellum Bigelow - slender water-milfoil
Hamamelis virginiana L. - American witch-hazel
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 ellipticum Hook. - pale 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
Iris versicolor L. - northern blue flag
Sisyrinchium angustifolium Mill. - stout blue-eyed-grass
Sisyrinchium atlanticum E.P.Bicknell - eastern blue-eyed-grass
Sisyrinchium montanum Greene - strict blue-eyed grass
Sisyrinchium strictum E.P.Bicknell - mountain blue-eyed-grass
Isoëtes sp. L. - Quillwort
Isoëtes echinospora Durieu - stiff quillwort
Isoëtes lacustris L. - large-spored quillwort
Juglans cinerea L. - white walnut
Juncus articulatus L. - jointed rush
Juncus bufonius L. - toad rush
Juncus canadensis J.Gay - Canadian rush
Juncus effusus L. - soft rush
Juncus nodosus L. - knotted rush
Juncus pelocarpus E.Mey. - brown-fruited rush
Juncus tenuis Willd. - roadside rush
Luzula acuminata Raf. - hairy wood rush
Triglochin maritima L. - seaside arrow-grass
Ajuga genevensis L. - standing bugle
Ajuga reptans L. - common bugle
Galeopsis tetrahit L. - hemp-nettle
Lycopus sp. L. - Water-Horehound
Lycopus uniflorus Michx. - northern water-horehound
Monarda fistulosa - wild bergamot
Scutellaria lateriflora L. - mad-dog skullcap
Utricularia cornuta Michx. - naked bladderwort
Utricularia geminiscapa Benj. - twin-stemmed bladderwort
Utricularia intermedia Hayne - northern bladderwort
Utricularia minor L. - small bladderwort
Utricularia vulgaris L. - great bladderwort
Erythronium americanum - yellow trout-lily
Lindernia dubia (L.) Pennell - moist bank pimpernel
Diphasiastrum complanatum (L.) Holub - northern running-pine
Lycopodiella inundata (L.) Holub - northern bog club-moss
Lycopodium sp. L. - Bog Clubmoss
Lycopodium clavatum L. - staghorn club-moss
Lythrum salicaria L. - spiked loosestrife
Malva moschata L. - musk mallow
Malva pusilla Sm. - low mallow
Trillium cernuum L. - whip-poor-will flower
Menyanthes trifoliata L. - common buckbean
Mollugo verticillata L. - Indian chickweed
Claytonia virginica L. - Virginia spring-beauty
Myrica gale L. - sweet gale
Mirabilis nyctaginea (Michx.) MacMill. - heart-leaved umbrella-wort
Nuphar variegata Durand - bull-head pond-lily
Nuphar X rubrodisca Morong - intermediate pond-lily
Nymphaea sp. L. - Water-Lily
Nymphaea odorata Aiton - fragrant water-lily
Circaea alpina L. - small enchanter's-nightshade
Circaea alpina subsp. alpina - small enchanter's-nightshade
Circaea canadensis (L.) Hill - broad-leaf enchanter's-nightshade
Circaea canadensis subsp. canadensis (L.) Hill - broad-leaf enchanter's-nightshade
Epilobium ciliatum Raf. - hairy willow-herb
Epilobium coloratum Biehler - eastern willow-herb
Epilobium leptophyllum Raf. - fen willow-herb
Epilobium palustre L. - marsh willow-herb
Epilobium strictum Muhl. ex Spreng. - northeastern willow-herb
Oenothera biennis L. - common evening-primrose
Oenothera nuttallii Sweet - white evening-primrose
Oenothera parviflora L. - small-flowered evening-primrose
Oenothera villosa subsp. villosa - hairy evening-primrose
Botrychium lanceolatum - triangle moonwort
Botrychium simplex E.Hitchc. - small grape fern
Sceptridium dissectum (Spreng.) Lyon - lace-frond grape fern
Arethusa bulbosa L. - swamp-pink
Cypripedium acaule Aiton - small pink lady's-slipper
Cypripedium parviflorum Salisb. - yellow lady's-slipper
Goodyera pubescens (Willd.) R.Br. - downy rattlesnake-plantain
Goodyera repens (L.) R.Br. - lesser rattlesnake-plantain
Goodyera tesselata Lodd. - tesselated rattlesnake-plantain
Liparis loeselii (L.) Rich. - Loesel's twayblade
Malaxis unifolia Michx. - green adder's-mouth
Neottia cordata (L.) Rich. - heart-leaf twayblade
Platanthera clavellata (Michx.) Luer - small green fringed orchid
Platanthera dilatata - white bog orchid
Platanthera huronensis (Nutt.) Lindl. - tall nothern bog orchid
Platanthera psycodes (L.) Lindl. - lesser purple fringed orchid
Spiranthes cernua (L.) Rich. - nodding lady's-tresses
Spiranthes lacera var. lacera - northern slender lady's-tresses
Spiranthes romanzoffiana Cham. - hooded lady's-tresses
Castilleja coccinea (L.) Spreng. - scarlet painted-cup
Melampyrum lineare Desr. - narrow-leaved cow-wheat
Osmunda cinnamomea L. - cinnamon fern
Osmunda claytoniana L. - interrupted fern
Osmunda regalis L. - royal fern
Oxalis acetosella L. - mountain wood-sorrel
Oxalis dillenii Jacq. - southern yellow wood-sorrel
Oxalis stricta L. - tall wood-sorrel
Dicentra cucullaria (L.) Bernh. - Dutchman's-breeches
Mimulus glabratus - round-leaved monkey-flower
Mimulus ringens - monkey-flower
Phryma leptostachya L. - American lop-seed
Pinus strobus L. - eastern white pine
Callitriche palustris L. - vernal water-starwort
Chelone glabra L. - white turtlehead
Digitalis purpurea L. - purple foxglove
Gratiola aurea Pursh - yellow hedge-hyssop
Gratiola neglecta Torr. - clammy hedge-hyssop
Linaria vulgaris Mill. - butter-and-eggs
Plantago rugelii Decne. - Rugel's plantain
Veronica longifolia L. - long-leaved speedwell
Veronica peregrina L. - purslane speedwell
Veronica scutellata L. - skullcap speedwell
Veronica serpyllifolia L. - thyme-leaved speedwell
Agrostis perennans - upland bent grass
Agrostis stolonifera L. - creeping tickle grass
Alopecurus aequalis Sobol. - short-awned foxtail
Avena fatua L. - wild oats
Bromus ciliatus L. - fringed brome
Bromus inermis Leyss. - smooth brome
Dactylis glomerata L. - orchard grass
Danthonia compressa Austin - flattend oat grass
Dichanthelium latifolium (L.) Harvill - broad-leaved panic grass
Dichanthelium linearifolium (Scribn.) Gould - slender-leaved panic grass
Elymus hystrix L. - glumeless wild-rye
Elymus hystrix var. hystrix - glumeless wild-rye
Elymus virginicus - Virginia wild-rye
Eragrostis minor Host - little love grass
Eragrostis pectinacea - tufted love grass
Festuca rubra L. - red fescue
Glyceria borealis (Nash) Batch. - boreal manna grass
Glyceria grandis S.Watson - reed manna grass
Hordeum jubatum L. - squirrel-tail grass
Lolium perenne L. - perennial rye grass
Milium effusum L. - wood millet
Panicum capillare - witch grass
Phalaris arundinacea L. - reed canary grass
Poa alsodes A.Gray - woodland bluegrass
Poa annua L. - speargrass
Poa compressa L. - wiregrass
Poa languida Hitchc. - weak bluegrass
Poa nemoralis L. - wood bluegrass
Poa paludigena Fernald & Wiegand - Patterson's bluegrass
Poa palustris L. - marsh bluegrass
Poa pratensis L. - Kentucky bluegrass
Setaria faberi R.A.W.Herrm. - nodding foxtail
Setaria pumila - yellow foxtail
Torreyochloa fernaldii (Hitchc.) Church - Fernald's false manna grass
Zizania aquatica L. - southern wild rice
Zizania palustris L. - northern wild rice
Phlox divaricata - woodland phlox
Fallopia cilinodis (Michx.) Holub - fringed black bindweed
Persicaria maculosa Gray - spotted lady's-thumb
Polygonum achoreum S.F.Blake - Blake's knotweed
Polygonum erectum L. - erect 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
Pontederia cordata L. - pickerel-weed
Potamogeton amplifolius Tuck. - large-leaved pondweed
Potamogeton confervoides Rchb. - Tuckerman's 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 praelongus Wulfen - white-stemmed pondweed
Potamogeton pusillus L. - small pondweed
Potamogeton robbinsii Oakes - Robbins' pondweed
Potamogeton spirillus Tuck. - spiral-fruited pondweed
Potamogeton zosteriformis Fernald - flat-stemmed pondweed
Lysimachia ciliata L. - fringed 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 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
Coptis trifolia (L.) Salisb. - three-leaved gold-thread
Ranunculus abortivus L. - small-flowered buttercup
Ranunculus acris L. - tall buttercup
Ranunculus flammula L. - spearwort buttercup
Ranunculus pensylvanicus L.f. - Pennsylvania buttercup
Ranunculus recurvatus - hooked buttercup
Thalictrum dioicum L. - quicksilver-weed
Frangula alnus Mill. - glossy buckthorn
Rhamnus alnifolia L'Hér. - alder-leaf buckthorn
Agrimonia gryposepala Wallr. - tall hairy agrimony
Agrimonia striata Michx. - roadside agrimony
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
Drymocallis arguta (Pursh) Rydb. - prairie cinquefoil tall cinquefoil tall potentilla
Fragaria vesca - woodland strawberry
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 serotina Ehrh. - wild black cherry
Prunus virginiana L. - chokecherry
Rosa arkansana Porter - wild prairie rose
Rosa blanda Aiton - meadow roae
Rubus canadensis L. - smooth highbush blackberry
Rubus flagellaris Willd. - rambling dewberry
Rubus parviflorus Nutt. - western thimbleberry
Rubus pubescens Raf. - dwarf red blackberry
Rubus setosus Bigelow - Wheeler's blackberry
Sorbus americana Marshall - American mountain ash
Spiraea alba Du Roi - eastern meadowsweet
Spiraea alba var. alba - white meadowsweet
Spiraea tomentosa - steeplebush
Galium album Mill. - wild madder
Galium asprellum Michx. - rough bedstraw
Galium boreale L. - northern bedstraw
Galium lanceolatum Torr. - wild licorice
Galium obtusum - wild madder
Galium tinctorium L. - stiff bedstraw
Galium trifidum L. - small bedstraw
Galium triflorum Michx. - sweet-scented bedstraw
Galium verum L. - yellow spring bedstraw
Mitchella repens L. - partridgeberry
Populus grandidentata Michx. - large-toothed aspen
Populus tremuloides Michx. - trembling aspen
Salix bebbiana Sarg. - long-beaked willow
Salix discolor Muhl. - pussy willow
Salix humilis Marshall - upland willow
Salix lucida Muhl. - shining 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
Arceuthobium pusillum Peck - eastern dwarf mistletoe
Comandra umbellata - false toadflax
Acer negundo L. - box elder
Acer rubrum L. - red maple
Acer saccharinum L. - soft maple
Acer spicatum Lam. - mountain maple
Sarracenia purpurea - purple pitcher-plant
Mitella diphylla L. - two-leaf miterwort
Mitella nuda L. - small bishop's-cap
Scrophularia lanceolata Pursh - lance-leaf figwort
Verbascum thapsus L. - giant mullein
Smilax ecirrhata S.Watson - upright carrion-flower
Smilax illinoensis Mangaly - Illinois greenbrier
Smilax tamnoides L. - hellfetter
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 natans L. - small bur-reed
Typha latifolia L. - common cat-tail
Ulmus americana L. - white 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 blanda Willd. - sweet white violet
Viola canadensis L. - tall white violet
Viola cucullata Aiton - marsh blue violet
Viola macloskeyi - wild white violet
Viola novae-angliae House - New England blue violet
Viola pubescens Aiton - yellow violet