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

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Schoenoplectus torreyi (Olney) Palla - Torrey's three-square bulrush
Scirpus sp. L. - Bulrush
Scirpus atrocinctus Fernald - black-girdled wool-grass
Scirpus atrovirens Willd. - dark-green bulrush
Scirpus hattorianus Makino - mosquito bulrush
Drosera anglica Huds. - English sundew
Drosera intermedia Hayne - spoon-leaf sundew
Drosera linearis Goldie - slender-leaved sundew
Drosera rotundifolia L. - round-leaved sundew
Cystopteris sp. Bernh. - Bladder Fern
Cystopteris bulbifera (L.) Bernh. - bulblet fragile fern
Cystopteris fragilis (L.) Bernh. - northern fragile fern
Cystopteris laurentiana (Weath.) Blasdell - St. Lawrence bladder fern
Cystopteris tenuis (Michx.) Desv. - upland brittle bladder fern
Dryopteris fragrans (L.) Schott - fragrant wood fern
Gymnocarpium X intermedium Sarvela - intermediate oak fern
Onoclea sensibilis L. - sensitive fern
Shepherdia canadensis (L.) Nutt. - russet buffalo-berry
Equisetum arvense L. - field horsetail
Equisetum fluviatile L. - water horsetail
Equisetum palustre L. - marsh horsetail
Equisetum pratense Ehrh. - meadow horsetail
Equisetum scirpoides Michx. - sedge horsetail
Equisetum sylvaticum L. - woodland horsetail
Equisetum variegatum subsp. variegatum - variegated scouring rush
Epigaea repens L. - trailing-arbutus
Monotropa uniflora L. - Indian-pipe
Orthilia secunda (L.) House - one-sided wintergreen
Pyrola sp. L. - Shinleaf
Pyrola americana Sweet - round-leaved shin-leaf
Pyrola elliptica Nutt. - wax-flower shin-leaf
Pyrola minor L. - small shin-leaf
Vaccinium angustifolium Aiton - low sweet blueberry
Vaccinium macrocarpon Aiton - large cranberry
Vaccinium myrtilloides Michx. - velvet-leaf huckleberry
Vaccinium oxycoccos L. - small cranberry
Vaccinium vitis-idaea - mountain-cranberry
Euphorbia corollata L. - flowering spurge
Euphorbia cyparissias L. - graveyard spurge
Euphorbia glyptosperma Engelm. - ridge-seeded spurge
Caragana arborescens Lam. - Siberian pea-shrub
Dalea candida var. candida - white prairie-clover
Dalea purpurea var. purpurea - violet prairie-clover
Desmodium canadense (L.) DC. - showy tick-trefoil
Lathyrus sp. L. - Wild Pea
Lathyrus latifolius L. - perennial pea-vine
Lathyrus palustris L. - slender-stem pea-vine
Lathyrus pratensis L. - yellow vetchling
Lathyrus sylvestris L. - perennial pea
Lathyrus tuberosus L. - tuberous vetchling
Lespedeza capitata Michx. - round-headed lespedeza
Lotus corniculatus L. - bird's-foot trefoil
Lupinus perennis L. - wild lupine
Lupinus polyphyllus Lindl. - big-leaf lupine
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
Trifolium arvense L. - rabbit-foot clover
Trifolium aureum Pollich - yellow hop clover
Trifolium hybridum L. - alsike clover
Trifolium repens L. - white clover
Vicia americana - American vetch
Vicia cracca L. - cow vetch
Vicia villosa Roth - winter vetch
Quercus rubra L. - northern red oak
Gentiana andrewsii var. andrewsii - prairie closed gentian
Gentiana rubricaulis Schwein. - red-stemmed gentian
Geranium sp. L. - Crane's-Bill
Geranium carolinianum L. - Carolina geranium
Geranium maculatum L. - wild geranium
Ribes sp. L. - Gooseberry
Ribes americanum Mill. - wild black currant
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 rubrum L. - garden red currant
Ribes triste Pall. - wild red currant
Myriophyllum alterniflorum DC. - alternate-flowered water-milfoil
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 tenellum Bigelow - slender water-milfoil
Myriophyllum verticillatum L. - whorled water-milfoil
Hamamelis virginiana L. - American witch-hazel
Elodea canadensis Michx. - common waterweed
Hypericum sp. L. - St. John's-Wort
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 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
Triadenum virginicum (L.) Raf. - Virginia marsh St. John's-wort
Iris pseudacorus L. - yellow water iris
Iris versicolor L. - northern blue flag
Sisyrinchium angustifolium Mill. - stout blue-eyed-grass
Sisyrinchium montanum Greene - strict blue-eyed grass
Sisyrinchium montanum var. montanum - strict blue-eyed grass
Sisyrinchium mucronatum Michx. - needle-tip blue-eyed-grass
Isoëtes sp. L. - Quillwort
Isoëtes echinospora Durieu - stiff quillwort
Isoëtes lacustris L. - large-spored quillwort
Juglans nigra L. - black walnut
Juncus articulatus L. - jointed rush
Juncus bufonius L. - toad rush
Juncus canadensis J.Gay - Canadian rush
Juncus dudleyi Wiegand - Dudley's rush
Juncus effusus L. - soft rush
Juncus filiformis L. - thread rush
Juncus nodosus L. - knotted rush
Juncus pelocarpus E.Mey. - brown-fruited rush
Juncus tenuis Willd. - roadside rush
Juncus vaseyi Engelm. - Vasey's rush
Triglochin sp. L. - Arrow Grass
Triglochin maritima L. - seaside arrow-grass
Triglochin palustris L. - slender bog arrow-grass
Agastache foeniculum (Pursh) Kuntze - lavender giant hyssop
Ajuga genevensis L. - standing bugle
Dracocephalum parviflorum Nutt. - American dragonhead
Lycopus uniflorus Michx. - northern water-horehound
Lycopus virginicus L. - Virginia water-horehound
Mentha suaveolens Ehrh. - pineapple mint
Monarda fistulosa - wild bergamot
Scutellaria lateriflora L. - mad-dog skullcap
Stachys pilosa Nutt. - marsh hedge-nettle
Utricularia sp. - Bladderwort
Utricularia cornuta Michx. - naked 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
Erythronium albidum Nutt. - white trout-lily
Lilium michiganense Farw. - Turk's-cap lily
Lindernia dubia (L.) Pennell - moist bank pimpernel
Diphasiastrum complanatum (L.) Holub - northern running-pine
Huperzia sp. - Fir-Moss
Lycopodiella sp. Holub - Bog Clubmoss
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 neglecta Wallr. - common mallow
Trillium cernuum L. - whip-poor-will flower
Menispermum canadense L. - common moonseed
Menyanthes trifoliata L. - common buckbean
Mollugo verticillata L. - Indian chickweed
Claytonia virginica L. - Virginia spring-beauty
Myrica sp. L. - Bayberry
Myrica gale L. - sweet gale
Nuphar sp. - Yellow Water-Lily
Nuphar variegata Durand - bull-head pond-lily
Nuphar X rubrodisca Morong - intermediate pond-lily
Nymphaea odorata Aiton - fragrant water-lily
Circaea alpina subsp. alpina - small 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 parviflora L. - small-flowered evening-primrose
Oenothera perennis L. - small sundrops
Oenothera serrulata Nutt. - yellow sundrops
Oenothera villosa subsp. villosa - hairy evening-primrose
Botrychium lunaria (L.) Sw. - moonwort grape fern
Botrychium minganense Vict. - Mingan's moonwort
Botrychium simplex E.Hitchc. - small grape fern
Ophioglossum pusillum Raf. - northern adder's-tongue
Sceptridium dissectum (Spreng.) Lyon - lace-frond grape fern
Arethusa bulbosa L. - swamp-pink
Calopogon tuberosus - tuberous grass pink
Cypripedium acaule Aiton - small pink lady's-slipper
Cypripedium parviflorum Salisb. - yellow lady's-slipper
Goodyera oblongifolia Raf. - western rattlesnake-plantain
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 convallarioides (Sw.) Rich. - broad-leaved twayblade
Neottia cordata (L.) Rich. - heart-leaf 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 orbiculata (Pursh) Lindl. - large round-leaved orchid
Platanthera psycodes (L.) Lindl. - lesser purple fringed orchid
Spiranthes casei var. casei - Case's lady's-tresses
Spiranthes cernua (L.) Rich. - nodding lady's-tresses
Spiranthes lacera var. lacera - northern slender lady's-tresses
Spiranthes romanzoffiana Cham. - hooded lady's-tresses
Agalinis paupercula (A.Gray) Britton - smooth false foxglove
Castilleja coccinea (L.) Spreng. - scarlet painted-cup
Melampyrum lineare Desr. - narrow-leaved cow-wheat
Melampyrum lineare var. lineare - narrow-leaved cow-wheat
Orobanche uniflora L. - one-flowered broom-rape
Osmunda cinnamomea L. - cinnamon fern
Osmunda claytoniana L. - interrupted fern
Oxalis dillenii Jacq. - southern yellow wood-sorrel
Oxalis stricta L. - tall wood-sorrel
Dicentra cucullaria (L.) Bernh. - Dutchman's-breeches
Penthorum sedoides L. - ditch stonecrop
Mimulus moschatus Douglas - musky monkey-flower
Phryma leptostachya L. - American lop-seed
Pinus strobus L. - eastern white pine
Callitriche hermaphroditica L. - northern water-starwort
Callitriche palustris L. - vernal water-starwort
Chelone glabra L. - white turtlehead
Gratiola neglecta Torr. - clammy hedge-hyssop
Hippuris vulgaris L. - mare's tail
Linaria dalmatica (L.) Mill. - Dalmatian toadflax
Linaria vulgaris Mill. - butter-and-eggs
Plantago patagonica Jacq. - woolly plantain
Plantago rugelii Decne. - Rugel's plantain
Veronica arvensis L. - corn speedwell
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
Alopecurus pratensis L. - meadow foxtail
Ammophila breviligulata Fernald - American beach-grass
Anthoxanthum odoratum L. - sweet vernal grass
Aristida basiramea Engelm. ex Vasey - fork-tip three-awn grass
Avena fatua L. - wild oats
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 racemosus L. - smooth brome
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
Elymus canadensis L. - Great Plains wild-rye
Elymus curvatus Piper - awnless wild-rye
Elymus diversiglumis Scribn. & Ball - unequal-glumed wild-rye
Elymus hystrix L. - glumeless wild-rye
Elymus hystrix var. hystrix - glumeless wild-rye
Eragrostis minor Host - little love grass
Festuca rubra L. - red fescue
Glyceria borealis (Nash) Batch. - boreal manna grass
Glyceria grandis S.Watson - reed manna grass
Holcus lanatus L. - velvet grass
Hordeum jubatum L. - squirrel-tail grass
Lolium perenne L. - perennial rye grass
Lolium perenne subsp. perenne - perennial rye grass
Milium effusum L. - wood millet
Muhlenbergia uniflora (Muhl.) Fernald - one-flowered satin grass
Panicum virgatum L. - switch grass
Phalaris arundinacea L. - reed canary grass
Poa alsodes A.Gray - woodland bluegrass