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Families: 112
Genera: 363
Species: 799 (species rank)
Total Taxa: 811 (including subsp. and var.)

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Acorus calamus L. - sweet-flag
Viburnum acerifolium L. - maple-leaved viburnum
Viburnum lentago L. - sheepberry
Viburnum opulus L. - high-bush cranberry
Viburnum trilobum Marshall - high-bush cranberry
Alisma sp. L. - Water-plantain
Sagittaria graminea subsp. graminea - grass-leaved sagittaria
Sagittaria rigida Pursh - stiff arrow-head
Amaranthus albus L. - tumbleweed amaranth
Chenopodium simplex (Torr.) Raf. - maple-leaved goosefoot
Rhus glabra L. - smooth sumac
Rhus typhina L. - staghorn sumac
Cicuta bulbifera L. - bulblet water-hemlock
Heracleum maximum W.Bartram - American cow-parsnip
Osmorhiza longistylis (Torr.) DC. - smooth sweet cicely
Pastinaca sativa L. - wild parsnip
Sanicula marilandica L. - Maryland sanicle
Sium suave Walter - water-parsnip
Apocynum androsaemifolium L. - spreading dogbane
Ilex verticillata (L.) A.Gray - common winterberry
Arisaema triphyllum - Jack-in-the-pulpit
Calla palustris L. - wild calla
Lemna minor L. - common duckweed
Lemna trisulca L. - star duckweed
Lemna turionifera Landolt - Turion duckweed
Aralia hispida Vent. - bristly sarsaparilla
Aralia nudicaulis L. - wild sarsaparilla
Aralia racemosa L. - life-of-man
Asarum canadense L. - wild-ginger
Maianthemum canadense Desf. - wild lily-of-the-valley
Maianthemum canadense var. canadense - wild lily-of-the-valley
Maianthemum racemosum - Solomon's-plume
Maianthemum trifolium (L.) Sloboda - three-leaf Solomon's-plume
Antennaria howellii - Howell's pussy-toes
Antennaria neglecta Greene - field pussy-toes
Antennaria parlinii Fernald - plantain pussy-toes
Artemisia biennis Willd. - biennial wormwood
Bidens cernua L. - nodding bur-marigold
Bidens connata Muhl. ex Willd. - purple-stemmed tickseed
Bidens tripartita L. - swamp tickseed
Cirsium muticum Michx. - swamp thistle
Doellingeria umbellata (Mill.) Nees - tall flat-topped white aster
Erigeron annuus (L.) Pers. - eastern daisy fleabane
Eurybia macrophylla (L.) Cass. - large-leaved aster
Euthamia sp. - Flat-Topped Goldenrod
Euthamia graminifolia (L.) Nutt. - grass-leaved goldenrod
Eutrochium maculatum L. - spotted Joe-Pye-weed
Gnaphalium uliginosum L. - marsh cudweed
Helenium autumnale L. - common sneezeweed
Helianthus annuus L. - garden sunflower
Helianthus giganteus L. - tall sunflower
Helianthus strumosus L. - rough-leaved sunflower
Heliopsis helianthoides (L.) Sweet - sunflower-everlasting
Hieracium caespitosum Dumort. - yellow king-devil
Hieracium scabrum Michx. - sticky hawkweed
Hieracium umbellatum L. - northern hawkweed
Krigia biflora (Walter) S.F.Blake - orange dwarf-dandelion
Lactuca canadensis L. - wild lettuce
Packera aurea (L.) A.Löve & D.Löve - heart-leaved groundsel
Prenanthes alba L. - white rattlesnakeroot
Rudbeckia hirta - black-eyed Susan
Rudbeckia laciniata L. - wild golden-glow
Solidago sp. L. - Goldenrod
Solidago canadensis L. - common goldenrod
Solidago flexicaulis L. - zigzag goldenrod
Solidago gigantea Aiton - smooth goldenrod
Solidago juncea Aiton - early goldenrod
Solidago nemoralis Aiton - old-field goldenrod
Solidago uliginosa Nutt. - northern bog goldenrod
Sonchus arvensis L. - perennial sow-thistle
Tragopogon sp. L. - Goat's Beard
Tragopogon dubius Scop. - yellow salsify
Tragopogon pratensis L. - yellow goat's-beard
Impatiens capensis Meerb. - spotted touch-me-not
Berberis thunbergii DC. - Japanese barberry
Alnus incana - swamp alder
Betula pumila L. - swamp birch
Betula x sandbergii Britton - Sandberg's birch
Corylus americana Walter - American hazelnut
Corylus cornuta - beaked hazelnut
Cynoglossum boreale Fernald - northern wild comfrey
Hydrophyllum virginianum L. - Virginia waterleaf
Myosotis scorpioides L. - water scorpion-grass
Myosotis sylvatica Ehrh. ex Hoffm. - woodland forget-me-not
Berteroa incana (L.) DC. - hoary-alyssum
Cardamine pensylvanica Muhl. ex Willd. - Pennsylvania bitter-cress
Cardamine pratensis - cuckoo-flower
Erysimum cheiranthoides L. - worm-seed wallflower
Lepidium densiflorum Schrad. - small peppergrass
Sisymbrium altissimum L. - tall tumble mustard
Turritis glabra L. - tower rock-cress
Campanula aparinoides Pursh - marsh bellflower
Lobelia dortmanna L. - water lobelia
Lobelia inflata L. - Indian-tobacco
Lobelia kalmii L. - Ontario lobelia
Diervilla lonicera Mill. - northern bush-honeysuckle
Linnaea borealis - twinflower
Lonicera dioica L. - red honeysuckle
Lonicera hirsuta Eaton - hairy honeysuckle
Lonicera villosa (Michx.) Schult. - mountain fly honeysuckle
Triosteum aurantiacum E.P.Bicknell - orange-fruit horse-gentian
Triosteum aurantiacum var. aurantiacum - orange-fruit horse-gentian
Arenaria serpyllifolia - thyme-leaved sandwort
Atocion armeria (L.) Raf. - sweet-William silene
Cerastium fontanum - common mouse-ear chickweed
Dianthus armeria - Deptford pink
Saponaria sp. - Bouncing-Bet
Scleranthus annuus - German knotgrass
Silene antirrhina L. - sleepy silene
Silene latifolia Poir. - white cockle
Spergula arvensis L. - corn spurry
Stellaria media (L.) Vill. - common chickweed
Celastrus scandens L. - climbing bittersweet
Uvularia grandiflora Sm. - large-flowered bellwort
Cornus alternifolia L.f. - pagoda dogwood
Cornus canadensis L. - dwarf cornel
Cornus foemina Mill. - panicled dogwood
Cornus rugosa Lam. - round-leaved dogwood
Cornus sericea L. - red osier dogwood
Thuja occidentalis L. - northern white-cedar
Carex sp. L. - Sedge
Carex arcta Boott - northern clustered sedge
Carex arctata Boott - drooping woodland sedge
Carex assiniboinensis W.Boott - Assiniboine sedge
Carex aurea Nutt. - golden-fruited sedge
Carex backii W.Boott - Rocky Mountain sedge
Carex blanda Dewey - wood sedge
Carex buxbaumii Wahlenb. - Buxbaum's sedge
Carex canescens L. - silvery sedge
Carex castanea Wahlenb. - chestnut woodland sedge
Carex communis - fibrous-root sedge
Carex communis var. communis - fibrous-root sedge
Carex comosa Boott - bristly sedge
Carex crawei Dewey - early fen sedge
Carex crawfordii Fernald - Crawford's sedge
Carex cryptolepis Mack. - small yellow sedge
Carex deweyana - Dewey's sedge
Carex diandra Schrank - lesser panicled sedge
Carex disperma Dewey - two-seeded bog sedge
Carex flava L. - yellow sedge
Carex foenea Willd. - bronze-headed oval sedge
Carex gracillima Schwein. - purple-sheathed graceful sedge
Carex granularis Muhl. ex Willd. - limestone meadow sedge
Carex gynandra Schwein. - nodding sedge
Carex hirtifolia Mack. - pubescent sedge
Carex houghtoniana Torr. ex Dewey - Houghton's woolly sedge
Carex interior L.H.Bailey - inland star sedge
Carex intumescens Rudge - swollen sedge
Carex lacustris Willd. - rip-gut sedge
Carex leptalea - slender sedge
Carex leptonervia (Fernald) Fernald - nerveless woodland sedge
Carex limosa L. - mud sedge
Carex magellanica - boreal bog sedge
Carex normalis Mack. - spreading oval sedge
Carex oligosperma Michx. - few-seeded sedge
Carex ormostachya Wiegand - necklace-spike wood sedge
Carex peckii Howe - Peck's sedge
Carex pensylvanica Lam. - Pennsylvania sedge
Carex plantaginea Lam. - plantain-leaved wood sedge
Carex prairea Dewey - prairie sedge
Carex projecta Mack. - necklace sedge
Carex pseudocyperus L. - false bristly sedge
Carex retrorsa Schwein. - retrorse sedge
Carex rostrata Stokes - northern yellow lake sedge
Carex scoparia var. scoparia - lance-fruited oval sedge
Carex sterilis Willd. - fen star sedge
Carex stipata - owl-fruit sedge
Carex stricta Lam. - uptight sedge
Carex tenera Dewey - narrow-leaved oval sedge
Carex tenuiflora Wahlenb. - sparse-flowered sedge
Carex tonsa var. rugosperma (Mack.) Crins - wrinkled-seeded oak sedge
Carex trisperma Dewey - three-seeded sedge
Carex tuckermanii Dewey - Tuckerman's sedge
Carex utriculata Boott - Northwest Territory sedge
Carex vaginata Tauscher - sheathed sedge
Carex vesicaria L. - tufted lake sedge
Carex viridula - little green sedge
Carex woodii Dewey - Wood's stiff sedge
Cyperus bipartitus Torr. - slender flat sedge
Cyperus houghtonii Torr. - Houghton's flat sedge
Dulichium arundinaceum - three-way sedge
Eleocharis elliptica Kunth - elliptic spike-rush
Eleocharis flavescens - green spike-rush
Eleocharis intermedia Schult. - matted spike-rush
Eriophorum sp. L. - Cotton-Grass
Eriophorum tenellum Nutt. - few-nerved cotton-grass
Eriophorum vaginatum L. - tussock cotton-grass
Eriophorum virginicum L. - tawny cotton-grass
Rhynchospora alba (L.) Vahl - white beak-rush
Rhynchospora capillacea Torr. - needle beak sedge
Schoenoplectus pungens (Vahl) Palla - common three-square bulrush
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 intermedia Hayne - spoon-leaf sundew
Drosera rotundifolia L. - round-leaved sundew
Athyrium filix-femina - northern lady fern
Cystopteris bulbifera (L.) Bernh. - bulblet fragile fern
Cystopteris fragilis (L.) Bernh. - northern fragile fern
Cystopteris tenuis (Michx.) Desv. - upland brittle bladder fern
Onoclea sensibilis L. - sensitive fern
Equisetum arvense L. - field horsetail
Equisetum fluviatile L. - water horsetail
Equisetum hyemale - scouring rush 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
Chimaphila umbellata - prince's-pine
Epigaea repens L. - trailing-arbutus
Monotropa uniflora L. - Indian-pipe
Orthilia secunda (L.) House - one-sided wintergreen
Pyrola asarifolia - pink shin-leaf
Pyrola elliptica Nutt. - wax-flower shin-leaf
Vaccinium angustifolium Aiton - low sweet blueberry
Vaccinium macrocarpon Aiton - large cranberry
Vaccinium myrtilloides Michx. - velvet-leaf huckleberry
Vaccinium oxycoccos L. - small cranberry
Lotus corniculatus L. - bird's-foot trefoil
Medicago lupulina L. - black medick
Melilotus albus Medik. - white sweet-clover
Melilotus officinalis (L.) Lam. - yellow sweet-clover
Trifolium aureum Pollich - yellow hop clover
Trifolium hybridum L. - alsike clover
Trifolium repens L. - white clover
Vicia americana - American vetch
Quercus rubra L. - northern red oak
Gentiana andrewsii var. andrewsii - prairie closed gentian
Gentiana rubricaulis Schwein. - red-stemmed gentian
Halenia deflexa - spurred-gentian
Geranium bicknellii - northern crane's-bill
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 triste Pall. - wild red currant
Myriophyllum sp. L. - Water-Milfoil
Myriophyllum heterophyllum Michx. - various-leaved water-milfoil
Myriophyllum sibiricum Kom. - short-spike water-milfoil
Myriophyllum tenellum Bigelow - slender water-milfoil
Myriophyllum verticillatum L. - whorled water-milfoil
Elodea canadensis Michx. - common waterweed
Najas sp. - Waternymph
Vallisneria sp. - Eel Grass
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 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 strictum E.P.Bicknell - mountain blue-eyed-grass
Isoëtes sp. L. - Quillwort
Isoëtes echinospora - stiff quillwort
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
Luzula acuminata - hairy wood rush
Triglochin maritima L. - seaside arrow-grass
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 gibba L. - humped bladderwort
Utricularia intermedia Hayne - northern bladderwort
Utricularia minor L. - small bladderwort
Utricularia vulgaris L. - great bladderwort
Erythronium americanum - yellow trout-lily
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
Malva moschata L. - musk mallow
Trillium cernuum L. - whip-poor-will flower
Menyanthes trifoliata L. - common buckbean
Mollugo verticillata L. - Indian chickweed
Myrica gale L. - sweet gale
Nuphar variegata Durand - bull-head pond-lily
Nuphar X rubrodisca Morong - intermediate pond-lily
Nymphaea odorata Aiton - fragrant water-lily
Circaea alpina - 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 parviflora L. - small-flowered 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
Corallorhiza striata - striped coralroot
Cypripedium acaule Aiton - small pink lady's-slipper
Cypripedium parviflorum Salisb. - yellow lady's-slipper
Goodyera pubescens (Willd.) R.Br. - downy rattlesnake-plantain