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Families: 109
Genera: 371
Species: 730 (species rank)
Total Taxa: 743 (including subsp. and var.)

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Viburnum acerifolium L. - maple-leaved viburnum
Viburnum lantana L. - wayfaring-tree
Viburnum lentago L. - sheepberry
Viburnum opulus L. - high-bush cranberry
Viburnum trilobum Marshall - high-bush cranberry
Alisma sp. L. - Water-plantain
Alisma triviale Pursh - northern water-plantain
Amaranthus hypochondriacus L. - Prince-of-Wales'-feather
Amaranthus retroflexus L. - wild-beet amaranth
Corispermum pallasii Steven - Siberian bugseed
Salsola tragus L. - tumbleweed
Rhus glabra L. - smooth sumac
Rhus typhina L. - staghorn sumac
Cicuta bulbifera L. - bulblet water-hemlock
Cicuta maculata L. - spotted water-hemlock
Daucus carota L. - wild carrot
Heracleum maximum W.Bartram - American cow-parsnip
Osmorhiza longistylis (Torr.) DC. - smooth sweet cicely
Pastinaca sativa L. - wild parsnip
Sanicula canadensis L. - Canadian sanicle
Sanicula marilandica L. - Maryland sanicle
Sanicula trifoliata E.P.Bicknell - large-fruited black snakeroot
Sium suave Walter - water-parsnip
Apocynum androsaemifolium L. - spreading dogbane
Asclepias exaltata L. - tall milkweed
Asclepias verticillata L. - whorled milkweed
Ilex verticillata (L.) A.Gray - common winterberry
Calla palustris L. - wild calla
Lemna turionifera Landolt - Turion duckweed
Aralia nudicaulis L. - wild sarsaparilla
Aralia racemosa L. - life-of-man
Panax trifolius L. - groundnut
Asarum canadense L. - wild-ginger
Maianthemum canadense Desf. - wild lily-of-the-valley
Maianthemum canadense var. canadense - wild lily-of-the-valley
Maianthemum stellatum (L.) Link - starry false Solomon's-seal
Maianthemum trifolium (L.) Sloboda - three-leaf Solomon's-plume
Ambrosia trifida L. - horse-cane
Antennaria neglecta Greene - field pussy-toes
Antennaria parlinii Fernald - plantain pussy-toes
Anthemis cotula L. - stinking-cotula
Artemisia biennis Willd. - biennial wormwood
Bidens cernua L. - nodding bur-marigold
Bidens connata Muhl. ex Willd. - purple-stemmed tickseed
Bidens frondosa L. - devil's beggar-ticks
Bidens tripartita L. - swamp tickseed
Bidens vulgata Greene - tall beggar-ticks
Carduus nutans L. - nodding thistle
Centaurea jacea L. - brown-ray knapweed
Cirsium muticum Michx. - swamp thistle
Doellingeria umbellata (Mill.) Nees - tall flat-topped white aster
Erigeron annuus (L.) Pers. - eastern daisy fleabane
Eurybia furcata (E.S.Burgess) G.L.Nesom - midwestern white heart-leaved aster
Eurybia macrophylla (L.) Cass. - large-leaved aster
Euthamia graminifolia (L.) Nutt. - grass-leaved goldenrod
Eutrochium maculatum L. - spotted Joe-Pye-weed
Hasteola suaveolens (L.) Pojark. - sweet Indian-plantain
Helenium autumnale L. - common sneezeweed
Helianthus annuus L. - garden sunflower
Helianthus giganteus L. - tall sunflower
Heliopsis helianthoides (L.) Sweet - sunflower-everlasting
Inula helenium L. - elecampane
Krigia biflora (Walter) S.F.Blake - orange dwarf-dandelion
Lactuca canadensis L. - wild lettuce
Packera aurea (L.) A.Löve & D.Löve - heart-leaved groundsel
Polymnia canadensis L. - white-flowered leaf-cup
Prenanthes alba L. - white rattlesnakeroot
Ratibida pinnata (Vent.) Barnhart - pinnate prairie coneflower
Rudbeckia triloba var. triloba - three-lobed coneflower
Senecio vulgaris L. - common groundsel
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
Sonchus arvensis subsp. arvensis L. - perennial sow-thistle
Sonchus asper (L.) Hill - spiny-leaf sow-thistle
Sonchus oleraceus L. - field sow-thistle
Tragopogon dubius Scop. - yellow salsify
Tragopogon pratensis L. - yellow goat's-beard
Xanthium strumarium L. - rough cocklebur
Impatiens capensis Meerb. - spotted touch-me-not
Berberis thunbergii DC. - Japanese barberry
Berberis vulgaris L. - European barberry
Podophyllum peltatum L. - wild mandrake
Betula cordifolia Regel - mountain white birch
Betula pumila L. - swamp birch
Betula x sandbergii Britton - Sandberg's birch
Corylus americana Walter - American hazelnut
Echium vulgare L. - viper's-bugloss
Hydrophyllum virginianum L. - Virginia waterleaf
Lithospermum latifolium Michx. - broad-leaved gromwell
Lithospermum officinale L. - European gromwell
Myosotis arvensis (L.) Hill - field scorpion-grass
Myosotis scorpioides L. - water scorpion-grass
Symphytum officinale L. - common comfrey
Berteroa incana (L.) DC. - hoary-alyssum
Cakile edentula (Bigelow) Hook. - American sea-rocket
Cardamine douglassii Britton - purple spring-cress
Cardamine parviflora L. - small-flowered bitter-cress
Cardamine pensylvanica Muhl. ex Willd. - Pennsylvania bitter-cress
Erysimum cheiranthoides L. - worm-seed wallflower
Hesperis matronalis L. - dame's rocket
Lepidium sp. L. - Pepperwort
Lepidium densiflorum Schrad. - small peppergrass
Sinapis arvensis L. - charlock mustard
Sisymbrium altissimum L. - tall tumble mustard
Campanula aparinoides Pursh - marsh bellflower
Campanula rapunculoides L. - rover bellflower
Lobelia inflata L. - Indian-tobacco
Lobelia kalmii L. - Ontario lobelia
Lobelia siphilitica L. - great blue lobelia
Celtis occidentalis L. - northern hackberry
Diervilla lonicera Mill. - northern bush-honeysuckle
Dipsacus laciniatus L. - cut-leaved teasel
Lonicera dioica L. - red honeysuckle
Lonicera morrowii A.Gray - Morrow's honeysuckle
Lonicera oblongifolia (Goldie) Hook. - swamp fly honeysuckle
Lonicera reticulata Raf. - yellow honeysuckle
Lonicera tatarica L. - Tartarian honeysuckle
Lonicera villosa (Michx.) Schult. - mountain fly honeysuckle
Lonicera X bella Zabel - white-bell honeysuckle
Triosteum aurantiacum E.P.Bicknell - orange-fruit horse-gentian
Triosteum aurantiacum var. aurantiacum - orange-fruit horse-gentian
Arenaria sp. L. - Sandwort
Dianthus armeria - Deptford pink
Silene csereii Baumg. - glaucous campion
Silene latifolia Poir. - white cockle
Stellaria longifolia Muhl. ex Willd. - long-leaved stitchwort
Stellaria media (L.) Vill. - common chickweed
Celastrus orbiculatus Thunb. - Oriental bittersweet
Celastrus scandens L. - climbing bittersweet
Euonymus europaeus L. - European spindle-tree
Parnassia glauca Raf. - fen grass-of-Parnassus
Uvularia grandiflora Sm. - large-flowered bellwort
Convolvulus arvensis L. - field bindweed
Cornus alternifolia L.f. - pagoda dogwood
Cornus canadensis L. - dwarf cornel
Cornus rugosa Lam. - round-leaved dogwood
Cornus sericea L. - red osier dogwood
Thuja occidentalis L. - northern white-cedar
Carex sp. L. - Sedge
Carex albursina E.Sheld. - white bear sedge
Carex aurea Nutt. - golden-fruited sedge
Carex blanda Dewey - wood sedge
Carex buxbaumii Wahlenb. - Buxbaum's sedge
Carex canescens L. - silvery sedge
Carex cephalophora Muhl. ex Willd. - short-headed bracted sedge
Carex communis var. communis - fibrous-root sedge
Carex comosa Boott - bristly sedge
Carex diandra Schrank - lesser panicled sedge
Carex disperma Dewey - two-seeded bog sedge
Carex formosa Dewey - handsome sedge
Carex gracillima Schwein. - purple-sheathed graceful sedge
Carex granularis Muhl. ex Willd. - limestone meadow sedge
Carex hirtifolia Mack. - pubescent sedge
Carex interior L.H.Bailey - inland star sedge
Carex intumescens Rudge - swollen sedge
Carex lacustris Willd. - rip-gut sedge
Carex laxiculmis Schwein. - weak-stemmed wood sedge
Carex limosa L. - mud sedge
Carex molesta Mack. ex Bright - troublesome sedge
Carex oligocarpa Willd. - rich-woods sedge
Carex pellita Willd. - broad-leaved woolly sedge
Carex pensylvanica Lam. - Pennsylvania sedge
Carex prairea Dewey - prairie sedge
Carex projecta Mack. - necklace sedge
Carex pseudocyperus L. - false bristly sedge
Carex radiata (Wahlenb.) Small - straight-styled wood sedge
Carex retrorsa Schwein. - retrorse sedge
Carex siccata Dewey - running savanna sedge
Carex sparganioides Muhl. ex Willd. - loose-headed bracted sedge
Carex sterilis Willd. - fen star sedge
Carex stricta Lam. - uptight sedge
Carex tenera Dewey - narrow-leaved oval sedge
Carex tenuiflora Wahlenb. - sparse-flowered sedge
Carex trichocarpa Willd. - hairy-fruit sedge
Carex trisperma Dewey - three-seeded sedge
Carex tuckermanii Dewey - Tuckerman's sedge
Carex utriculata Boott - Northwest Territory sedge
Carex woodii Dewey - Wood's stiff sedge
Cyperus bipartitus Torr. - slender flat sedge
Cyperus diandrus Torr. - umbrella flat sedge
Cyperus schweinitzii Torr. - Schweinitz's flat sedge
Eleocharis elliptica Kunth - elliptic spike-rush
Eriophorum virginicum L. - tawny cotton-grass
Rhynchospora alba (L.) Vahl - white beak-rush
Schoenoplectus pungens (Vahl) Palla - common three-square bulrush
Scirpus atrovirens Willd. - dark-green bulrush
Scirpus pendulus Muhl. - rufous bulrush
Drosera rotundifolia L. - round-leaved sundew
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
Shepherdia canadensis (L.) Nutt. - russet buffalo-berry
Equisetum arvense L. - field horsetail
Equisetum fluviatile L. - water horsetail
Equisetum pratense Ehrh. - meadow horsetail
Equisetum scirpoides Michx. - sedge horsetail
Equisetum variegatum subsp. variegatum - variegated scouring rush
Orthilia secunda (L.) House - one-sided wintergreen
Pyrola chlorantha Sw. - green-flowered wintergreen
Vaccinium myrtilloides Michx. - velvet-leaf huckleberry
Euphorbia peplus L. - petty spurge
Desmodium canadense (L.) DC. - showy tick-trefoil
Lathyrus latifolius L. - perennial pea-vine
Medicago lupulina L. - black medick
Melilotus albus Medik. - white sweet-clover
Melilotus officinalis (L.) Lam. - yellow sweet-clover
Trifolium arvense L. - rabbit-foot clover
Trifolium campestre Schreb. - pinnate hop clover
Trifolium hybridum L. - alsike clover
Quercus rubra L. - northern red oak
Gentiana andrewsii var. andrewsii - prairie closed gentian
Gentianopsis crinita (Froel.) Ma - greater fringed gentian
Geranium maculatum L. - Crane's-bill
Ribes americanum Mill. - wild black currant
Ribes cynosbati L. - prickly wild gooseberry
Ribes hirtellum Michx. - swamp gooseberry
Ribes missouriense Nutt. - wild gooseberry
Ribes rubrum L. - garden red currant
Ribes triste Pall. - wild red currant
Myriophyllum verticillatum L. - whorled water-milfoil
Hamamelis virginiana L. - American witch-hazel
Hypericum ascyron L. - great St. John's-wort
Hypericum perforatum L. - St. John's-wort
Triadenum fraseri (Spach) Gleason - Fraser's marsh St. John's-wort
Iris pumila L. - dwarf iris
Sisyrinchium sp. L. - Blue-Eyed-Grass
Sisyrinchium strictum E.P.Bicknell - mountain blue-eyed-grass
Carya ovata var. ovata - shellbark hickory
Juglans cinerea L. - white walnut
Juncus alpinoarticulatus Chaix - northern green rush
Juncus dudleyi Wiegand - Dudley's rush
Juncus nodosus L. - knotted rush
Juncus tenuis Willd. - roadside rush
Triglochin maritima L. - seaside arrow-grass
Triglochin palustris L. - slender bog arrow-grass
Galeopsis tetrahit L. - hemp-nettle
Lycopus uniflorus Michx. - northern water-horehound
Lycopus virginicus L. - Virginia water-horehound
Scutellaria lateriflora L. - mad-dog skullcap
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
Lilium michiganense Farw. - Turk's-cap lily
Lythrum salicaria L. - spiked loosestrife
Althaea officinalis L. - common marsh mallow
Malva moschata L. - musk mallow
Trillium cernuum L. - whip-poor-will flower
Menispermum canadense L. - common moonseed
Menyanthes trifoliata L. - common buckbean
Claytonia virginica L. - Virginia spring-beauty
Nuphar variegata Durand - bull-head pond-lily
Circaea alpina subsp. alpina - small enchanter's-nightshade
Circaea canadensis subsp. canadensis (L.) Hill - broad-leaf enchanter's-nightshade
Epilobium coloratum Biehler - eastern willow-herb
Epilobium leptophyllum Raf. - fen willow-herb
Oenothera biennis L. - common evening-primrose
Oenothera parviflora L. - small-flowered evening-primrose
Arethusa bulbosa L. - swamp-pink
Cypripedium acaule Aiton - small pink lady's-slipper
Cypripedium reginae Walter - showy lady's-slipper
Liparis loeselii (L.) Rich. - Loesel's twayblade
Neottia cordata (L.) Rich. - heart-leaf twayblade
Platanthera clavellata (Michx.) Luer - small green fringed orchid