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Families: 124
Genera: 457
Species: 1050 (species rank)
Total Taxa: 1075 (including subsp. and var.)

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Viburnum acerifolium L. - maple-leaved viburnum
Viburnum lentago L. - sheepberry
Alisma subcordatum Raf. - southern water-plantain
Alisma triviale Pursh - northern water-plantain
Sagittaria brevirostra Mack. & Bush - short-beaked arrow-head
Sagittaria graminea subsp. graminea - grass-leaved sagittaria
Sagittaria rigida Pursh - stiff arrow-head
Amaranthus albus L. - white amaranth
Amaranthus blitoides S.Watson - prostrate pigweed
Amaranthus retroflexus L. - wild-beet amaranth
Chenopodium pratericola Rydb. - narrow-leaf goosefoot
Chenopodium simplex (Torr.) Raf. - maple-leaved goosefoot
Froelichia floridana (Nutt.) Moq. - plains snake-cotton
Salsola tragus L. - tumbleweed
Rhus copallinum L. - shining sumac
Rhus glabra L. - smooth sumac
Angelica atropurpurea L. - purple-stem angelica
Cicuta bulbifera L. - bulblet water-hemlock
Cicuta maculata L. - spotted water-hemlock
Daucus carota L. - wild carrot
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
Asclepias exaltata L. - tall milkweed
Asclepias lanuginosa Nutt. - woolly milkweed
Asclepias ovalifolia Decne. - oval-leaved milkweed
Asclepias tuberosa - orange milkweed
Asclepias verticillata L. - whorled milkweed
Asclepias viridiflora Raf. - short green milkweed
Ilex verticillata (L.) A.Gray - common winterberry
Calla palustris L. - wild calla
Lemna sp. L. - Duckweed
Lemna trisulca L. - star duckweed
Lemna turionifera Landolt - Turion duckweed
Aralia hispida Vent. - bristly sarsaparilla
Aralia nudicaulis L. - wild sarsaparilla
Hydrocotyle americana L. - marsh pennywort
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
Ambrosia psilostachya DC. - western ragweed
Antennaria neglecta Greene - field 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
Cirsium muticum Michx. - swamp thistle
Coreopsis palmata Nutt. - stiff tickseed
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
Euthamia gymnospermoides Greene - viscid grass-leaved goldenrod
Eutrochium maculatum L. - spotted Joe-Pye-weed
Gnaphalium uliginosum L. - marsh cudweed
Hasteola suaveolens (L.) Pojark. - sweet Indian-plantain
Helenium autumnale L. - common sneezeweed
Helenium flexuosum Raf. - southern sneezeweed
Helianthus annuus L. - garden sunflower
Helianthus giganteus L. - tall sunflower
Helianthus strumosus L. - rough-leaved sunflower
Helianthus tuberosus L. - woodland sunflower
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
Liatris aspera Michx. - rough gayfeather
Liatris cylindracea Michx. - barellhead gayfeather
Packera aurea (L.) A.Löve & D.Löve - heart-leaved groundsel
Prenanthes alba L. - white rattlesnakeroot
Rudbeckia laciniata L. - wild golden-glow
Solidago canadensis L. - common goldenrod
Solidago flexicaulis L. - zigzag goldenrod
Solidago gigantea Aiton - smooth goldenrod
Solidago juncea Aiton - early goldenrod
Solidago missouriensis Nutt. - Missouri goldenrod
Solidago nemoralis Aiton - old-field goldenrod
Solidago sciaphila E.S.Steele - shadowy goldenrod
Solidago speciosa Nutt. - showy goldenrod
Solidago uliginosa Nutt. - northern bog goldenrod
Symphyotrichum racemosum (Elliott) G.L.Nesom - smooth white oldfield aster
Tragopogon dubius Scop. - yellow salsify
Tragopogon porrifolius L. - vegetable-oyster
Vernonia fasciculata Michx. - smooth ironweed
Xanthium strumarium L. - rough cocklebur
Impatiens capensis Meerb. - spotted touch-me-not
Podophyllum peltatum L. - wild mandrake
Betula cordifolia Regel - mountain white birch
Betula nigra L. - river birch
Betula pumila L. - swamp birch
Betula x sandbergii Britton - Sandberg's birch
Corylus americana Walter - American hazelnut
Hydrophyllum virginianum L. - Virginia waterleaf
Lithospermum incisum Lehm. - narrow-leaved puccoon
Myosotis laxa Lehm. - small forget-me-not
Myosotis scorpioides L. - water scorpion-grass
Myosotis verna Nutt. - white forget-me-not
Berteroa incana (L.) DC. - hoary-alyssum
Boechera stricta (Graham) Al-Shehbaz - Drummond's rock-cress
Cardamine parviflora L. - small-flowered bitter-cress
Cardamine pensylvanica Muhl. ex Willd. - Pennsylvania bitter-cress
Erysimum cheiranthoides L. - worm-seed wallflower
Lepidium densiflorum Schrad. - small peppergrass
Sinapis arvensis L. - charlock mustard
Thlaspi arvense L. - field pennycress
Turritis glabra L. - tower rock-cress
Campanula aparinoides Pursh - marsh bellflower
Lobelia sp. L. - Lobelia
Lobelia inflata L. - Indian-tobacco
Lobelia siphilitica L. - great blue lobelia
Triodanis perfoliata (L.) Nieuwl. - round-leaved triodanis
Cannabis sativa L. - marijuana
Diervilla lonicera Mill. - northern bush-honeysuckle
Lonicera tatarica L. - Tartarian honeysuckle
Lonicera X bella Zabel - white-bell honeysuckle
Atocion armeria (L.) Raf. - sweet-William silene
Paronychia canadensis (L.) A.W.Wood - smooth-forked nailwort
Scleranthus perennis - perennial knawel
Silene antirrhina L. - sleepy silene
Silene csereii Baumg. - glaucous campion
Silene latifolia Poir. - white cockle
Spergula arvensis L. - corn spurry
Stellaria longifolia Muhl. ex Willd. - long-leaved stitchwort
Celastrus scandens L. - climbing bittersweet
Crocanthemum canadense (L.) Britton - long-branch frostweed
Lechea tenuifolia Michx. - slender-leaved pinweed
Uvularia grandiflora Sm. - large-flowered bellwort
Tradescantia sp. - Spiderwort
Tradescantia ohiensis Raf. - smooth spiderwort
Calystegia sepium (L.) R.Br. - hedge false bindweed
Cuscuta cephalanthi Engelm. - buttonbush dodder
Cuscuta coryli Engelm. - hazel dodder
Cuscuta pentagona Engelm. - five-angled dodder
Cuscuta polygonorum Engelm. - smartweed dodder
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 adusta Boott - lesser brown sedge
Carex albursina E.Sheld. - white bear sedge
Carex aurea Nutt. - golden-fruited sedge
Carex backii W.Boott - Rocky Mountain sedge
Carex bicknellii Britton - Bicknell's sedge
Carex brevior (Dewey) Mack. - plains oval sedge
Carex buxbaumii Wahlenb. - Buxbaum's sedge
Carex communis var. communis - fibrous-root sedge
Carex comosa Boott - bristly sedge
Carex foenea Willd. - bronze-headed oval sedge
Carex folliculata L. - northern long sedge
Carex gracillima Schwein. - purple-sheathed graceful sedge
Carex haydenii Dewey - long-scaled tussock 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 laeviconica Dewey - smooth-cone sedge
Carex laxiculmis var. laxiculmis - weak-stemmed wood sedge
Carex lurida Wahlenb. - shallow sedge
Carex oligosperma Michx. - few-seeded sedge
Carex pellita Willd. - broad-leaved woolly sedge
Carex pensylvanica Lam. - Pennsylvania sedge
Carex prasina Wahlenb. - leek-green sedge
Carex projecta Mack. - necklace sedge
Carex radiata (Wahlenb.) Small - straight-styled wood sedge
Carex retrorsa Schwein. - retrorse sedge
Carex scabrata Schwein. - eastern rough sedge
Carex scoparia var. scoparia - lance-fruited oval sedge
Carex siccata Dewey - running savanna sedge
Carex sparganioides Muhl. ex Willd. - loose-headed bracted sedge
Carex spicata Huds. - spiked bracted sedge
Carex sterilis Willd. - fen star sedge
Carex stricta Lam. - uptight sedge
Carex tenera Dewey - narrow-leaved oval sedge
Carex tonsa var. rugosperma (Mack.) Crins - wrinkled-seeded oak sedge
Carex tonsa var. tonsa - smooth-fruited oak sedge
Carex trichocarpa Willd. - hairy-fruit sedge
Carex trisperma Dewey - three-seeded sedge
Carex tuckermanii Dewey - Tuckerman's sedge
Carex typhina Michx. - cat-tail sedge
Carex utriculata Boott - Northwest Territory sedge
Carex vesicaria L. - tufted lake sedge
Cyperus sp. L. - Flat Sedge
Cyperus bipartitus Torr. - slender flat sedge
Cyperus erythrorhizos Muhl. - red-rooted sedge
Cyperus houghtonii Torr. - Houghton's flat sedge
Cyperus schweinitzii Torr. - Schweinitz's flat sedge
Cyperus squarrosus L. - bearded flat sedge
Cyperus strigosus L. - straw-colored cyperus
Cyperus X mesochorus Geise - midland sand sedge
Eleocharis elliptica Kunth - elliptic spike-rush
Eriophorum virginicum L. - tawny cotton-grass
Lipocarpha drummondii (Nees) G.C.Tucker - Drummond's half-chaff sedge
Lipocarpha micrantha (Vahl) G.C.Tucker - small-flowered hemicarpha
Rhynchospora alba (L.) Vahl - white beak-rush
Schoenoplectus pungens (Vahl) Palla - common three-square bulrush
Schoenoplectus torreyi (Olney) Palla - Torrey's three-square bulrush
Scirpus atrocinctus Fernald - black-girdled wool-grass
Scirpus atrovirens Willd. - dark-green bulrush
Scirpus hattorianus Makino - mosquito bulrush
Scirpus pedicellatus Fernald - stalked wool-grass
Scirpus pendulus Muhl. - rufous bulrush
Drosera intermedia Hayne - spoon-leaf sundew
Drosera rotundifolia L. - round-leaved sundew
Cystopteris tennesseensis Shaver - Tennessee bladder fern
Cystopteris tenuis (Michx.) Desv. - upland brittle bladder fern
Dryopteris fragrans (L.) Schott - fragrant wood fern
Onoclea sensibilis L. - sensitive fern
Woodsia obtusa subsp. obtusa - blunt-lobed woodsia
Shepherdia argentea (Pursh) Nutt. - silver buffalo-berry
Equisetum arvense L. - field horsetail
Equisetum laevigatum A.Braun - smooth scouring rush
Equisetum pratense Ehrh. - meadow horsetail
Equisetum sylvaticum L. - woodland horsetail
Epigaea repens L. - trailing-arbutus
Monotropa uniflora L. - Indian-pipe
Pyrola elliptica Nutt. - wax-flower shin-leaf
Vaccinium angustifolium Aiton - low sweet blueberry
Vaccinium macrocarpon Aiton - large cranberry
Vaccinium oxycoccos L. - small cranberry
Euphorbia corollata L. - flowering spurge
Euphorbia cyparissias L. - graveyard spurge
Euphorbia geyeri Engelm. - Geyer's spurge
Euphorbia glyptosperma Engelm. - ridge-seeded spurge
Euphorbia nutans Lag. - nodding spurge
Baptisia lactea (Raf.) Thieret - white wild indigo
Baptisia leucophaea Nutt. - plains wild indigo
Crotalaria sagittalis L. - arrow-headed rattle-box
Dalea candida var. candida - white prairie-clover
Dalea purpurea var. purpurea - violet prairie-clover
Desmodium canadense (L.) DC. - showy tick-trefoil
Desmodium illinoense A.Gray - prairie tick-trefoil
Lathyrus palustris L. - slender-stem pea-vine
Lespedeza capitata Michx. - round-headed lespedeza
Lotus corniculatus L. - bird's-foot trefoil
Lupinus perennis L. - wild 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
Tephrosia virginiana (L.) Pers. - Virginia tephrosia
Trifolium arvense L. - rabbit-foot clover
Trifolium aureum Pollich - yellow hop clover
Trifolium dubium Sibth. - suckling clover
Trifolium hybridum L. - alsike clover
Trifolium repens L. - white clover
Vicia villosa Roth - winter vetch