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Families: 121
Genera: 469
Species: 1039 (species rank)
Total Taxa: 1048 (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 prunifolium L. - smooth black-haw
Viburnum trilobum Marshall - high-bush cranberry
Alisma subcordatum Raf. - southern water-plantain
Alisma triviale Pursh - northern water-plantain
Sagittaria sp. L. - Arrowhead
Sagittaria cristata Engelm. - crested arrow-head
Amaranthus blitoides S.Watson - prostrate pigweed
Amaranthus hybridus L. - smooth pigweed
Amaranthus retroflexus L. - wild-beet amaranth
Atriplex patula L. - spear saltbush
Chenopodium glaucum var. glaucum - oak-leaved goosefoot
Chenopodium simplex (Torr.) Raf. - maple-leaved goosefoot
Corispermum pallasii Steven - Siberian bugseed
Salsola tragus L. - tumbleweed
Allium cernuum Roth - nodding wild onion
Rhus glabra L. - smooth sumac
Rhus typhina L. - staghorn sumac
Angelica atropurpurea L. - purple-stem angelica
Carum carvi L. - caraway
Cicuta bulbifera L. - bulblet water-hemlock
Cicuta maculata L. - spotted water-hemlock
Daucus carota L. - wild carrot
Eryngium yuccifolium Michx. - rattlesnake-master
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
Sium suave Walter - water-parsnip
Zizia aptera (A.Gray) Fernald - heart-leaved meadow-parsnip
Apocynum androsaemifolium L. - spreading dogbane
Asclepias exaltata L. - tall milkweed
Asclepias lanuginosa Nutt. - woolly milkweed
Asclepias verticillata L. - whorled milkweed
Asclepias viridiflora Raf. - short green milkweed
Vinca minor L. - running-myrtle
Lemna minor L. - small duckweed
Lemna trisulca L. - star duckweed
Lemna turionifera Landolt - Turion duckweed
Wolffia columbiana H.Karst. - common water-meal
Aralia nudicaulis L. - wild sarsaparilla
Aralia racemosa L. - life-of-man
Asarum canadense L. - wild-ginger
Asparagus officinalis L. - garden asparagus
Maianthemum canadense Desf. - wild lily-of-the-valley
Maianthemum stellatum (L.) Link - starry false Solomon's-seal
Ambrosia trifida L. - horse-cane
Antennaria neglecta Greene - field pussy-toes
Anthemis cotula L. - stinking-cotula
Arctium lappa L. - great burdock
Arnoglossum plantagineum Raf. - prairie Indian-plantain
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 vulgata Greene - tall beggar-ticks
Carduus nutans L. - nodding thistle
Centaurea cyanus L. - cornflower
Cirsium muticum Michx. - swamp thistle
Coreopsis lanceolata L. - sand tickseed
Coreopsis palmata Nutt. - stiff tickseed
Coreopsis tinctoria Nutt. - plains tickseed
Crepis capillaris (L.) Wallr. - smooth hawk's-beard
Crepis tectorum L. - narrow-leaved hawk's-beard
Doellingeria umbellata (Mill.) Nees - tall flat-topped white aster
Erigeron annuus (L.) Pers. - eastern daisy fleabane
Eupatorium altissimum L. - tall thoroughwort
Eurybia furcata (E.S.Burgess) G.L.Nesom - midwestern white heart-leaved aster
Euthamia graminifolia (L.) Nutt. - grass-leaved goldenrod
Euthamia gymnospermoides Greene - viscid grass-leaved goldenrod
Eutrochium maculatum L. - spotted Joe-Pye-weed
Helenium autumnale L. - common sneezeweed
Helianthus annuus L. - garden sunflower
Helianthus decapetalus L. - thin-leaved sunflower
Helianthus giganteus L. - tall sunflower
Helianthus hirsutus Raf. - rough sunflower
Helianthus strumosus L. - rough-leaved sunflower
Helianthus tuberosus L. - woodland sunflower
Heliopsis helianthoides (L.) Sweet - sunflower-everlasting
Hieracium caespitosum Dumort. - yellow king-devil
Hieracium umbellatum L. - northern hawkweed
Krigia biflora (Walter) S.F.Blake - orange dwarf-dandelion
Lactuca canadensis L. - wild lettuce
Lactuca serriola L. - prickly lettuce
Lapsana communis L. - nipplewort
Liatris aspera Michx. - rough gayfeather
Liatris cylindracea Michx. - barellhead gayfeather
Liatris pycnostachya (L.) Willd. - thick-spike gay-feather
Liatris spicata var. spicata - sessile-headed blazing-star
Packera aurea (L.) A.Löve & D.Löve - heart-leaved groundsel
Prenanthes alba L. - white rattlesnakeroot
Prenanthes racemosa Michx. - purple rattlesnake-root
Ratibida pinnata (Vent.) Barnhart - pinnate prairie coneflower
Rudbeckia triloba var. triloba - three-lobed coneflower
Senecio vulgaris L. - common groundsel
Silphium integrifolium Michx. - whole-leaf rosinweed
Silphium laciniatum L. - compass-plant
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 missouriensis Nutt. - Missouri goldenrod
Solidago nemoralis Aiton - old-field goldenrod
Solidago riddellii Frank - Riddell's goldenrod
Solidago rigida L. - stiff goldenrod
Solidago speciosa Nutt. - showy goldenrod
Solidago uliginosa Nutt. - northern bog goldenrod
Solidago X bernardii B.Boivin - yellow stiff aster
Sonchus sp. L. - Sow-Thistle
Sonchus 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
Vernonia fasciculata Michx. - smooth ironweed
Xanthium strumarium L. - rough cocklebur
Impatiens capensis Meerb. - spotted touch-me-not
Impatiens glandulifera Royle - ornamental jewelweed
Impatiens pallida Nutt. - yellow touch-me-not
Berberis thunbergii DC. - Japanese barberry
Podophyllum peltatum L. - wild mandrake
Betula pumila L. - swamp birch
Corylus americana Walter - American hazelnut
Echium vulgare L. - viper's-bugloss
Lithospermum incisum Lehm. - narrow-leaved puccoon
Myosotis scorpioides L. - water scorpion-grass
Symphytum officinale L. - common comfrey
Berteroa incana (L.) DC. - hoary-alyssum
Brassica sp. L. - Mustard
Cakile edentula (Bigelow) Hook. - American sea-rocket
Camelina microcarpa Andrz. ex DC. - small-fruited false flax
Cardamine pensylvanica Muhl. ex Willd. - Pennsylvania bitter-cress
Diplotaxis muralis (L.) DC. - stinking wall-rocket
Draba reptans (Lam.) Fernald - common whitlow-grass
Draba verna L. - vernal whitlow-grass
Erysimum cheiranthoides L. - worm-seed wallflower
Hesperis matronalis L. - dame's rocket
Lepidium densiflorum Schrad. - small peppergrass
Rorippa sylvestris (L.) Besser - creeping yellow-cress
Sinapis alba L. - white mustard
Sinapis arvensis L. - charlock mustard
Sisymbrium altissimum L. - tall tumble mustard
Thlaspi arvense L. - field pennycress
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
Lobelia spicata Lam. - spiked lobelia
Cannabis sativa L. - marijuana
Celtis occidentalis L. - northern hackberry
Dipsacus laciniatus L. - cut-leaved teasel
Lonicera dioica L. - red honeysuckle
Lonicera morrowii A.Gray - Morrow's honeysuckle
Lonicera reticulata Raf. - yellow honeysuckle
Lonicera tatarica L. - Tartarian honeysuckle
Lonicera X bella Zabel - white-bell honeysuckle
Lonicera X minutiflora Zabel - small-flower honeysuckle
Lonicera xylosteum L. - European fly honeysuckle
Triosteum aurantiacum E.P.Bicknell - orange-fruit horse-gentian
Arenaria serpyllifolia - thyme-leaved sandwort
Atocion armeria (L.) Raf. - sweet-William silene
Cerastium semidecandrum L. - five-stamen mouse-ear chickweed
Dianthus armeria - Deptford pink
Holosteum umbellatum - jagged chickweed
Paronychia canadensis (L.) A.W.Wood - smooth-forked nailwort
Silene antirrhina L. - sleepy silene
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 scandens L. - climbing bittersweet
Euonymus alatus (Thunb.) Siebold - winged spindle-tree
Euonymus europaeus L. - European spindle-tree
Parnassia glauca Raf. - fen grass-of-Parnassus
Crocanthemum canadense (L.) Britton - long-branch frostweed
Polanisia dodecandra (L.) DC. - rough-seed clammy-weed
Uvularia grandiflora Sm. - large-flowered bellwort
Commelina communis L. - common dayflower
Tradescantia ohiensis Raf. - smooth spiderwort
Calystegia sepium (L.) R.Br. - hedge false bindweed
Convolvulus arvensis L. - field bindweed
Cuscuta coryli Engelm. - hazel dodder
Cuscuta polygonorum Engelm. - smartweed dodder
Ipomoea purpurea (L.) Roth - tall morning-glory
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 bicknellii Britton - Bicknell's sedge
Carex blanda Dewey - wood sedge
Carex brevior (Dewey) Mack. - plains oval sedge
Carex buxbaumii Wahlenb. - Buxbaum's sedge
Carex comosa Boott - bristly sedge
Carex diandra Schrank - lesser panicled sedge
Carex flava L. - yellow sedge
Carex granularis Muhl. ex Willd. - limestone meadow sedge
Carex gravida L.H.Bailey - long-awned bracted sedge
Carex grayi J.Carey - Gray's sedge
Carex haydenii Dewey - long-scaled tussock sedge
Carex hirtifolia Mack. - pubescent sedge
Carex lacustris Willd. - rip-gut sedge
Carex meadii Dewey - Mead's stiff sedge
Carex molesta Mack. ex Bright - troublesome sedge
Carex normalis Mack. - spreading oval sedge
Carex pellita Willd. - broad-leaved woolly sedge
Carex pensylvanica Lam. - Pennsylvania sedge
Carex prairea Dewey - prairie sedge
Carex radiata (Wahlenb.) Small - straight-styled wood sedge
Carex retrorsa Schwein. - retrorse sedge
Carex sartwellii Dewey - Sartwell's 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 suberecta (Olney) Britton - wedge-fruited oval sedge
Carex tenera Dewey - narrow-leaved oval sedge
Carex trichocarpa Willd. - hairy-fruit sedge
Carex trisperma Dewey - three-seeded sedge
Carex utriculata Boott - Northwest Territory sedge
Carex vesicaria L. - tufted lake sedge
Carex viridula - little green sedge
Cyperus bipartitus Torr. - slender flat sedge
Cyperus diandrus Torr. - umbrella flat sedge
Cyperus erythrorhizos Muhl. - red-rooted sedge
Cyperus odoratus L. - rusty 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 compressa var. compressa - flat-stemmed spike-rush
Eleocharis elliptica Kunth - elliptic spike-rush
Eleocharis intermedia Schult. - matted spike-rush
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
Scirpus atrovirens Willd. - dark-green bulrush
Scirpus pendulus Muhl. - rufous bulrush
Drosera rotundifolia L. - round-leaved sundew
Cystopteris fragilis (L.) Bernh. - northern fragile fern
Cystopteris tenuis (Michx.) Desv. - upland brittle bladder fern
Onoclea sensibilis L. - sensitive fern
Equisetum sp. L. - Scouring-Rush
Equisetum arvense L. - field horsetail
Equisetum fluviatile L. - water horsetail
Equisetum laevigatum A.Braun - smooth scouring rush
Monotropa uniflora L. - Indian-pipe
Pyrola elliptica Nutt. - wax-flower shin-leaf
Vaccinium angustifolium Aiton - low sweet blueberry
Vaccinium oxycoccos L. - small cranberry
Euphorbia corollata L. - flowering spurge
Euphorbia cyparissias L. - graveyard spurge
Euphorbia dentata Michx. - toothed spurge
Euphorbia glyptosperma Engelm. - ridge-seeded spurge
Euphorbia marginata Pursh - snow-on-the-mountain
Euphorbia nutans Lag. - nodding spurge
Baptisia lactea (Raf.) Thieret - white wild indigo
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
Desmodium illinoense A.Gray - prairie tick-trefoil