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Families: 124
Genera: 468
Species: 1040 (species rank)
Total Taxa: 1061 (including subsp. and var.)

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Viburnum acerifolium L. - maple-leaved viburnum
Viburnum lantana L. - wayfaring-tree
Viburnum lentago L. - sheepberry
Alisma subcordatum Raf. - southern water-plantain
Alisma triviale Pursh - northern water-plantain
Sagittaria rigida Pursh - stiff arrow-head
Amaranthus albus L. - white amaranth
Amaranthus blitoides S.Watson - prostrate pigweed
Atriplex patula L. - spear saltbush
Chenopodium simplex (Torr.) Raf. - maple-leaved goosefoot
Froelichia floridana (Nutt.) Moq. - plains snake-cotton
Salsola collina Pall. - slender Russian thistle
Allium cernuum Roth - nodding wild onion
Rhus copallinum L. - shining sumac
Rhus glabra L. - smooth sumac
Carum carvi L. - caraway
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
Polytaenia nuttallii DC. - prairie-parsley
Sanicula canadensis L. - Canadian sanicle
Sanicula marilandica L. - Maryland sanicle
Apocynum androsaemifolium L. - spreading dogbane
Asclepias exaltata L. - tall milkweed
Asclepias lanuginosa Nutt. - woolly milkweed
Asclepias ovalifolia Decne. - oval-leaved 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 minor L. - small duckweed
Lemna perpusilla Torr. - minute duckweed
Lemna trisulca L. - star duckweed
Lemna turionifera Landolt - Turion duckweed
Wolffia columbiana H.Karst. - common water-meal
Aralia hispida Vent. - bristly sarsaparilla
Aralia nudicaulis L. - wild sarsaparilla
Aralia racemosa L. - life-of-man
Hydrocotyle americana L. - marsh pennywort
Panax trifolius L. - groundnut
Asarum canadense L. - wild-ginger
Asparagus officinalis L. - garden asparagus
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
Ambrosia trifida L. - horse-cane
Antennaria neglecta Greene - field pussy-toes
Anthemis cotula L. - stinking-cotula
Arctium lappa L. - great burdock
Artemisia dracunculus L. - false tarragon
Artemisia frigida Willd. - prairie sage-wort
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
Cirsium muticum Michx. - swamp thistle
Coreopsis lanceolata L. - sand tickseed
Coreopsis palmata Nutt. - stiff tickseed
Coreopsis tinctoria Nutt. - plains tickseed
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 macrophylla (L.) Cass. - large-leaved aster
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
Helenium autumnale L. - common sneezeweed
Helianthus sp. L. - Sunflower
Helianthus annuus L. - garden sunflower
Helianthus giganteus L. - tall sunflower
Helianthus hirsutus Raf. - rough sunflower
Helianthus mollis Lam. - soft 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 scabrum Michx. - sticky hawkweed
Hieracium umbellatum L. - northern hawkweed
Inula helenium L. - elecampane
Krigia biflora (Walter) S.F.Blake - orange dwarf-dandelion
Krigia virginica (L.) Willd. - Virginia dwarf-dandelion
Lactuca sp. L. - Lettuce
Lactuca canadensis L. - wild lettuce
Lactuca serriola L. - prickly lettuce
Liatris aspera Michx. - rough gayfeather
Liatris cylindracea Michx. - barellhead gayfeather
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
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 rigida L. - stiff goldenrod
Solidago sciaphila E.S.Steele - shadowy goldenrod
Solidago speciosa Nutt. - showy goldenrod
Solidago uliginosa Nutt. - northern bog goldenrod
Sonchus asper (L.) Hill - spiny-leaf sow-thistle
Tragopogon dubius Scop. - yellow salsify
Vernonia fasciculata Michx. - smooth ironweed
Impatiens capensis Meerb. - spotted touch-me-not
Impatiens pallida Nutt. - yellow touch-me-not
Berberis thunbergii DC. - Japanese 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
Hydrophyllum virginianum L. - Virginia waterleaf
Myosotis scorpioides L. - water scorpion-grass
Berteroa incana (L.) DC. - hoary-alyssum
Cardamine pensylvanica Muhl. ex Willd. - Pennsylvania bitter-cress
Erysimum cheiranthoides L. - worm-seed wallflower
Hesperis matronalis L. - dame's rocket
Lepidium densiflorum Schrad. - small peppergrass
Sinapis arvensis L. - charlock mustard
Sisymbrium altissimum L. - tall tumble mustard
Thlaspi arvense L. - field pennycress
Turritis glabra L. - tower rock-cress
Opuntia sp. Mill. - Prickly Pear
Opuntia fragilis (Nutt.) Haw. - little prickly-pear
Opuntia macrorhiza Engelm. - twist-spine prickly-pear
Campanula aparinoides Pursh - marsh bellflower
Campanula rapunculoides L. - rover bellflower
Lobelia inflata L. - Indian-tobacco
Triodanis perfoliata (L.) Nieuwl. - round-leaved triodanis
Celtis occidentalis L. - northern hackberry
Diervilla lonicera Mill. - northern bush-honeysuckle
Dipsacus fullonum - wild 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
Agrostemma githago - corn cockle
Arenaria serpyllifolia - thyme-leaved sandwort
Cerastium nutans - nodding mouse-ear chickweed
Dianthus armeria - Deptford pink
Scleranthus perennis - perennial knawel
Silene antirrhina L. - sleepy silene
Silene csereii Baumg. - glaucous campion
Silene dichotoma - forked catchfly
Silene latifolia Poir. - white cockle
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
Commelina communis L. - common dayflower
Tradescantia ohiensis Raf. - smooth spiderwort
Calystegia sepium (L.) R.Br. - hedge false bindweed
Convolvulus arvensis L. - field bindweed
Cuscuta cephalanthi Engelm. - buttonbush dodder
Ipomoea purpurea (L.) Roth - tall morning-glory
Cornus canadensis L. - dwarf cornel
Cornus rugosa Lam. - round-leaved dogwood
Cornus sericea L. - red osier dogwood
Thuja occidentalis L. - northern white-cedar
Carex backii W.Boott - Rocky Mountain sedge
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 careyana Torr. ex Dewey - Carey's wood sedge
Carex comosa Boott - bristly sedge
Carex crawfordii Fernald - Crawford's sedge
Carex foenea Willd. - bronze-headed oval sedge
Carex folliculata L. - northern long sedge
Carex gracillima Schwein. - purple-sheathed graceful sedge
Carex gravida L.H.Bailey - long-awned bracted sedge
Carex gynandra Schwein. - nodding sedge
Carex haydenii Dewey - long-scaled tussock sedge
Carex interior L.H.Bailey - inland star sedge
Carex intumescens Rudge - swollen sedge
Carex jamesii Schwein. - James' sedge
Carex lacustris Willd. - rip-gut sedge
Carex leptonervia (Fernald) Fernald - nerveless woodland sedge
Carex limosa L. - mud sedge
Carex lurida Wahlenb. - shallow sedge
Carex meadii Dewey - Mead's stiff 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 scoparia var. scoparia - lance-fruited oval sedge
Carex siccata Dewey - running savanna sedge
Carex sparganioides Muhl. ex Willd. - loose-headed bracted 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 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 strigosus L. - straw-colored cyperus
Eleocharis elliptica Kunth - elliptic 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 atrocinctus Fernald - black-girdled wool-grass
Scirpus atrovirens Willd. - dark-green bulrush
Scirpus hattorianus Makino - mosquito bulrush
Scirpus pedicellatus Fernald - stalked wool-grass
Drosera intermedia Hayne - spoon-leaf sundew
Drosera rotundifolia L. - round-leaved sundew
Cystopteris bulbifera (L.) Bernh. - bulblet fragile fern
Cystopteris x illinoensis R.C.Moran - Illinois bladder fern
Onoclea sensibilis L. - sensitive fern
Woodsia obtusa subsp. obtusa - blunt-lobed woodsia
Equisetum arvense L. - field horsetail
Equisetum fluviatile L. - water horsetail
Equisetum laevigatum A.Braun - smooth scouring rush
Equisetum scirpoides Michx. - sedge horsetail
Equisetum sylvaticum L. - woodland horsetail
Epigaea repens L. - trailing-arbutus
Monotropa uniflora L. - Indian-pipe
Pyrola sp. L. - Shinleaf
Pyrola elliptica Nutt. - wax-flower shin-leaf
Vaccinium angustifolium Aiton - low sweet blueberry
Vaccinium macrocarpon Aiton - large cranberry
Vaccinium oxycoccos L. - small cranberry
Vaccinium pallidum Aiton - late low-bush blueberry
Euphorbia corollata L. - flowering spurge
Euphorbia cyparissias L. - graveyard spurge
Euphorbia davidii Subils - David'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
Caragana arborescens Lam. - Siberian pea-shrub
Crotalaria sagittalis L. - arrow-headed rattle-box
Dalea candida Michx. ex Willd. - slender white prairie-clover
Dalea candida var. candida - white prairie-clover
Dalea purpurea var. purpurea - violet prairie-clover
Desmodium canadense (L.) DC. - showy 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