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Families: 115
Genera: 371
Species: 723 (species rank)
Total Taxa: 735 (including subsp. and var.)

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Acorus calamus L. - sweet-flag
Viburnum lentago L. - sheepberry
Sagittaria cristata Engelm. - crested arrow-head
Sagittaria rigida Pursh - stiff arrow-head
Amaranthus albus L. - white amaranth
Amaranthus retroflexus L. - wild-beet amaranth
Chenopodium simplex (Torr.) Raf. - maple-leaved goosefoot
Salsola tragus L. - tumbleweed
Rhus copallinum L. - shining sumac
Rhus glabra L. - smooth sumac
Rhus typhina L. - staghorn sumac
Cicuta bulbifera L. - bulblet water-hemlock
Daucus carota L. - wild carrot
Heracleum maximum W.Bartram - American cow-parsnip
Pastinaca sativa L. - wild parsnip
Polytaenia nuttallii DC. - prairie-parsley
Sanicula marilandica L. - Maryland sanicle
Zizia aptera (A.Gray) Fernald - heart-leaved meadow-parsnip
Apocynum androsaemifolium L. - spreading dogbane
Asclepias exaltata L. - tall milkweed
Asclepias verticillata L. - whorled milkweed
Vinca minor L. - running-myrtle
Lemna minor L. - small duckweed
Lemna trisulca L. - star duckweed
Lemna turionifera Landolt - Turion duckweed
Wolffia brasiliensis Wedd. - Brazilian water-meal
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
Antennaria neglecta Greene - field pussy-toes
Anthemis cotula L. - stinking-cotula
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
Conyza ramosissima Cronquist - spreading fleabane
Coreopsis palmata Nutt. - stiff tickseed
Doellingeria umbellata (Mill.) Nees - tall flat-topped white aster
Echinacea purpurea (L.) Moench - eastern purple coneflower
Erigeron annuus (L.) Pers. - eastern daisy fleabane
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 sp. L. - Sunflower
Helianthus annuus L. - garden sunflower
Helianthus giganteus L. - tall sunflower
Helianthus hirsutus Raf. - rough sunflower
Helianthus strumosus L. - rough-leaved sunflower
Heliopsis helianthoides (L.) Sweet - sunflower-everlasting
Hieracium scabrum Michx. - sticky hawkweed
Hieracium umbellatum L. - northern hawkweed
Krigia biflora (Walter) S.F.Blake - orange dwarf-dandelion
Krigia virginica (L.) Willd. - Virginia dwarf-dandelion
Lactuca canadensis L. - wild lettuce
Lactuca serriola L. - prickly lettuce
Liatris aspera Michx. - rough gayfeather
Prenanthes alba L. - white rattlesnakeroot
Prenanthes racemosa Michx. - purple rattlesnake-root
Ratibida pinnata (Vent.) Barnhart - pinnate prairie coneflower
Rudbeckia laciniata L. - wild golden-glow
Solidago canadensis L. - common goldenrod
Solidago gigantea Aiton - smooth goldenrod
Solidago juncea Aiton - early goldenrod
Solidago riddellii Frank - Riddell's goldenrod
Solidago rigida L. - stiff goldenrod
Solidago speciosa Nutt. - showy goldenrod
Solidago uliginosa Nutt. - northern bog goldenrod
Sonchus arvensis subsp. arvensis L. - perennial sow-thistle
Sonchus asper (L.) Hill - spiny-leaf sow-thistle
Tragopogon dubius Scop. - yellow salsify
Vernonia fasciculata Michx. - smooth ironweed
Xanthium strumarium L. - rough cocklebur
Impatiens capensis Meerb. - spotted touch-me-not
Podophyllum peltatum L. - wild mandrake
Corylus americana Walter - American hazelnut
Hydrophyllum virginianum L. - Virginia waterleaf
Lithospermum incisum Lehm. - narrow-leaved puccoon
Myosotis verna Nutt. - white forget-me-not
Berteroa incana (L.) DC. - hoary-alyssum
Cardamine douglassii Britton - purple spring-cress
Cardamine pensylvanica Muhl. ex Willd. - Pennsylvania bitter-cress
Draba reptans (Lam.) Fernald - common whitlow-grass
Erysimum cheiranthoides L. - worm-seed wallflower
Lepidium densiflorum Schrad. - small peppergrass
Rorippa sylvestris (L.) Besser - creeping yellow-cress
Sinapis arvensis L. - charlock mustard
Sisymbrium altissimum L. - tall tumble mustard
Thlaspi arvense L. - field pennycress
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
Lobelia kalmii L. - Ontario lobelia
Lobelia siphilitica L. - great blue lobelia
Lobelia spicata Lam. - spiked lobelia
Triodanis perfoliata (L.) Nieuwl. - round-leaved triodanis
Cannabis sativa L. - marijuana
Lonicera morrowii A.Gray - Morrow's honeysuckle
Lonicera tatarica L. - Tartarian honeysuckle
Lonicera X bella Zabel - white-bell honeysuckle
Cerastium arvense L. - field mouse-ear chickweed
Silene antirrhina L. - sleepy silene
Silene csereii Baumg. - glaucous campion
Silene latifolia Poir. - white cockle
Stellaria media (L.) Vill. - common chickweed
Celastrus orbiculatus Thunb. - Oriental bittersweet
Celastrus scandens L. - climbing bittersweet
Parnassia glauca Raf. - fen grass-of-Parnassus
Crocanthemum canadense (L.) Britton - long-branch frostweed
Lechea tenuifolia Michx. - slender-leaved pinweed
Uvularia grandiflora Sm. - large-flowered bellwort
Tradescantia ohiensis Raf. - smooth spiderwort
Calystegia sepium (L.) R.Br. - hedge false bindweed
Convolvulus arvensis L. - field bindweed
Cuscuta cephalanthi Engelm. - buttonbush dodder
Cuscuta polygonorum Engelm. - smartweed dodder
Ipomoea purpurea (L.) Roth - tall morning-glory
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 crawfordii Fernald - Crawford's sedge
Carex cryptolepis Mack. - small yellow sedge
Carex disperma Dewey - two-seeded bog sedge
Carex gracillima Schwein. - purple-sheathed graceful sedge
Carex granularis Muhl. ex Willd. - limestone meadow sedge
Carex gravida L.H.Bailey - long-awned bracted sedge
Carex haydenii Dewey - long-scaled tussock sedge
Carex intumescens Rudge - swollen sedge
Carex lacustris Willd. - rip-gut sedge
Carex lurida Wahlenb. - shallow 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 projecta Mack. - necklace sedge
Carex sartwellii Dewey - Sartwell's sedge
Carex scoparia var. scoparia - lance-fruited oval sedge
Carex sterilis Willd. - fen star sedge
Carex stricta Lam. - uptight 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 strigosus L. - straw-colored cyperus
Eleocharis compressa var. compressa - flat-stemmed spike-rush
Eleocharis intermedia Schult. - matted spike-rush
Schoenoplectus pungens (Vahl) Palla - common three-square bulrush
Scirpus atrovirens Willd. - dark-green bulrush
Scirpus hattorianus Makino - mosquito bulrush
Scirpus pendulus Muhl. - rufous bulrush
Cystopteris bulbifera (L.) Bernh. - bulblet fragile fern
Cystopteris tenuis (Michx.) Desv. - upland brittle 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
Epigaea repens L. - trailing-arbutus
Monotropa uniflora L. - Indian-pipe
Pyrola elliptica Nutt. - wax-flower shin-leaf
Vaccinium angustifolium Aiton - low sweet blueberry
Acalypha gracilens subsp. gracilens - slender three-seeded-mercury
Euphorbia corollata L. - flowering spurge
Euphorbia cyparissias L. - graveyard spurge
Euphorbia nutans Lag. - nodding spurge
Apios americana Medik. - Indian-potato
Baptisia lactea (Raf.) Thieret - white wild indigo
Baptisia leucophaea Nutt. - plains wild indigo
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
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
Trifolium campestre Schreb. - pinnate hop clover
Vicia villosa Roth - winter vetch
Quercus alba L. - white oak
Quercus bicolor Willd. - swamp white oak
Quercus rubra L. - northern red oak
Gentiana andrewsii var. andrewsii - prairie closed gentian
Gentiana rubricaulis Schwein. - Great Lakes gentian
Gentianopsis virgata (Raf.) Holub - small fringed gentian
Geranium maculatum L. - wild geranium
Ribes cynosbati L. - prickly wild gooseberry
Myriophyllum sp. L. - Water-Milfoil
Myriophyllum sibiricum Kom. - short-spike water-milfoil
Myriophyllum spicatum L. - spike water-milfoil
Elodea canadensis Michx. - common waterweed
Najas marina L. - spiny naiad
Hypericum kalmianum L. - Kalm's 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
Hypoxis hirsuta (L.) Coville - yellow star-grass
Sisyrinchium atlanticum E.P.Bicknell - eastern blue-eyed-grass
Sisyrinchium campestre E.P.Bicknell - prairie blue-eyed-grass
Carya ovata var. ovata - shellbark hickory
Juglans nigra L. - black walnut
Juncus alpinoarticulatus Chaix - northern green rush
Juncus dudleyi Wiegand - Dudley's rush
Juncus marginatus Rostk. - grassleaf rush
Juncus nodosus L. - knotted rush
Juncus tenuis Willd. - roadside rush
Triglochin maritima L. - seaside arrow-grass
Triglochin palustris L. - slender bog arrow-grass
Hedeoma hispida Pursh - rough pennyroyal
Lycopus uniflorus Michx. - northern water-horehound
Mentha spicata L. - spearmint
Scutellaria lateriflora L. - mad-dog skullcap
Utricularia vulgaris L. - great bladderwort
Lilium michiganense Farw. - Turk's-cap lily
Triantha glutinosa (Michx.) Baker - sticky false asphodel
Lindernia dubia var. dubia - yellow-seed false pimpernel
Lythrum salicaria L. - spiked loosestrife
Rhexia virginica L. - Virginia meadow-beauty
Menyanthes trifoliata L. - common buckbean
Mollugo verticillata L. - Indian chickweed
Morus alba L. - white mulberry
Aletris farinosa L. - white stargrass
Nelumbo lutea Willd. - water-chinquapin
Nuphar variegata Durand - bull-head pond-lily
Nymphaea odorata Aiton - fragrant water-lily
Circaea canadensis subsp. canadensis (L.) Hill - broad-leaf enchanter's-nightshade
Epilobium coloratum Biehler - eastern willow-herb
Epilobium leptophyllum Raf. - fen willow-herb
Epilobium strictum Muhl. ex Spreng. - northeastern willow-herb
Ludwigia alternifolia L. - square-pod water-primrose
Ludwigia polycarpa Short & R.Peter - top-pod water-primrose
Oenothera biennis L. - common evening-primrose
Oenothera laciniata subsp. laciniata - ragged evening-primrose
Oenothera villosa subsp. villosa - hairy evening-primrose
Platanthera lacera (Michx.) G.Don - ragged fringed orchid
Spiranthes cernua (L.) Rich. - nodding lady's-tresses
Agalinis paupercula (A.Gray) Britton - smooth false foxglove
Agalinis tenuifolia (Vahl) Raf. - common false foxglove
Aureolaria grandiflora var. pulchra Pennell - large-flowered yellow false foxglove
Aureolaria pedicularia (L.) Raf. - clammy false foxglove
Castilleja coccinea (L.) Spreng. - scarlet painted-cup
Osmunda cinnamomea L. - cinnamon fern
Osmunda claytoniana L. - interrupted fern
Oxalis dillenii Jacq. - southern yellow wood-sorrel
Oxalis stricta L. - tall wood-sorrel
Penthorum sedoides L. - ditch stonecrop
Phryma leptostachya L. - American lop-seed
Pinus strobus L. - eastern white pine
Chelone glabra L. - white turtlehead
Linaria vulgaris Mill. - butter-and-eggs
Penstemon digitalis Nutt. ex Sims - tall white beard-tongue
Penstemon gracilis Nutt. - slender beard-tongue
Penstemon pallidus Small - pale beard-tongue
Plantago rugelii Decne. - Rugel's plantain
Agrostis stolonifera L. - creeping tickle grass
Alopecurus pratensis L. - meadow foxtail
Aristida basiramea Engelm. ex Vasey - fork-tip three-awn grass