| Acorus americanus | Sweet Flag | 7,000 | 1'-4' | Green | May-Jun |
| Agalinis purpurea | Purple False Foxglove | 781,250 | 1'-2' | Lavender | Aug-Oct |
| Agalinis tenuifolia | Slender False Foxglove | 781,250 | 1'-2' | Lavender | Aug-Oct |
| Agastache foeniculum | Lavender Hyssop | 65,000 | 2'-4' | Purple | Jun-Sep |
| Agastache nepetoides | Yellow Giant Hyssop | 90,000 | 3'-7' | Yellow | Jul-Oct |
| Ageratina altissima | White Snakeroot | 150,000 | 2'-4' | White | Jul-Oct |
| Alisma subcordatum | Common Water Plantain | 70,175 | 2'-4' | White | Jul-Sep |
| Allium cernuum | Nodding Onion | 7,700 | 1'-2' | White/Lavender | Jul-Oct |
| Allium tricoccum | Wild Leek | 1,400 | 6"-1' | White | Jun-Aug |
| Ammophila breviligulata | Dune Grass | 107,800 | 2'-3' | Green | Jul-Sep |
| Amorpha canescens | Lead Plant | 17,000 | 2'-3' | Purple | Jun-Aug |
| Amorpha fruticosa | Indigo Bush | 3,700 | 12'-17' | Purple | May-Aug |
| Andropogon gerardii | Big Bluestem | 8,188 | 4'-8' | Purple | Jul-Sep |
| Andropogon virginicus | Broom Sedge | 15,625 | 2'-3' | Brown | Aug-Sep |
| Anemone canadensis | Meadow Anemone | 9,250 | 1'-2' | White | May-Sep |
| Anemone cylindrica | Thimbleweed | 20,938 | 2'-3' | White | Jun-Aug |
| Anemone virginiana | Tall Anemone | 20,000 | 1'-3' | White | Jun-Aug |
| Angelica atropurpurea | Great Angelica | 6,250 | 4'-12' | White | May-Jun |
| Apocynum androsaemifolium | Spreading Dogbane | 20,000 | 1'-4' | Pink | May-Sep |
| Aquilegia canadensis | Wild Columbine | 25,000 | 1'-3' | Red/Yellow | Apr-Jul |
| Arisaema triphyllum | Jack-In-The-Pulpit | 425 | 1'-3' | Green | Apr-Jul |
| Arnoglossum atriplicifolium | Pale Indian Plantain | 6,500 | 3'-8' | White | Jun-Oct |
| Arnoglossum plantagineum | Prairie Indian Plantain | 5,938 | 3'-5' | White | Jun-Aug |
| Asclepias exalta | Poke Milkweed | 4,000 | 2'-5' | Green/Pink | Jun-Jul |
| Asclepias incarnata | Swamp Milkweed | 4,540 | 3'-5' | Pink | Jun-Sep |
| Asclepias purpurascens | Purple Milkweed | 5,141 | 2'-4' | Purple/Pink | Jun-Jul |
| Asclepias sullivantii | Prairie Milkweed | 5,300 | 2'-3' | Pink | Jun-Aug |
| Asclepias syriaca | Common Milkweed | 4,000 | 2'-4' | Pink | Jun-Aug |
| Asclepias tuberosa | Butterfly Weed | 3,500 | 1'-3' | Orange | Jun-Sep |
| Asclepias verticillata | Whorled Milkweed | 10,250 | 1'-1.5' | White | Jun-Sep |
| Astragalus canadensis | Canadian Milk Vetch | 16,000 | 1'-4' | Cream | Jun-Oct |
| Aureolaria flava | Smooth False Foxglove | 7,000 | 3'-5' | Yellow | Jul-Oct |
| Baptisia alba | White Wild Indigo | 1,600 | 3'-4' | White | May-Aug |
| Baptisia australis | Blue Wild Indigo | 1,600 | 1'-4' | Blue | May-Jun |
| Baptisia bracteata | Cream Wild Indigo | 1,700 | 3'-4' | Cream | May-Jun |
| Baptisia tinctoria | Yellow Wild Indigo | 5,200 | 2'-3' | Yellow | Jun-Aug |
| Bidens cernua | Nodding Bur Marigold | 14,175 | 1'-4' | Yellow | Jun-Oct |
| Bidens coronata | Tall Swamp Marigold | 8,925 | 2'-5' | Yellow | Jun-Oct |
| Bidens frondosa | Common Beggars-Tick | 5,250 | 1'-4' | Orange | Jul-Sep |
| Blephilia hirsuta | Wood Mint | 233,539 | 1'-3' | White | Jun-Oct |
| Boehmeria cylindrica | False Nettle | 20,313 | 3-4' | Yellow | Jul-Aug |
| Bolboschoenus fluviatilis | River Bulrush | 275,000 | 3'-7' | Brown | May-Jul |
| Boltonia asteroides | False Aster | 141,750 | 3'-5' | White/Yellow | Aug-Oct |
| Bouteloua curtipendula | Side-Oats Grama | 9,375 | 2'-4' | Red | Jul-Oct |
| Bromus ciliatus | Fringed Brome | 6,188 | 2'-4' | Brown | Jun-Jul |
| Bromus pubescens | Woodland Brome | 7,188 | 2'-4' | Brown | Jun-Jul |
| Calamagrostis canadensis | Bluejoint Grass | 94,500 | 2'-4' | Brown | Jun |
| Calamovilfa longifolia | Sand Reed | 17,125 | 3'-6' | Brown | Jul-Sep |
| Caltha palustris | Marsh Marigold | 50,000 | 1'-2' | Yellow | Mar-Jun |
| Campanula rotundifolia | Harebell | 900,000 | 1'-2' | Blue | Jun-Oct |
| Campanulastrum americanum | Tall Bellflower | 800,000 | 2'-6' | Blue | Jul-Nov |
| Carex annectens var. xanthocarpa | Small Yellow Fox Sedge | 85,000 | 2'-3' | Green | May-Jun |
| Carex aquatilis | Long-Bracted Tussock Sedge | 125,000 | 2'-3' | Green | Apr-Jun |
| Carex bebbii | Bebb's Oval Sedge | 100,000 | 2'-3' | Green | Jun |
| Carex bicknellii | Copper-Shouldered Oval Sedge | 33,422 | 1'-2' | Green | May-Jun |
| Carex blanda | Common Wood Sedge | 12,500 | 1'-2' | Green | Apr-Jun |
| Carex brevior | Plains Oval Sedge | 27,500 | 1'-2' | Green | May-Jun |
| Carex buxbaumii | Buxbaum's Sedge | 14,500 | 2'-3' | Green | May-Jun |
| Carex comosa | Bristly Sedge | 41,183 | 2'-3' | Green | May-Jun |
| Carex crinita | Fringed Sedge | 141,750 | 2'-5' | Green | May |
| Carex cristatella | Crested Oval Sedge | 59,000 | 2'-3' | Green | May-Jun |
| Carex davisii | Awned Graceful Sedge | 9,000 | 2'-3' | Green | May |
| Carex emoryi | Riverbank Sedge | 140,625 | 2'-3 | Green | May |
| Carex frankii | Bristly Cattail Sedge | 31,250 | 1'-2' | Green | Jun-Jul |
| Carex gracillima | Graceful Sedge | 100,000 | 2'-3' | Green | Apr-Jun |
| Carex granularis | Pale Sedge | 15,500 | 1'-2' | Green | May-Jun |
| Carex grayi | Common Bur Sedge | 1,200 | 1'-2' | Green | May-Jun |
| Carex hystericina | Porcupine Sedge | 36,000 | 2'-3' | Green | May-Jun |
| Carex lacustris | Common Lake Sedge | 26,000 | 2'-4' | Green | May-Jun |
| Carex lupulina | Common Hop Sedge | 3,635 | 2'-3' | Green | May-Jun |
| Carex lurida | Bottlebrush Sedge | 12,000 | 2'-3' | Green | May-Jun |
| Carex molesta | Field Oval Sedge | 27,500 | 1'-3' | Green | Jun-Jul |
| Carex muhlenbergii | Sand Bracted Sedge | 11,875 | 1'-3' | Green | May-Jun |
| Carex muskingumensis | Swamp Oval Sedge | 81,250 | 1'-2' | Green | May-Jun |
| Carex normalis | Spreading Oval Sedge | 25,000 | 1'-3' | Green | May-Jun |
| Carex pellita | Wooly Sedge | 28,000 | 1'-2' | Green | May-Jun |
| Carex pensylvanica | Common Oak Sedge | 29,000 | 6"-1' | Green | Apr-May |
| Carex projecta | Loose-Headed Oval Sedge | 131,094 | 1'-3' | Green | May-Jun |
| Carex scoparia | Lance-Fruited Oval Sedge | 83,250 | 2'-3' | Green | May-Jun |
| Carex sparganioides v. cephaloidea | Rough-Clustered Sedge | 15,500 | 1'-3' | Green | May-Jun |
| Carex squarrosa | Narrow-Leaved Cattail Sedge | 25,111 | 1'-2' | Green | May-Jun |
| Carex stipata | Common Fox Sedge | 35,625 | 1'-3' | Green | Apr-May |
| Carex stricta | Common Tussock Sedge | 187,500 | 2'-3' | Green | Apr-Jun |
| Carex tribuloides | Awl-Fruited Oval Sedge | 118,750 | 2'-3' | Green | May-Jul |
| Carex typhina | Common Cattail Sedge | 15,375 | 1'-2' | Green | Jun |
| Carex vulpinoidea | Brown Fox Sedge | 125,000 | 2'-3' | Green | May-Jun |
| Caulophyllum thalictroides | Blue Cohosh | 120 | 1'-3' | Yellow | Apr-May |
| Ceanothus americanus | New Jersey Tea | 7,000 | 1'-3' | White | Jun-Oct |
| Chamaecrista fasciculata | Partridge Pea | 3,800 | 1'-3' | Yellow | Jun-Oct |
| Chasmanthium latifolium | Indian Wood Oats | 7,500 | 2'-3' | Green | Jul-Aug |
| Chelone glabra | Turtlehead | 96,875 | 2'-4' | Cream | Aug-Sep |
| Cinna arundinacea | Common Wood Reed | 308,750 | 3'-4' | Green | Aug-Sep |
| Cirsium discolor | Pasture Thistle | 6,400 | 2'-8' | Pink | Jul-Sep |
| Clematis virginiana | Virgin's Bower | 13,600 | Vine | White | Jul-Oct |
| Conoclinium coelestinum | Blue Mistflower | 315,000 | 1'-3' | Blue | Aug-Sep |
| Coreopsis lanceolata | Sand Coreopsis | 12,500 | 1'-2' | Yellow | May-Aug |
| Coreopsis palmata | Prairie Coreopsis | 11,875 | 1'-2' | Yellow | Jun-Aug |
| Coreopsis tripteris | Tall Coreopsis | 11,500 | 4'-8' | Yellow/Brown | Aug-Sep |
| Dalea candida | White Prairie Clover | 26,250 | 1'-3' | White | Jun-Oct |
| Dalea purpurea | Purple Prairie Clover | 20,000 | 1'-3' | Purple | Jun-Sep |
| Decodon verticillatus | Swamp Loosestrife | 40,250 | 2'-4' | Pink | Jul-Sep |
| Desmanthus illinoensis | Illinois Sensitive Plant | 4,888 | 3'-5' | White | Jul-Aug |
| Desmodium canadense | Showy Tick Trefoil | 4,500 | 2'-5' | Purple | Jun-Sep |
| Desmodium illinoense | Illinois Tick Trefoil | 4,250 | 3'-6' | Purple | Jul-Aug |
| Desmodium sessilifolium | Sessile-Leaved Tick Trefoil | 5,125 | 2'-4' | Purple | Jul-Sep |
| Diarrhena americana | Beak Grass | 3,320 | 1'-3' | Green | Jul |
| Dodecatheon meadia | Shooting Star | 75,000 | 1'-3' | White/Pink | Apr-May |
| Doellingeria umbellata | Flat-Top Aster | 315,000 | 1'-4' | White/Yellow | Jul-Oct |
| Dulichium arundinaceum | Three-Way Sedge | 100,000 | 1'-3' | Green | Jul-Aug |
| Echinacea pallida | Purple Coneflower | 5,000 | 2'-5' | Lavender | May-Aug |
| Echinacea purpurea | Broad-Leaved Purple Coneflower | 6,600 | 3'-4' | Purple | Jun-Aug |
| Eleocharis acicularis | Needle Spike Rush | 70,000 | 5"-7" | Green | May-Oct |
| Eleocharis obtusa | Blunt Spike Rush | 95,000 | 6"-1' | Green | May-Sep |
| Eleocharis palustris | Great Spike Rush | 141,750 | 1'-2' | Green | Jul |
| Elymus canadensis | Canada Wild Rye | 4,258 | 3'-6' | Green | Jun-Sep |
| Elymus hystrix | Bottlebrush Grass | 4,700 | 3'-5' | Green | Jun-Jul |
| Elymus riparius | Riverbank Wild Rye | 5,531 | 2'-4' | Green | Jul-Aug |
| Elymus villosus | Silky Wild Rye | 7,800 | 1'-3' | Green | Jul |
| Elymus virginicus | Virginia Wild Rye | 4,375 | 2'-4' | Green | Jun |
| Epilobium coloratum | Cinnamon Willow Herb | 55,000 | 1'-3' | Pink | Jun-Sep |
| Equisetum hyemale | Tall Scouring Rush | - | 1'-3' | Brown | Apr-Aug |
| Eragrostis spectabilis | Purple Love Grass | 66,000 | 1'-2' | Purple | Jul-Aug |
| Eryngium yuccifolium | Rattlesnake Master | 8,000 | 3'-5' | White | Jul-Sep |
| Eupatorium perfoliatum | Common Boneset | 125,000 | 3'-5' | White | Jul-Oct |
| Eupatorium serotinum | Late Boneset | 60,500 | 2'-5' | White | Jul-Oct |
| Euphorbia corollata | Flowering Spurge | 10,000 | 2'-4' | White | May-Oct |
| Eurybia macrophylla | Big-Leaved Aster | 21,600 | 6"-2' | Lavender/White/Yellow | Jul-Oct |
| Euthamia graminifolia | Common Grass-Leaved Goldenrod | 546,875 | 1'-4' | Yellow | Jul-Sep |
| Eutrochium fistulosum | Hollow Joe-Pye Weed | 78,125 | 5'-9' | Pink | Jul-Aug |
| Eutrochium maculatum | Spotted Joe-Pye Weed | 78,125 | 4'-7' | Pink | Jun-Oct |
| Eutrochium purpureum | Purple Joe-Pye Weed | 48,000 | 3'-6' | Pink | Jul-Sep |
| Filipendula rubra | Queen Of The Prairie | 9,375 | 3'-6' | Pink | Jul |
| Gentiana andrewsii | Bottle Gentian | 227,000 | 1'-3' | Blue | Aug-Oct |
| Gentiana flavida | Cream Gentian | 180,000 | 1'-3' | Cream | Sep-Oct |
| Geranium maculatum | Wild Geranium | 4,850 | 1'-2' | Lavender | Apr-Jul |
| Geum laciniatum | Northern Rough Avens | 25,000 | 1-3' | White | May-Jun |
| Geum triflorum | Prairie Smoke | 33,000 | 6"-1' | Pink | Apr-Jun |
| Glyceria canadensis | Rattlesnake Grass | 74,000 | 2'-5' | Green | Jun |
| Glyceria striata | Fowl Manna Grass | 125,000 | 1'-5' | Green | May-Jun |
| Helenium autumnale | Sneezeweed | 141,750 | 3'-5' | Yellow | Jul-Nov |
| Helianthus giganteus | Tall Sunflower | 10,938 | 4'-12' | Yellow | Jul-Sep |
| Helianthus grosseserratus | Sawtooth Sunflower | 12,500 | 4'-12' | Yellow | Jul-Oct |
| Helianthus mollis | Downy Sunflower | 7,700 | 2'-4' | Yellow | Jul-Sep |
| Helianthus occidentalis | Western Sunflower | 13,000 | 2'-4' | Yellow | Aug-Sep |
| Helianthus pauciflorus | Prairie Sunflower | 15,625 | 3'-5' | Yellow/Brown | Jul-Oct |
| Helianthus strumosus | Pale-Leaved Sunflower | 7,200 | 2'-5' | Yellow | Jul-Oct |
| Helianthus tuberosus | Jerusalem Artichoke | 7,813 | 5'-10' | Yellow/Brown | Aug-Oct |
| Heliopsis helianthoides | False Sunflower | 6,500 | 4'-6' | Yellow | Jun-Oct |
| Heracleum lanatum | Cow Parsnip | 3,016 | 4'-10' | White | May-Jul |
| Heuchera richardsonii | Prairie Alum Root | 800,000 | 1'-3' | Green | May-Sep |
| Hibiscus laevis | Smooth Rose Mallow | 2,188 | 3'-7' | White/Pink | Jul-Sep |
| Hibiscus moscheutos | Swamp Rose Mallow | 2,188 | 3'-7' | White/Pink/Red | Jul-Sep |
| Hierochloe odorata | Sweet Grass | 41,000 | 1'-3' | Green | Apr-Jun |
| Hydrophyllum virginianum | Virginia Waterleaf | 2,800 | 1'-2' | Lavender | May-Jun |
| Hypericum kalmianum | Kalm's St. John's Wort | 121,336 | 2'-4' | Yellow | Jun-Aug |
| Hypericum pyramidatum | Great St. John's Wort | 220,000 | 3'-6' | Yellow | Jul-Aug |
| Iris virginica | Blue Flag | 1,400 | 2'-3' | Lavender/Purple | May-Jul |
| Juncus canadensis | Canadian Rush | 1,000,000 | 1'-3' | Brown | Jul-Sep |
| Juncus effusus | Common Rush | 1,000,000 | 1'-4' | Brown | Jun |
| Juncus interior | Inland Rush | 2,800,000 | 6"-2' | Brown | Jun-Jul |
| Juncus tenuis | Path Rush | 1,000,000 | 6"-2' | Brown | Jun |
| Juncus tenuis v. dudleyi | Dudley's Rush | 2,270,000 | 1'-2' | Brown | May-Jul |
| Juncus torreyi | Torrey's Rush | 1,134,000 | 1'-2' | Brown | Jun-Sep |
| Justicia americana | Water Willow | 75,000 | 1'-2' | Lavender | Jun-Aug |
| Koeleria pyramidata | June Grass | 150,000 | 1'-2' | Cream | May-Jul |
| Kuhnia eupatorioides v.corymbulosa | False Boneset | 29,500 | 1'-4' | White | Aug-Oct |
| Leersia oryzoides | Rice Cut Grass | 94,500 | 2'-5' | Green | Jul-Sep |
| Lespedeza capitata | Round-Headed Bush Clover | 10,000 | 2'-4' | White | Jul-Sep |
| Liatris aspera | Rough Blazing Star | 13,000 | 2'-3' | Pink | Jul-Nov |
| Liatris cylindracea | Cylindrical Blazing Star | 13,300 | 1'-2' | Pink | Jul-Oct |
| Liatris pycnostachya | Prairie Blazing Star | 10,750 | 2'-4' | Pink | Jul-Sep |
| Liatris scariosa v. nieuwlandii | Savanna Blazing Star | 13,000 | 3'-5' | Pink | Aug-Oct |
| Liatris spicata | Marsh Blazing Star | 12,000 | 3'-5' | Pink | Jul-Sep |
| Lobelia cardinalis | Cardinal Flower | 437,500 | 2'-5' | Red | Jul-Oct |
| Lobelia inflata | Indian Tobacco | 495,000 | 1'-3' | Cream | Jun-Oct |
| Lobelia siphilitica | Great Blue Lobelia | 520,000 | 1'-4' | Blue | Jul-Oct |
| Lobelia spicata | Pale Spiked Lobelia | 90,000 | 1'-3' | Lavender | May-Aug |
| Ludwigia alternifolia | Seedbox | 281,250 | 2'-3' | Yellow | Jun-Aug |
| Lupinus perennis | Wild Lupine | 1,000 | 1'-2' | Blue/Violet | Apr-Jul |
| Lycopus americanus | Common Water Horehound | 235,000 | 1'-2' | White | Jul-Sep |
| Lythrum alatum | Winged Loosestrife | 3,000,000 | 2'-3' | Purple | Jun-Sep |
| Mentha arvensis | Wild Mint | 315,000 | 1'-3' | White | Jul-Sep |
| Mertensia virginica | Virginia Bluebells | 9,650 | 1'-2' | Blue | Mar-May |
| Mimulus ringens | Monkey Flower | 283,500 | 2'-4' | Lavender | Jun-Sep |
| Monarda fistulosa | Wild Bergamot | 78,000 | 2'-5' | Lavender | Jul-Sep |
| Monarda punctata | Horse Mint | 94,000 | 1'-2' | Cream | Jul-Sep |
| Nelumbo lutea | Lotus | 32 | 3"-1' | Cream | Jul-Aug |
| Nuphar advena | Yellow Pond Lily | - | 0'-0' | Yellow | May-Sep |
| Nymphaea odorata | White Water Lily | - | 0'-0' | White | May-Sep |
| Oenothera biennis | Common Evening Primrose | 55,000 | 2'-6' | Yellow | Jun-Nov |
| Oligoneuron ohioense | Ohio Goldenrod | 90,000 | 2'-4' | Yellow | Jul-Oct |
| Oligoneuron riddellii | Riddell's Goldenrod | 94,500 | 2'-5' | Yellow | Sep-Nov |
| Oligoneuron rigidum | Stiff Goldenrod | 46,000 | 1'-5' | Yellow | Jul-Oct |
| Opuntia humifusa | Eastern Prickly Pear | 1,344 | 3"-6" | Yellow | Jun-Jul |
| Osmorhiza claytonii | Hairy Sweet Cicely | 2,400 | 1'-3' | White | May-Jun |
| Panicum virgatum | Switch Grass | 28,356 | 3'-5' | Green/Purple | Jun-Oct |
| Parthenium integrifolium | Wild Quinine | 6,800 | 2'-3' | White | Jun-Sep |
| Parthenocissus quinquefolia | Virginia Creeper | 1,875 | Vine | Green | Jul-Aug |
| Pedicularis lanceolata | Fen Betony | 32,500 | 1'-3' | Yellow | Aug-Oct |
| Peltandra virginica | Arrow Arum | 42 | 1'-3' | Green | Jun-Jul |
| Penstemon digitalis | Foxglove Beard Tongue | 115,000 | 2'-4' | White/Pink | May-Jul |
| Penstemon hirsutus | Hairy Beard Tongue | 125,000 | 1'-2' | Lavender | May-Jul |
| Penstemon laevigatus | Smooth Beard Tongue | 90,000 | 2'-4' | White | May-Jun |
| Penthorum sedoides | Ditch Stonecrop | 36,063 | 1'-3' | Green | Jun-Oct |
| Phlox divaricata | Woodland Phlox | 12,000 | 1'-2' | Blue | Apr-Jun |
| Phlox glaberrima interior | Marsh Phlox | 7,400 | 1'-2' | Pink/Lavender | Jun-Aug |
| Phlox pilosa | Sand Prairie Phlox | 18,750 | 1'-2' | Pink | May-Aug |
| Physostegia virginiana | Obedient Plant | 25,000 | 2'-5' | Pink | Aug-Oct |
| Polygonatum biflorum | Smooth Solomon's Seal | 1,200 | 1'-4' | Green/White | May-Jul |
| Polygonum amphibium v. stipulaceum | Water Knotweed | 3,125 | 1'-2' | Pink | Jun-Oct |
| Polygonum pensylvanicum | Pinkweed | 4,063 | 1'-5' | Pink | Jun-Oct |
| Pontederia cordata | Pickerel Weed | 1,250 | 1'-3' | Purple | Jun-Sep |
| Potamogeton natans | Common Pondweed | 22,500 | 0'-0' | Green/White | Jun-Jul |
| Potamogeton nodosus | Long-Leaved Pondweed | 22,500 | 0'-0' | Green/White | Jun-Jul |
| Potamogeton pectinatus | Sago Pondweed | 22,500 | 0'-0' | Green/White | May-Sep |
| Potentilla arguta | Prairie Cinquefoil | 175,000 | 1'-3' | White | Jun-Sep |
| Pycnanthemum muticum | Broad-Leaved Mountain Mint | 331,250 | 2'-4' | White | Aug-Sep |
| Pycnanthemum tenuifolium | Mountain Mint | 375,000 | 1'-3' | White | Jun-Aug |
| Pycnanthemum virginianum | Common Mountain Mint | 331,250 | 1'-3' | White | Jun-Oct |
| Ratibida pinnata | Yellow Coneflower | 25,250 | 3'-6' | Yellow/Brown | Jul-Oct |
| Rhexia virginica | Handsome Harry | 115,000 | 6"-2' | Lavender/Yellow | Aug-Sep |
| Rhynchospora macrostachya | Horned Beak Rush | 100,000 | 1'-2' | Brown | May-Jun |
| Rosa carolina | Pasture Rose | 2,900 | 1'-3' | Pink | Jun-Sep |
| Rosa palustris | Swamp Rose | 1,600 | 2'-7' | Pink | Jun-Aug |
| Rudbeckia fulgida | Showy Black-Eyed Susan | 31,000 | 2'-3' | Yellow/Brown | Aug-Sep |
| Rudbeckia hirta | Black-Eyed Susan | 110,000 | 1'-3' | Yellow/Brown | May-Oct |
| Rudbeckia laciniata | Wild Golden Glow | 15,000 | 3'-10' | Yellow | Jul-Nov |
| Rudbeckia subtomentosa | Sweet Black-Eyed Susan | 46,000 | 3'-5' | Yellow/Brown | Aug-Sep |
| Rudbeckia triloba | Brown-Eyed Susan | 33,000 | 2'-5' | Yellow/Brown | Aug-Oct |
| Rumex altissimus | Pale Dock | 15,000 | 2'-4' | Green | May-Jul |
| Rumex orbiculatus | Great Water Dock | 9,063 | 2'-5' | Green | May-Sep |
| Rumex verticillatus | Swamp Dock | 9,688 | 2'-5' | Green | Jun-Sep |
| Sabatia angularis | Rose Gentian | 406,250 | 1'-3' | Pink | Jul-Nov |
| Sagittaria latifolia | Common Arrowhead | 56,700 | 1'-4' | White | Jun-Sep |
| Saururus cernuus | Lizard's Tail | 343,750 | 2'-4' | White | Jun-Aug |
| Schizachyrium scoparium | Little Bluestem | 8,800 | 2'-4' | Brown | Aug-Sep |
| Schoenoplectus acutus | Hard-Stemmed Bulrush | 20,000 | 4'-6' | Brown | Apr-Aug |
| Schoenoplectus americanus | Chairmaker's Rush | 125,000 | 2'-5' | Brown | May-Sep |
| Schoenoplectus tabernaemontani | Great Bulrush | 37,813 | 4'-8' | Brown | May-Aug |
| Scirpus atrovirens | Dark Green Rush | 187,500 | 3'-5' | Brown | Jun-Aug |
| Scirpus cyperinus | Wool Grass | 562,500 | 3'-5' | Brown | Jun-Sep |
| Scirpus pendulus | Red Bulrush | 378,125 | 2'-4' | Brown | May-Jun |
| Scrophularia marilandica | Late Figwort | 125,000 | 3'-7' | Brown | Jun-Oct |
| Scutelleria lateriflora | Mad-Dog Skullcap | 65,000 | 1'-2' | Purple | Jun-Sep |
| Senna hebecarpa | Wild Senna | 1,400 | 3'-5' | Yellow | Jul-Aug |
| Silene regia | Royal Catchfly | 23,000 | 2'-4' | Red | Jul-Aug |
| Silene stellata | Starry Campion | 30,000 | 1'-2' | White | Jul-Oct |
| Silene virginica | Fire Pink | 26,000 | 6"-1' | Red | May-Jul |
| Silphium integrifolium | Rosin Weed | 4,000 | 2'-6' | Yellow | Jul-Sep |
| Silphium laciniatum | Compass Plant | 650 | 3'-8' | Yellow | Jun-Sep |
| Silphium perfoliatum | Cup Plant | 2,100 | 3'-10' | Yellow | Jul-Oct |
| Silphium terebinthinaceum | Prairie Dock | 1,100 | 3'-8' | Yellow | Jun-Sep |
| Sisyrinchium angustifolium | Stout Blue-Eyed Grass | 28,000 | 3"-1' | Blue | May-Aug |
| Sium suave | Tall Water Parsnip | 9,500 | 2'-6' | White | Jul-Sep |
| Smilacina racemosa | Feathery False Solomon's Seal | 900 | 1'-3' | White | Apr-Jun |
| Solidago caesia | Blue-Stemmed Goldenrod | 546,875 | 1'-2' | Yellow | Sep-Oct |
| Solidago flexicaulis | Broad-Leaved Goldenrod | 84,000 | 1'-3' | Yellow | Aug-Oct |
| Solidago juncea | Early Goldenrod | 140,625 | 2'-4' | Yellow | Jul-Sep |
| Solidago nemoralis | Old-Field Goldenrod | 240,000 | 1'-3' | Yellow | Aug-Nov |
| Solidago patula | Swamp Goldenrod | 71,875 | 3'-6' | Yellow | Aug-Oct |
| Solidago rugosa | Rough Goldenrod | 92,500 | 2'-5' | Yellow | Aug-Oct |
| Solidago speciosa | Showy Goldenrod | 105,000 | 1'-3' | Yellow | Jul-Oct |
| Solidago ulmifolia | Elm-Leaved Goldenrod | 130,000 | 2'-3' | Yellow | Jul-Oct |
| Sorghastrum nutans | Indian Grass | 8,516 | 4'-7' | Green | Aug-Sep |
| Sparganium americanum | American Bur Reed | 975 | 2'-5' | Green | Jun-Aug |
| Sparganium eurycarpum | Common Bur Reed | 596 | 2'-6' | Green | May-Aug |
| Spartina pectinata | Prairie Cord Grass | 15,750 | 3'-7' | Green | Jul-Aug |
| Spiraea alba | Meadowsweet | 390,625 | 3'-6' | White | Jun-Sep |
| Spiraea tomentosa | Steeplebush | 390,625 | 2'-5' | Pink | Jul-Sep |
| Sporobolus heterolepis | Prairie Dropseed | 14,000 | 2'-3' | Green | Aug-Sep |
| Stipa spartea | Porcupine Grass | 680 | 2'-4' | Green | Jun |
| Stylophorum diphyllum | Celandine Poppy | 12,400 | 2'-3' | Yellow | Apr-Jun |
| Symphyotrichum cordifolium | Heart-Leaved Aster | 131,250 | 2'-4' | Blue/White/Yellow | Sep-Oct |
| Symphyotrichum dumosum | Rice-Button Aster | 57,000 | 1'-3' | Lavender/White | Sep-Oct |
| Symphyotrichum ericoides | Heath Aster | 140,000 | 1'-3' | White/Yellow | Aug-Oct |
| Symphyotrichum laeve | Smooth Blue Aster | 48,000 | 3'-5' | Blue/Yellow | Aug-Oct |
| Symphyotrichum lanceolatum | Panicled Aster | 141,750 | 3'-5' | White/Yellow | Jul-Nov |
| Symphyotrichum lateriflorum | Side-Flowering Aster | 200,000 | 1'-3' | White/Yellow | Jul-Oct |
| Symphyotrichum novae-angliae | New England Aster | 76,000 | 3'-6' | Violet/Yellow | Jul-Oct |
| Symphyotrichum oblongifolium | Aromatic Aster | 51,000 | 2'-3' | Lavender | Aug-Oct |
| Symphyotrichum oolentangiense | Sky-Blue Aster | 82,000 | 1'-4' | Blue/Yellow | Jul-Nov |
| Symphyotrichum puniceum | Bristly Aster | 76,000 | 3'-6' | Lavender/White/Yellow | Aug-Oct |
| Symphyotrichum sericeum | Silky Aster | 57,000 | 1'-2' | Purple/Yellow | Aug-Oct |
| Symphyotrichum shortii | Short's Aster | 60,000 | 1'-4' | Blue/Yellow | Aug-Oct |
| Symphyotrichum urophyllum | Arrow-Leaved Aster | 110,000 | 2'-5' | Lavender/White/Yellow | Aug-Sep |
| Tephrosia virginiana | Goat's Rue | 2,500 | 1'-3' | Pink/Cream | Jun-Jul |
| Teucrium canadense | Germander | 19,500 | 1'-3' | Purple | Jul-Sep |
| Thalictrum dasycarpum | Purple Meadow Rue | 13,500 | 3'-6' | Cream | May-Jun |
| Thalictrum dioicum | Early Meadow Rue | 7,300 | 1'-3' | Green | Apr-May |
| Tradescantia ohiensis | Common Spiderwort | 8,000 | 2'-4' | Blue/Lavender | May-Oct |
| Triadenum virginicum | Marsh St. John's Wort | 230,000 | 1'-2' | Pink | Jul-Sep |
| Verbena hastata | Blue Vervain | 125,000 | 3'-6' | Purple | Jun-Sep |
| Verbena stricta | Hoary Vervain | 32,000 | 2'-4' | Purple | Jun-Sep |
| Verbesina alternifolia | Wingstem | 9,063 | 3'-7' | Yellow | Jul-Oct |
| Vernonia fasciculata | Common Ironweed | 21,875 | 3'-7' | Purple | Jul-Oct |
| Vernonia gigantea | Smooth Tall Ironweed | 24,000 | 4'-9' | Purple | Jul-Oct |
| Vernonia missurica | Missouri Ironweed | 20,900 | 3'-5' | Purple | Jul-Sep |
| Veronicastrum virginicum | Culver's Root | 750,000 | 3'-6' | White | Jun-Aug |
| Zizania aquatica | Wild Rice | 4,375 | 3'-7' | Green | Jul-Sep |
| Zizia aptera | Heart-Leaved Meadow Parsnip | 9,000 | 1'-2' | Yellow | Apr-May |
| Zizia aurea | Golden Alexanders | 12,000 | 1'-3' | Yellow | Apr-Jun |