Abbreviations: n=native i=introduced
A=aquatic/wetland F=forest G=cool-season grasslands O=successional/disturbed
sites P=native tallgrass prairie
BW=Baldwin Woods RT=Robinson Tract TC=Tri-County
area
V=Voucher specimen R=Reliable report
Families: Aa-Az B-Cn Co-E F-G H-L M-O Pa-Pok Pol-Pz R-T U-Z
| Family | Genus/Species | Common Name | Origin | Habitat | BW | RT | TC |
| Acanthaceae | Ruellia humilis | Fringeleaf ruellia | n | G,P | R | V | |
| Ruellia strepens | Woodland ruellia | n | F | V | R | V | |
| Aceraceae | Acer negundo | Box elder | n | F | V | R | V |
| Acer saccharinum | Silver maple | n | F | R | V | ||
| Acer saccharum | Sugar maple | n | F | R | |||
| Alismataceae | Sagittaria cuneata | Duckpotato arrowhead | n | A | V | ||
| Sagittaria latifolia | Common arrowhead | n | A | V | |||
| Amaranthaceae | Amaranthus hybridus | Slender pigweed | i | O | R | R | |
| Amaranthus palmeri | Palmer's pigweed | n | O | R | |||
| Amaranthus rudis | Water hemp | n | A,O,P | V | R | V | |
| Froelichia floridana var. campestris | Field snakecotton | n | O | R | |||
| Anacardiaceae | Rhus aromatica | Fragrant sumac | n | F | R | V | |
| Rhus copallina | Dwarf sumac | n | F,P | V | R | V | |
| Rhus glabra | Smooth sumac | n | F,P | V | R | V | |
| Toxicodendron radicans | Poison ivy | n | F,G,O | R | R | R | |
| Annonaceae | Asimina triloba | Pawpaw | n | F | V | V | |
| Apiaceae | Chaerophyllum procumbens | Spreading chervil | n | F | V | V | |
| Chaerophyllum tainturieri | Erect chervil | n | P | R | V | ||
| Conium maculatum | Poison hemlock | i | O | V | |||
| Cryptotaenia canadensis | Honewort | n | F | V | V | ||
| Eryngium yuccifolium | Button snakeroot | n | P | R | V | ||
| Lomatium foeniculaceum | Carrotleaf lomatium | n | P | R | |||
| Osmorhiza longistylis | Anise root | n | F | V | R | V | |
| Polytaenia nuttallii | Prairie parsley | n | P | V | |||
| Sanicula canadensis | Canada sanicle | n | F | V | V | ||
| Sanicula gregaria | Cluster sanicle | n | F | V | R | V | |
| Spermolepis inermis | Spreading spermolepis | n | O | V | |||
| Torilis arvensis | Hedge parsley | i | O | V | V | V | |
| Zizea aurea | Golden alexanders | n | F,O,P | V | |||
| Apocynaceae | Apocynum cannabinum | Hemp dogbane | n | A,O,P | V | R | V |
| Vinca minor | Common periwinkle | i | O | V | |||
| Araceae | Arisaema dracontium | Green dragon | n | F | V | R | |
| Arisaema triphyllum | Jack-in-the-pulpit | n | F | V | V | ||
| Araliaceae | Aralia racemosa | American spikenard | n | F | V | ||
| Asclepiadaceae | Asclepias incarnata | Swamp milkweed | n | A | V | ||
| Asclepias meadii | Mead's milkweed | n | P | V | |||
| Asclepias purpurascens | Purple milkweed | n | F | V | R | ||
| Asclepias stenophylla | Narrowleaf milkweed | n | P | V | |||
| Asclepias sullivantii | Smooth milkweed | n | P | V | V | ||
| Asclepias syriaca | Common milkweed | n | O,P | V | R | V | |
| Asclepias tuberosa | Butterfly milkweed | n | G,P | R | R | V | |
| Asclepias verticillata | Whorled milkweed | n | G,O,P | V | R | V | |
| Asclepias viridiflora | Green milkweed | n | P | V | |||
| Asclepias viridis | Spider milkweed | n | G,O | V | V | ||
| Cynanchum laeve | Climbing milkweed | n | F | V | R | ||
| Asteraceae | Achillea millefolium ssp. lanulosa | Yarrow | n | G,O,P | R | R | V |
| Ambrosia artemisiifolia | Common ragweed | n | A,O | V | R | V | |
| Ambrosia psilostachya | Western ragweed | n | P | R | V | ||
| Ambrosia trifida | Giant ragweed | n | A,O | V | R | V | |
| Amphiachyris dracunculoides | Annual broomweed | n | O | R | |||
| Antennaria neglecta | Field pussytoes | n | G,O,P | V | R | ||
| Antennaria parlinii | Plantainleaf pussytoes | n | F | V | V | ||
| Arctium minus | Common burdock | i | O | V | R | ||
| Artemisia ludoviciana | Louisiana sage | n | O | V | |||
| Aster drummondi | Drummond's aster | n | F | V | V | ||
| Aster ericoides | Heath aster | n | P | R | V | ||
| Aster lanceolatus ssp. simplex | Panicled aster | n | O | R | |||
| Aster novae-angliae | New England aster | n | P | R | V | ||
| Aster oolentangiensis | Azure aster | n | P | V | |||
| Aster pilosus | White aster | n | G,O,P | V | R | V | |
| Aster praealtus | Willowleaf aster | n | F,P | R | V | ||
| Bidens aristosa var. retrorsa | Coreopsis beggartick | n | A,O,P | R | V | ||
| Bidens bipinnata | Spanish needles | n | O | V | R | ||
| Bidens frondosa | Devil's beggartick | n | A | V | V | ||
| Bidens vulgata | Tall beggartick | n | A | R | |||
| Cacalia artriplicifolia | Pale Indian plantain | n | F | V | V | V | |
| Cacalia plantaginea | Tuberous Indian plantain | n | P | R | V | ||
| Carduus nutans | Musk thistle | i | G,O | V | V | R | |
| Chrysanthemum leucanthemum | Ox-eye daisy | i | G | V | |||
| Cirsium altissimum | Tall thistle | n | A,G,O,P | V | R | V | |
| Cirsium undulatum | Wavyleaf thistle | n | P | V | |||
| Cirsium vulgare | Bull thistle | i | O | R | |||
| Conyza canadensis | Horseweed | n | A,O | V | R | V | |
| Coreopsis palmata | Finger coreopsis | n | P | R | V | ||
| Echinacea pallida | Pale purple coneflower | n | P | R | V | ||
| Eclipta prostrata | Yerba de Jajo | n | O | V | |||
| Erechtites hieracifolia | American burnweed | n | A | V | V | ||
| Erigeron annuus | Annual fleabane | n | O | V | V | ||
| Erigeron philadelphicus | Philadelphia fleabane | n | F | V | V | ||
| Erigeron strigosus | Daisy fleabane | n | G,O,P | V | R | V | |
| Eupatorium altissimum | Tall eupatorium | n | G,O,P | V | R | V | |
| Eupatorium perfoliatum | Common boneset | n | A | V | |||
| Eupatorium purpureum | Sweet joe-pye weed | n | F | V | V | ||
| Eupatorium rugosum | White snakeroot | n | F | V | R | V | |
| Eupatorium serotinum | Late eupatorium | n | F | R | |||
| Euthamia graminifolia | Grassleaf euthamia | n | G | R | V | ||
| Euthamia gymnospermoides | Viscid euthamia | n | G,P | V | |||
| Gnaphalium obtusifolium | Fragrant cudweed | n | O,P | V | R | V | |
| Gnaphalium purpureum | Purple cudweed | n | P | R | |||
| Grindelia squarrosa | Curlycup gumweed | n | O | R | |||
| Helenium autumnale | Common sneezeweed | n | A | V | R | ||
| Helianthus annuus | Common sunflower | n | G,O,P | R | R | V | |
| Helianthus grosseserratus | Sawtooth sunflower | n | G,P | V | |||
| Helianthus hirsutus | Hairy sunflower | n | F | V | V | ||
| Helianthus mollis | Ashy sunflower | n | G,P | V | |||
| Helianthus rigidus | Stiff sunflower | n | G,P | V | |||
| Helianthus tuberosus | Jerusalem artichoke | n | F | R | R | ||
| Heliopsis helianthoides var. scabra | False sunflower | n | F,G | R | V | ||
| Hieracium longipilum | Longbeard hawkweed | n | O,P | V | R | ||
| Iva annua | Annual sumpweed | n | A | V | R | V | |
| Krigia caespitosa | Dwarf dandelion | n | P | V | |||
| Kuhnia eupatorioides | False boneset | n | G,P | R | V | ||
| Lactuca canadensis | Canada lettuce | n | O,P | V | R | V | |
| Lactuca floridana | Florida lettuce | n | F | V | R | ||
| Lactuca ludoviciana | Louisiana lettuce | n | G,P | R | V | ||
| Lactuca saligna | Willowleaf lettuce | i | O | V | V | ||
| Lactuca serriola | Prickly lettuce | i | O | V | R | V | |
| Liatris aspera | Rough gayfeather | n | P | R | V | ||
| Liatris hirsuta | Hairy gayfeather | n | P | V | V | ||
| Liatris punctata | Dotted gayfeather | n | P | V | |||
| Liatris pycnostachya | Thickspike gayfeather | n | G,P | V | |||
| Prenanthes aspera | Rough whitelettuce | n | P | V | |||
| Pyrrhopappus carolinianus | Carolina false dandelion | n | O | V | R | V | |
| Ratibida columnifera | Yellow prairie coneflower | n | P | R | |||
| Ratibida pinnata | Grayhead prairie coneflower | n | G,P | V | V | ||
| Rudbeckia hirta var. pulcherrima | Black-eyed susan | n | G,O,P | V | R | V | |
| Rudbeckia laciniata | Golden glow | n | A | V | |||
| Silphium integrifolium | Wholeleaf rosinweed | n | P | V | R | ||
| Silphium laciniatum | Compass plant | n | G,P | V | V | ||
| Silphium perfoliatum | Cupleaf rosinweed | n | A | V | V | ||
| Solidago canadensis var. hargeri | Harger's Canada goldenrod | n | O,P | V | |||
| Solidago candensis var. scabra | Rough Canada goldenrod | n | O,P | R | R | V | |
| Solidago gigantea | Giant goldenrod | n | P | V | V | V | |
| Solidago missouriensis | Prairie goldenrod | n | G,P | R | V | ||
| Solidago nemoralis | Gray goldenrod | n | O,P | V | V | ||
| Solidago petiolaris var. angusta | Downy goldenrod | n | G | R | |||
| Solidago rigida | Stiff goldenrod | n | G,P | V | |||
| Solidago ulmifolia var. ulmifolia | Elmleaf goldenrod | n | F | V | V | ||
| Sonchus asper | Prickly sowthistle | i | A,O | V | |||
| Taraxacum erythrospermum | Redseed dandelion | i | O | R | |||
| Taraxacum officinale | Common dandelion | i | O | V | R | V | |
| Tragopogon dubius | Goat's beard | i | O | V | R | V | |
| Tragopogon pratensis | Meadow salsify | i | O | R | |||
| Verbesina alternifolia | Wingstem crownbeard | n | A,F | V | V | R | |
| Vernonia baldwinii ssp. interior | Inland ironweed | n | F,G,O,P | V | R | V | |
| Xanthium strumarium | Cocklebur | n | A,O | V | R | ||
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