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 |
| Malvaceae | Abutilon theophrasti | Velvetleaf | i | O | R | V | V |
| Hibiscus trionum | Flower-of-an-hour | i | O | V | R | V | |
| Malva neglecta | Common mallow | i | O | R | |||
| Malva rotundifolia | Roundleaf mallow | i | O | R | |||
| Sida spinosa | Prickly sida | i | O | V | V | ||
| Menispermaceae | Menispermum canadense | Moonseed | n | F | V | R | V |
| Mimosaceae | Desmanthus illinoensis | Illinois bundleflower | n | O,P | V | R | V |
| Schrankia nuttallii | Catclaw sensitive briar | n | P | R | R | ||
| Molluginaceae | Mollugo verticillata | Carpetweed | i | O | R | V | V |
| Monotropaceae | Monotropa hypopithys | Pinesap | n | F | V | ||
| Monotropa uniflora | Indian pipe | n | F | V | |||
| Moraceae | Maclura pomifera | Osage orange | i | F,O | V | V | R |
| Morus alba | White mulberry | i | F,O | V | R | V | |
| Morus rubra | Red mulberry | n | F | V | R | R | |
| Najadaceae | Najas guadalupensis | Southern naiad | n | A | V | ||
| Nyctaginaceae | Mirabilis albida | White four-o'clock | n | P | R | V | |
| Mirabilis nyctaginea | Wild four-o'clock | n | G,O | R | V | ||
| Oleaceae | Forsythia suspensa | Forsythia | i | O | R | ||
| Fraxinus americana | White ash | n | F | V | R | V | |
| Fraxinus pennsylvanica | Green ash | n | F | R | V | V | |
| Ligustrum sinense | Chinese privet | i | O | V | |||
| Syringa vulgaris | Lilac | i | O | R | |||
| Onagraceae | Circaea lutetiana ssp. canadensis | Enchanter's nightshade | n | F | V | V | |
| Epilobium coloratum | Narrowleaf willowherb | n | A | V | |||
| Gaura longiflora | Largeflower gaura | n | G,O,P | R | V | ||
| Gaura parviflora | Velvety gaura | n | O | V | R | ||
| Ludwigia palustris | Marsh seedbox | n | A | R | |||
| Oenothera biennis | Common eveningprimrose | n | O | V | R | ||
| Oenothera speciosa | Showy white eveningprimrose | n | O | R | V | ||
| Oenothera villosa | Hairy eveningprimrose | n | P | V | |||
| Stenosiphon linifolius | Stenosiphon | n | P | R | |||
| Ophioglossaceae | Botrychium dissectum | Cutleaf grapefern | n | F | V | V | |
| Botrychium virginianum | Rattlesnake fern | n | F | V | R | V | |
| Ophioglossum engelmannii | Limestone adder's-tongue | n | P | V | |||
| Orchidaceae | Corallorhiza odontorhiza | Late coralroot | n | F | V | ||
| Corallorhiza wisteriana | Wister's coralroot | n | F | V | |||
| Cypripedium calceolus var. pubescens | Yellow lady slipper | n | F | V | V | ||
| Galearis spectabilis | Showy orchid | n | F | V | |||
| Malaxis unifolia | Green adder's mouth | n | F | V | |||
| Platanthera praeclara | Western prairie fringed orchid | n | P | V | |||
| Spiranthes cernua | Nodding ladies'-tresses | n | G,O,P | R | |||
| Spiranthes ovalis | Oval ladies'-tresses | n | F | V | |||
| Spiranthes tuberosa | Little ladies'-tresses | n | F | V | |||
| Triphora trianthophora | Nodding pogonia | n | F | V | |||
| Oxalidaceae | Oxalis dillenii | Green wood sorrel | n | G,O,P | V | R | V |
| Oxalis stricta | Common wood sorrel | n | O | V | R | V | |
| Oxalis violacea | Violet wood sorrel | n | F,P | V | R | V | |
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