.
| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|
| Anacardiaceae | Toxicodendron radicans var. negundo | Midwestern Poison Ivy | In a wide range of habitats, including mesic forests, rock outcrops, open areas, and disturbed ground. | NY west to MI, MN, and NE, south to sw. VA, KY, AR, and TX, almost entirely in or west of the Appalachians. | 
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| Anacardiaceae | Toxicodendron radicans var. pubens | | Xeric limestone woodlands, barrens, outcrops, and clearings. | S. IL and MO south to se. LA and s. TX; disjunct eastward in c. KY, c. TN, and w. VA (Virginia Botanical Associates 2019). | 
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| Anacardiaceae | Toxicodendron radicans var. radicans | Eastern Poison Ivy | In a wide range of habitats, including mesic forests, rock outcrops, swamp forests, brackish marshes, open areas, disturbed ground, usually in more mesic to hydric sites than T. pubescens, and particularly common in areas with fertile soils, such as bottomlands or over calcareous rocks or calcareous sands (as in maritime forests). | NS south to s. FL (and the Bahamas), west to e. TX, inland to VT, c. PA, WV, KY, and AR. | 
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| Anacardiaceae | Toxicodendron radicans var. verrucosum | Texas Poison Ivy | On limestone, in uplands. | OK south to c. TX. | 
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