| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Apocynaceae | Vincetoxicum nigrum | Black Swallow-wort | Disturbed areas. | Native of Mediterranean Europe. Reported for many states in ne. United States, south to MD, KY, TN. |  |
| Apocynaceae | Vincetoxicum rossicum | Pale Swallow-wort | Disturbed areas, especially suburban woodlands. | Native of s. Europe. |  |
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