Mark Hyde, Bart Wursten and Petra Ballings   cc-by-nc

Cynanchum (Swallow Wort) is a genus of herb in the family Apocynaceae. They are climbers. They are native to U.S. Virgin Islands, The Contiguous United States, and Puerto Rico. Flowers are visited by Byturus and Sphegocephala angavokeliensis. Individuals can grow to 25 m.

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EOL has data for 15 attributes, including:

Known occurrences, collected specimens and observations of swallow-wort. View this species on GBIF