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.
EOL has data for 15 attributes, including: