Synonyms: Apocynum rectinerve (homotypic); Blepharodon adenopogon; Blepharodon bracteatus; Blepharodon decaisnei; Blepharodon diffusum; Blepharodon longipedicellatus; Blepharodon nitidum; Blepharodon nodosus; Blepharodon ornatus; Blepharodon pallidum var. ellipticum; Blepharodon pallidus; Blepharodon spruceanus; Blepharodon steudelianum; Blepharodon steyermarkii; Blepharodon venezuelense; Blepharodon venezuelensis; Cynanchum nitidum; Cynanchum pictum (homotypic); Marsdenia picta (homotypic); Metastelma steudelianum