Marsdenia astephanoides (A. Gray) Woodson in Ann. Missouri Bot. Gard. 28: 244. 1944 sec. Juárez-Jaimes & al. 2007
- ≡Vincetoxicum astephanoides A. Gray in Proc. Amer. Acad. Arts 22: 435. 1887 syn. sec. The Plant List 2013
- =Cynanchum astephanoides (A. Gray ex S. Watson) Standl. in Contr. U.S. Natl. Herb. 23(4): 1177. 1924 syn. sec. ???