Matelea velutina (Schltdl.) Woodson Matelea velutina (Schltdl.) Woodson in Ann. Missouri Bot. Gard. 28: 234. 1941 sec. Juárez-Jaimes & al. 2007=Vincetoxicum velutinum (Schltdl.) Standl. in Contr. U.S. Natl. Herb. 23(4): 1189. 1924 syn. sec. The Plant List 2013