Apocynum cannabinum L. Apocynum cannabinum L., Sp. Pl. 1: 213. 1753 sec. Juárez-Jaimes & al. 2007=Echites revolutus Sessé & Moc., Pl. Nov. Hisp.: 28. 1888 syn. sec. ???=Cynopaema cannabinum (L.) Lunell in Amer. Midl. Naturalist 4: 509. 1916 syn. sec. ???