Ruehssia stevensiana (Juárez-Jaimes) L.O. Alvarado Ruehssia stevensiana (Juárez-Jaimes) L.O. Alvarado in Phytoneuron 47: 16. 2021 sec. Alvarado-Cárdenas & al. 2021≡Marsdenia stevensiana Juárez-Jaimes in Novon 24(2): 170, f. 1. 2015 syn. sec. ???