Ruehssia coulteri (Hemsl.) L.O. Alvarado Ruehssia coulteri (Hemsl.) L.O. Alvarado in Phytoneuron 47: 13. 2021 sec. Alvarado-Cárdenas & al. 2021≡Marsdenia coulteri Hemsl., Biol. Cent.-Amer., Bot. 2(11): 336-337. 1882 syn. sec. ???