Epidendrum longicaule (L.O. Williams) L.O. Williams Epidendrum longicaule (L.O. Williams) L.O. Williams in Fieldiana, Bot. 31(2): 39. 1964 sec. Soto-Arenas & al. 2007≡Ionopsis longicaulis L.O. Williams in Brittonia 14: 443. 1962 syn. sec. Soto-Arenas & al. 2007