◊ Willdenowia 46:157 (2016) ◊◊ Heliocereus heterodoxus Standl&Steyerm - Field. Mus. Nat. Hist. 23 (1944) - Ribs flattened, at the base with 3-5 ribs. - Guatemala: Quezaltenango; Mexico: Chiapas. KuaS 24():273-275 EPIG 8(3):95', 10(2):48