Epiphyllum thomasianum is an epiphytic species of cactus native to Colombia, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua and Panamá.[1]
The vegetative morphology closely resembles Epiphyllum oxypetalum. The flowers differ due to their striking golden stamina.
Currently two subspecies are recognised: Epiphyllum thomasianum subsp. costaricense and Epiphyllum thomasianum subsp. thomasianum.[2] [3]