 = similar to phyllanthus.This species was among the first flat-stemmed species to be described, and the name recalls that it is similar to the first described flat-stemmed cactus "Cactus phyllanthus" today - "Epiphyllum phyllanthus".Some authors state that this plant first flowered in the garden of Château de Malmaison, belonging to the late Empress Joséphine de Beauharnais.