(Epiphyllum ackermanii)
Orchid cactus is an English name for a plant which may refer to Epiphyllum hybrid, one of a number of hybrid cacti formed by crosses between Disocactus, Pseudorhipsalis, Selenicereus and Epiphyllum; often collectively called "epiphyllums" or "epis"Epiphyllum, one or more of the species of this genus.Disocactus -hybridus, a hybrid cactus often incorrectly called Disocactus ackermannii