Dutchman's pipe cactus: Epiphyllum oxypetalum is also called Dutchman's Pipe cactus because of its curved tube. It is perhaps the most commonly seen of the Epiphyllum genus. Although it blooms better in smaller pots, it somewhat makes a more attractive houseplant before bloom.
Nightblooming cereus: It blooms rarely and only at night and the flowers wilt before dawn. Though it is sometimes referred to as a Nightblooming cereus, it is not closely related to any of the species in the tribe Cereeae, such as Selenicereus. It is more commonly known as nightblooming cereus. All Cereus species bloom at night and are terrestrial plants while all Epiphyllum species are usually epiphytic.