a variety of cactus has several common names: Dutchman's Pipe cactus Jungle Cactus Jungle Cactus Lady of the Night or Queen of the Night. This cactus blooms nocturnally or Queen of the Night. This cactus blooms nocturnally and its flowers wilt before dawn. Though it is sometimes referred to as a night-blooming cereus and its flowers wilt before dawn. Though it is sometimes referred to as a night-blooming cereus Genus Epiphyllum Species E Oxypetalum.