DetailsHylocereus undatus, known as dragon fruit or pitahaya, is a species of the genus Cactaceae originating in the Americas. It is grown ornamentally and as a crop for its edible fruit. Hylocereus undatus grows as a sprawling terrestrial or epiphytic cactus. They climb by use of aerial roots, growing on rocks and trees. They are closely related to Selenicereus. Easily cultivated and fast growing, it should be kept above 50°F in winter.