Selenicereus undatus, the white-fleshed pitahaya, is a species of the genus Selenicereus (formerly Hylocereus) in the family Cactaceae and is the most cultivated species in the genus. It is used both as an ornamental vine and as a fruit crop, the pitahaya or dragon fruit.
Like all true cacti, the genus originates in the Americas. S. undatus is native from Mexico to Honduras; it may be a hybrid.
Night-blooming cereus is the common name referring to many flowering ceroid cacti that bloom at night. The flowers are short lived, and some of these species, such as Selenicereus grandiflorus, each flower blooms for a single night, though most put out multiple flowers over several weeks, each of which opens for only a single night. Other names for one or more cacti with this habit are nightblooming frivolous , princess of the night, Honolulu queen (for Hylocereus undatus), Christ in the manger, dama de noche, and queen of the night (which is also used for an unrelated plant species).
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