Selenicereus undatus

A climbing cactus native from Mexico to Honduras, it develops long three-angled green stems that root onto supports. Its exceptionally large, fragrant nocturnal flowers have broad white inner segments, narrow yellow-green outer segments, and numerous pale stamens. Each flower usually remains open for only one night. The edible fruits, known as dragon fruit, have red to pink skins and sweet white flesh containing many edible black seeds. It is cultivated as a fruit crop. Photographed in Colombia.