Hymenocallis pimana is a member of the genus Hymenocallis, in the family Amaryllidaceae. Common name in English is Pima spider-lily; in Spanish it is cebollín. It is endemic to a small mountainous region in the Sierra Madre Occidental, straddling the Mexican states of Chihuahua and Sonora. Many of the people of the region are of the indigenous group known as the Mountain Pima or Pima Bajo.