Wislizenia refracta, common names jackass-clover or spectacle fruit, is one of three recognized species in its genus Wislizenia, although some authors have suggested considering them as subspecies. Wislizenia refracta is native to northwestern Mexico and the southwestern United States. It has been reported from Chihuahua, Sonora, trans-Pecos Texas, New Mexico, Arizona, Utah, Nevada and from California (Riverside, Kern and San Bernardino Counties). The species occurs in sandy flats, in desert scrub, and on disturbed sites such as roadsides. Wislizenia refracta is an annual herb up to 200 cm (78. 5 in) tall. Leaves are trifoliate, the leaflets ovate (egg-shaped), up to 5 cm (2 in) long. Flowers are yellow.