Pholisma
 The genus Pholisma (Nutt. ex Hook.) consists of three to five species of desert-dwelling primarily subterranean plants. Most notable of the genus is Pholisma sonorae native to the Southwestern United States and Mexico. The species is without chlorophyll and lives as a parasite on the roots of a number of desert species. Pholisma belongs to the family Boraginaceae. Other species include Pholisma arenarium the desert Christmas tree.