Pilosocereus leucocephalus, called old man cactus (along with a number of similar species), old man of Mexico, tuno, and woolly torch, is a species of
cactus in the genus Pilosocereus, native to Mexico and Central America.[2] It has gained the
Royal Horticultural Society's
Award of Garden Merit.[3]Pilosocereus leucocephalus functions as a
keystone species in dry landscapes found in Mesoamerica. The fruit this cactus produces is relied upon as a source of hydration and sugar in arid areas by frugivores such as birds, bats, and even some reptiles.[4]
References
^Pilosocereus (Cactac.) Gen. Revis. Ampl.: 119 (1994)