Genus Opuntia
Description of the genus and its species in the Sonoran Desert, Arizona. Includes illustrations.
Opuntia
Images and brief information on many species.
Opuntia
E-mail group for anyone interested in the propagation of cacti, especially the genus Opuntia.
Opuntia arenaria - Dune Pricklypear
Image, description, and range of this rare plant in New Mexico.
Opuntia humifusa
Species summary from the USDA Forest Service.
Opuntia leptocaulis - Desert Christmas Cactus
Images from Arizona.
Opuntia megasperma
Restoration efforts in the Galapagos.
Opuntia phaeacantha - Desert Prickly Pear
Images from Arizona.
Opuntia polycantha
Species summary from the USDA Forest Service.
Opuntia viridiflora - Santa Fe Cholla
Description, image, and range of this rare plant in New Mexico.
Prickly Pears and Chollas
Descriptions, ecology, and images.