Close up view of flowers and buds on a Buckhorn Cholla Cactus (aka Buck-horn cholla aka major cholla aka yellow-flowered cane cactus) in the Sonoran Desert, McDowell Sonoran Preserve, Scottsdale, Arizona, USA, April 2014. Scientific name Opuntia acanthoca

Close up view of flowers and buds on a Buckhorn Cholla Cactus (aka Buck-horn cholla aka major cholla aka yellow-flowered cane cactus) in the Sonoran Desert, McDowell Sonoran Preserve, Scottsdale, Arizona, USA, April 2014. Scientific name Opuntia acanthocarpa aka Cylindropuntia acanthocarpa. These cacti grow from three to fifteen feet tall and can have yellow, orange, pink or red flowers, all of which usually contain dark red anther-bearing filaments. This plant has yellow flowers streaked with pink. Family Cactaceae