The saguaro, (Carnegiea gigantea), is a large, tree-sized cactus species in the monotypic genus Carnegiea. It is native to the Sonoran Desert in the U.S. state of Arizona, the Mexican state of Sonora, and an extremely small area of California, U.S. The saguaro blossom is the state flower of Arizona. The common name saguaro came into the English language through the Spanish language, originating in the language of the… (More on Saguaro)