<Li> Pilocereus engelmannii Lem . </Li> <Li> Pilocereus giganteus Rumpler </Li> <P> The saguaro (/ səˈwɑːroʊ /, Spanish pronunciation: (saˈɣwaɾo)) (Carnegiea gigantea) is an arborescent (tree - like) cactus species in the monotypic genus Carnegiea, which can grow to be over 40 feet (12 m) tall . It is native to the Sonoran Desert in Arizona, the Mexican State of Sonora, and the Whipple Mountains and Imperial County areas of California . The saguaro blossom is the state wildflower of Arizona . Its scientific name is given in honor of Andrew Carnegie . In 1994, Saguaro National Park, near Tucson, Arizona, was designated to help protect this species and its habitat . </P> <P> The image of the saguaro is indelibly linked with that of the American Southwest, especially in western films . The common name saguaro came into the English language through the Spanish language, originating in the Mayo language . </P>

What are the giant cactus called in arizona