The saguaro is a tree-like cactus species in the genus Carnegiea which can grow to be over 40 feet tall. It is native to the deserts of Arizona, Mexica and California. The saguaro blossom is the state wildflower of Arizona.
The giant saguaro, Carnegiea gigantea (Occasionally misspelled "Carnegia"), is long popular because of its immense size and unique architecture is, perhaps, the more famous of all cacti. It is the most well-known of a group of spectacular columnar cacti from the Sonoran Desert that includes the cardons, the organ-pipe cactus and senita. A saguaro's growth is extremely slow. After 15 years, the saguaro may be barely 30 cm tall tall. At about 30 years saguaros begin to flower and produce fruit. By 50 years-old the saguaro can be as tall as 2 m. After about 75 years on average, it may sprout its first branches, or "arms".