The Saguaro Cactus, found in South-western United States does not grow branches until it is 75 years old.
The saguaro (pron.: /səˈwɑroʊ/; scientific name Carnegiea gigantea) is a large, tree-sized cactus species in the monotypic genus Carnegiea, which can grow to be over 20 meters (~70 ft) tall. It is native to the Sonoran Desert in the U.S. state of 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.
