Saguaro cactus 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, a small part of Baja California in the San Felipe Desert and an extremely small area of California, U.S. These cactus, some as tall as 50 feet and as heavy as 8 tons, are one of the greatest symbols of America's wild deserts.
The Saguaro Cactus has a surprisingly shallow root system ,considering its great height and weight. It is supported by a tap root that is only a pad about 3 feet long, as well as numerous stout roots no deeper than a foot, emanating radially from its base. The slow growth and great capacity of the Saguaro to store water allow it to flower every year, regardless of rainfall. Like most cactus, saguaro cactus's bud appear on the southeastern exposure of stem tips, and flowers may completely encircle stems in a good year.
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