The Saguaro reference article from the English Wikipedia on 24-Jul-2004
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Saguaro

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Saguaro
Status Endangered
Saguaro
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Caryophyllales
Family Cactaceae
Genus Carnegiea
Species gigantea
Binomial name
Carnegiea gigantea

Saguaro (Carnegiea gigantea) is a large, tree-sized cactus that is native to the Sonoran Desert in the southwestern United States and northern Mexico.

Saguaros are slow growing, taking up to 75 years to reach the point where they will develop a side shoot. They also live for about 200 years. They bloom in April or May. Many animals, such as the Cactus Wren, make burrows in saguaros. In addition to being slow growing, they are slow at propagating. These two facts combine to place the saguaro on the endangered species list. Harming one in any manner (including cactus plugging) is illegal, and when houses or highways are built, special precautions must be taken to move every saguaro affected.

The ribs of the saguaro are used for construction and other purposes by Native Americans of the region. A fine example can be seen in the roofing of the cloisters of the Mission San Xavier del Bac on the Tohono O'odham lands near Tucson, Arizona

Saguaro BlossomEnlarge

Saguaro Blossom