Saguaro

Saguaro (Carnegiea gigantea) is a 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.

Description

The saguaro cactus grows as a column at a very slow rate, with all growth occurring at the tip, or apex, of the cactus. It takes up to 75 years to develop a side arm. The arms are grown to increase the plant's reproductive capacity, as more apices lead to more flowers and fruit.

Habitat

The saguaro 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 is a keystone species, and its disappearance would impact many other species.

Reproduction

The saguaro blossom is the state wildflower of Arizona. Its flowers are open for less than 24 hours. They can only be fertilized during this time, by a bat, bird, or insect.

Human usage

The saguaro has been used for food and building materials by Native American tribes like the Tohono O'odham. The ribs of the saguaro were used for construction and other purposes by Native Americans.

Threats

A significant threat to the saguaro's survival is habitat destruction due to urban development. Invasive species, like buffelgrass, are also a major threat.

See also

• Cactaceae
• Sonoran Desert
• Tohono O'odham

External links

• National Park Service: Saguaro
• Arizona-Sonora Desert Museum: Saguaro

Saguaro Resources
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