The saguaro cactus is a keystone species of the Sonoran Desert, providing food and habitat to numerous species and serving as a cultural symbol of the American Southwest.
Key Facts
- Maximum height
- Over 12 meters (40 feet)
- Lifespan
- Often exceeds 150 years
- First side arm growth
- Around 75–100 years of age
- Elevation range
- Sea level to up to 5,000 feet
- Protected area established
- Saguaro National Park, 1933
- State wildflower of
- Arizona
By the Numbers
Location
Cause → Event → Consequence
Adapted to the arid conditions of the Sonoran Desert over millennia, the saguaro evolved water-storage capabilities and a slow growth rate that allow it to thrive in low-rainfall environments. Its range is largely constrained by freezing temperatures, limiting it to Arizona, Sonora (Mexico), and small parts of California.
Carnegiea gigantea, the saguaro, is a tree-like cactus and the sole species in its genus, capable of growing over 12 meters tall. It stores large volumes of rainwater in its expandable trunk, grows arms to increase reproductive capacity, and provides food and nesting sites for a wide variety of desert wildlife and indigenous peoples.
Because of its ecological importance as a keystone species and its cultural significance to groups such as the Tohono O'odham and Pima, the saguaro gained federal protection through Saguaro National Park in 1933. It remains an iconic symbol of the American Southwest and Mexican desert culture, appearing widely in art and film.