Please note that the Museum will be closing at noon on Tuesday, August 12, 2025 for a staff appreciation event.

This scene contains all three columnar cacti that occur in the United States. Senita (Lophocereus schottii) is on the left, organ pipe cactus (Stenocereus thurberi) in the middle, and saguaro (Carnegiea gigantea) on the right. Senita Basin, Organ Pipe Cactus National Monument, Arizona.


Silhouette Icon
CESD Homepage Regional Natural History and Image Galleries Desert in Bloom Articles from sonorensis Desert Tortoises Our Exhibits Info for kids Common Questions