1. Cholla
2. Prickly Pear pad
3. Prickly Pear pad
4. A tiny pincushion cactus grows in the shade of a prickly pear pad
5. Hooked spines on a large barrel cactus
6. A bright green lichen growing on a rock in full sun
7. Looking across the desert toward Tucson from Saguaro East
8. A Teddy Bear Cholla
9. Organ Pipe cactus in the Arizona-Sonora Desert Museum
11. Ocotillo