Quite a large clump of this cactus.
Small area below Lone Grapevine Spring (sq mile) has a lot of these cholla
Riverside County, California, US
Seen along the main trail.
The plant observed here is about 80 cm high. This species does not usually occur in central Arizona, but can be found in the Sonoran Desert in Yuma and Mojave Counties; it is also found in northern Mexico
Clark County, Nevada, US
San Diego County, California, US