Barrel cactus in full bloom with yellow flowers.
This cactus is round and resembles a spherical watermelon. It has spikes around it and they grow in clumps.
Blooming barrel cactus on rocky south facing hill.
Ferocactus cylindraceus is a species of barrel cactus which is known by several common names, including California barrel cactus, Desert barrel cactus, and miner's compass. It was first described by George Engelmann in 1853.