The barrel cactus is a type of cactus that is characterized by its round, barrel-like shape. It typically grows in arid regions of the southwestern United States and Mexico. These cacti can reach heights of up to 10 feet and are often covered in spines that provide protection from herbivores. Barrel cacti are known for their ability to store water, allowing them to survive in harsh desert conditions. They produce bright yellow or red flowers that bloom in the spring, attracting pollinators like bees and birds. The ferocactus is a common genus of barrel cactus, featuring several species with varying sizes and colors.