Echinocactus is a genus of large, rounded cacti native mainly to Mexico and the southwestern United States. Often recognised by their barrel-shaped bodies, pronounced ribs and strong spines, these plants develop a distinctive presence as they mature. Some species produce yellow, red or orange flowers, while others are admired for their impressive size and longevity. Their classic desert appearance makes Echinocactus a familiar and enduring part of many cactus collections.