The Golden Barrel Cactus, Echinocactus grusonii, is a well-known and widely cultivated cactus, famed for its spherical, ribbed shape and golden-yellow spines. Native to Mexico, it's a slow-growing plant, often used in xeriscaping and as a striking feature in rock gardens or as a houseplant. Mature plants can produce yellow flowers at the crown, but this is rare in younger plants. The Golden Barrel is drought-tolerant, requiring minimal water and thriving in full sunlight with well-draining soil.