One of the largest plants of the genus, it can reach up to 5 cm in diameter and 2 cm in height. This globular cactus, depressed at the apex, cluster at the base, forming new suckers. Its green stem is covered with white downy areoles, from which numerous and thin amber yellow spines protrude. It blooms with yellow tubular-shaped flowers, that open up during the day. It is a slow-growing plant, but at the same time it is easy to grow, which makes it perfect even for beginners.