Mammillaria dioica, commonly known as the Peninsular Pincushion cactus, is a small, globe-shaped cactus native to the Baja California peninsula and southern California. It grows up to 6-12 inches (15-30 cm) in height, forming clusters of stems. Thriving in arid desert climates with an optimal temperature range of 60°F to 85°F (16°C to 29°C), it is drought-tolerant but sensitive to frost, struggling in temperatures below 32°F (0°C). Propagated by seeds or offsets, it prefers well-drained, sandy soil with minimal watering. In spring, it produces small white to pinkish-red flowers, followed by edible red berries. It typically fruits within 5-10 years. As part of the Cactaceae family, it stores water in its spiny stems, which help it survive harsh desert conditions.