Native to Brazil. Sun exposure: Requires full sun to filtered sun. Hardiness: keep above 4.5 °C (40 °F) Bloom color: The flowers are bright yellow, rather large compared to the rest of the plant. Hardiness: Hardy to 25°F. Full sun to light shade. Keep dry winter.
They have the ability to hide in the soil when not enough water around. Once sufficient moisture is available the plant swells and is again visible on the top of the soil.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz
