Also known as Mother in Law's cushion these are large, rounded cactus with golden yellow gently curved spines. Bright yellow flowers appear in late spring through mid summer. Heat and drought tolerant. They thrive in full sun and need little water making them a great addition to any native landscape. They can grow to be 2-3 feet tall with a 3-4 foot spread. This cactus grows best in zones 9-11. Be sure to wear gloves with handling this golden beauty.