This member of the Cactaceae family was described by Hooker in 1848. It's from the north and central of Mexico. Well-drained soil, some water and light shade to full sun. The stem (almost caudex) grows to 20 centimetres in diameter and it reaches for 80 centimetres. The flowers are yellow, and it can also be reproduced by cuttings. I found mine in Roskilde in 2003.