A solitary cactus. It can also form clumps 1 m wide. It is bluish-green and round. It is soft fleshed. It is 5-8 cm wide. They have turnip-like roots. The bodies do not have spines. There are 7-8 ribs or furrows across them. The pits have brush-like tufts of hair. The flowers are small and white, pink or yellow. They are 1.2-2.5 cm across.