Body solitary, more or less spherical. Ribs to about 20 with low tubercles. Central spines 4-7, the lowermost flattened, hooked or twisted. Flowers purplish. Fruit yellow or tinged red.
NW Mexico
Source: (1997). Cactaceae. In: . Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.
