Body simple or clustering, cylindrical to columnar. Axils bristly. Central spines 3-4, one larger than the others, tip hooked. Radial spines 11-22, pale. Flowers creamy yellow. Fruit scarlet.
NW Mexico & SW North America
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.