Clustering, body spherical to about 10 cm tall. Axils naked. Central spine 1. Radial spines 10–15. Flowers pink; summer. Fruit scarlet.

SW North America &N Mexico

Source: Thompson, A, ; Forbes, S.; Spencer, R. (1997). Cactaceae. In: Spencer, R.. 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.