Body solitary or clustering, spherical to cylindrical, mostly waxy blue. Ribs 10-35 or so. Spines mostly 4-6 of more or less equal length, yellow. Flowers yellow. Fruit whitish to yellowish and with yellow scales.

E 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.