Mammillaria supertexta Pfeiff.

Solitary, body elongate, to 9.5 cm wide and 12.5 cm high, without milky sap. Tubercles prominent. Axils at first woolly. Central spines 2, 3 mm long, white, tips brown. Radial spines 14, 3-6 mm long, white. Flowers purplish red, to 1 cm long.

S 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.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Caryophyllanae
order      Caryophyllales
family       Cactaceae
genus        Mammillaria Haw.