Freely clustering, mounding, body globular to 8 cm wide. Tubercles prominent, angular. Axils bearing wool and bristles, central spines 2-6 whitish or pale brownish unequal radial spines 2-7 mm long, occasionally with 1-3 short additional spines. Flowers purplish-red, 1.5 cm wide. Fruit red.
C 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.
Mammillaria compressa 'Rubispina'
Has long upstanding spines reddish brown in upper third.