Mammillaria dioica Brandeg.

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: 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.