Stenocactus phyllacanthus (A.Dietr. & Otto) A.W.Hill

Body dark green. Ribs 25-60, spines 2-7 per areole. Flowers yellow with darker stripes.

C 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        Stenocactus (K.Schum.) Hill