Solitary or occasionally clustering, body elongate, to 3 cm wide and 4 cm high, without milky sap. Tubercles usually obscure, conical. Axils sparsely woolly. Central spines lacking. Radial spines 22-30, 2 mm long, white (and contrasting with golden areole), feathery. Flowers pink to violet-purple, 3.5-4.5 cm long and 3.5 cm wide. Fruit embedded in body.

NW 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.