Clustering, body elongate, 1-3 cm wide. Tubercles prominent. Axils bare. Central spines 0(-1). Radial spines 15-20, whitish to yellow or brown, radiating evenly or erect. Flowers pale to deep yellow, 1 cm long and wide. Fruit red. [M. echinaria DC.]

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.