Body mostly to 10 cm wide, grey-green to brownish. Tubercles deeply fissured and wrinkled with a felted groove above. Flowers magenta.

NE Mexico

 

Ariocarpus kotschoubeyanus (Lem.) K. Schum. comes from E & NE Mexico; the other species with a tubercular groove is generally smaller and darker green without the deep tubercular furrowing.

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.