Ariocarpus sulcatus Schumann K. (1894) in Engler & Prantl
In: Nat. Pflanzenfam. 3, 6a:195
Roseocactus kotschoubeyanus (Lemaire) A. Berger
Origin: Mexico, This species is widely distributed as a large number of small, isolated populations in a big area extending over 600 km, from central Coahuila in the north to Queretaro in the south, and the species is also found in the states of Zacatecas, San Luis Potosi, Nuevo Leon and Tamaulipas.
Habitat and Ecology: Commonly called "living rocks," they are widely distributed as a large number of small, isolated populations, generally on limestone derived gypsum silt plains and on hills, at elevations of around 1000-1400 metres, The area where they grow must be quite wet during the rainy season (Summer). This plants are extremely cryptic and are very difficult to spot as they blend in well with the terrain around them resembling dried mud. When they are found, it is usually due to their pinkish flowers. In times of severe drought the whole above-ground portion of these plants can shrink and be covered by mould, but the taproot remains alive.
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