Ariocarpus bravoanus

Ariocarpus bravoanus is a cactus endemic to the Mexican state of San Luis Potosí, where it grows in dry shrubland on limestone gravel plains at elevations between 1500 and 2000 metres and is known from only a few localities in a fragmented habitat. It is a fleshy plant that grows geophytically, its gray-green body 3 to 9 centimetres across barely protruding from the soil surface, with flattened, triangular, somewhat pointed warts and magenta flowers 2.5 to 5 centimetres across. It was first described in 1992 by Héctor Manuel Hernández and Edward Frederick Anderson after being found while soil was being removed for another herbarium specimen, and its epithet honors the Mexican botanist and cactus collector Helia Bravo Hollis. The species is endangered because of overcollecting.