Gymnocalycium ragonesei(or G. anisitsii)
Gymnocalycium ragonesei has a very restricted range in Catamarca (and Cordoba?), Argentina. It grows at low elevation of 100 to 200(-400) meters above sea level, semi-buried at the edge of saline grasslands. The major threat for this species is illegal collection.
Species: G. ragonesei
Binomial name: Gymnocalycium ragonesei – Wikipedia.