Gymnocalycium achirasense Gymnocalycium horridispinum var. achirasense Gymnocalycium monvillei var. echinatum Gymnocalycium monvillei var. orientale Gymnocalycium horridispinum subsp. achirasense Gymnocalycium achirasense subsp. chacrasense Gymnocalycium achirasense subsp. echinatum Gymnocalycium achirasense subsp. kainradliae Gymnocalycium achirasense var. orientale Gymnocalycium orientale Gymnocalycium orientale subsp. kainradliae Gymnocalycium monvillei var. chacrasense Gymnocalycium monvillei var. kainradliae Gymnocalycium achirasense var. chacrasense Gymnocalycium orientale var. vikulovii
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024