Gymnocalycium gaponii subsp. geyeri Gymnocalycium erinaceum var. paucisquamosum Gymnocalycium gaponii Gymnocalycium papschii Gymnocalycium bruchii var. papschii Gymnocalycium capillense var. gaponii Gymnocalycium pinalii Gymnocalycium gaponii subsp. macrocarpum
World Flora Online, accessed June 20, 2024