Gymnocalycium mihanovichii var. friedrichii Werderm. in Repert. Spec. Nov. Regni Veg. Sonderbeih. C 29: t. 113. 1936
Gymnocalycium mihanovichii var. friedrichii in Repert. Spec. Nov. Regni Veg. Sonderbeih. C 29: t. 113. 1936
is basionym for Gymnocalycium friedrichii in Friciana IV 23: 3. 1964