Gymnocalycium pflanzii var. riograndense (Cárdenas) Donald in Natl. Cact. Succ. J. 26: 100. 1971
Gymnocalycium pflanzii var. riograndense in Natl. Cact. Succ. J. 26: 100. 1971
is new combination for Gymnocalycium riograndense in Kakteen And. Sukk. 9(2): 24. 1958