Gymnocalycium proliferum var. calochlorum (Boed.) Backeb., Kaktus-ABC: 295. 1936 ["1935"]
Gymnocalycium proliferum var. calochlorum, Kaktus-ABC: 295. 1936 ["1935"]
is new combination for Echinocactus calochlorus in Monatsschr. Deutsch. Kakteen-Ges. 4: 260. 1932