Gymnocalycium quehlianum var. calochlorum (Boed.) H.Till & Amerh. in Gymnocalycium 20: 729. 2007
Gymnocalycium quehlianum var. calochlorum in Gymnocalycium 20: 729. 2007
is new combination for Echinocactus calochlorus in Monatsschr. Deutsch. Kakteen-Ges. 4: 260. 1932