Gymnocalycium ritterianum Rausch in Kakteen And. Sukk. 23(7): 180. 1972
Gymnocalycium ritterianum in Kakteen And. Sukk. 23(7): 180. 1972
is correct spelling for Gymnocalycium riteranum in Kakteen And. Sukk. 23: 180. 1972
Gymnocalycium ritterianum in Kakteen And. Sukk. 23(7): 180. 1972