Sulcorebutia steinbachii subvar. polymorpha (Cárdenas) Gertel in Inform.-brief Freundeskreis Echinopseen 22: 26. 1996
Sulcorebutia steinbachii subvar. polymorpha in Inform.-brief Freundeskreis Echinopseen 22: 26. 1996
is new combination for Rebutia polymorpha in Kakteen And. Sukk. 16(6): 115–116. 1965