Sulcorebutia steinbachii subsp. markusii (Rausch) Gertel & J.de Vries in Cactus & Co. 8(3): 189. 2004
Sulcorebutia steinbachii subsp. markusii in Cactus & Co. 8(3): 189. 2004
is new combination for Sulcorebutia markusii in Kakteen And. Sukk. 21(6): 103–104. 1970