Notocactus winkleri Vliet in Succulenta (Netherlands) 54: 136. 1975
Notocactus winkleri in Succulenta (Netherlands) 54: 136. 1975
is basionym for Ritterocactus mueller-melchersii subsp. winkleri in Sukkulenty 2(2): 23. 1999
is basionym for Notocactus mueller-melchersii var. winkleri in Internoto 25: 112. 2004
is basionym for Notocactus mueller-melchersii subsp. winkleri in Cact.-Avent. Int. 98(Suppl.): 8. 2013
is basionym for Parodia mueller-melchersii subsp. winkleri in Cactaceae Consensus Init. 6: 11. 1998