Ritterocactus mueller-melchersii (Frič ex Backeb.) Doweld in Sukkulenty 2(2): 22. 1999
Ritterocactus mueller-melchersii in Sukkulenty 2(2): 22. 1999
is new combination for Notocactus mueller-melchersii, Kaktus-ABC: 415. 1936 ["1935"]
Ritterocactus mueller-melchersii in Sukkulenty 2(2): 22. 1999
Taxon for this name