Ritterocactus horstii (F.Ritter) Doweld in Sukkulenty 3: 60. 2000
Ritterocactus horstii in Sukkulenty 3: 60. 2000
is new combination for Notocactus horstii in Succulenta (Netherlands) 45: 3. 1966
Ritterocactus horstii in Sukkulenty 3: 60. 2000
Taxon for this name