Ritterocactus uebelmannianus (Buining) Doweld in Sukkulenty 2(2): 23. 1999 Ritterocactus uebelmannianus (Buining) Doweld in Sukkulenty 2(2): 23. 1999is new combination for Notocactus uebelmannianus Buining in Kakteen And. Sukk. 19: 175. 1968Taxon for this nameRitterocactus uebelmannianus (Buining) Doweld