Ritterocactus langsdorfii subsp. pulvinatus (Vliet) Doweld in Sukkulenty 3: 60. 2000 Ritterocactus langsdorfii subsp. pulvinatus (Vliet) Doweld in Sukkulenty 3: 60. 2000is new combination for Notocactus pulvinatus Vliet in Succulenta (Netherlands) 49: 50. 1970Taxon for this nameRitterocactus langsdorfii subsp. pulvinatus (Vliet) Doweld