Ritterocactus herteri (Werderm.) Doweld in Sukkulenty 2(2): 22. 1999 Ritterocactus herteri (Werderm.) Doweld in Sukkulenty 2(2): 22. 1999is new combination for Echinocactus herteri Werderm. in Revista Sudamer. Bot. 3(4/6): 143. 1936Taxon for this nameRitterocactus herteri (Werderm.) Doweld