Gymnocactus horripilus (Lem. ex C.F.Först.) Backeb. in Cact. Succ. J. (Los Angeles) 23: 151. 1951 Gymnocactus horripilus (Lem. ex C.F.Först.) Backeb. in Cact. Succ. J. (Los Angeles) 23: 151. 1951is new combination for Echinocactus horripilus Lem. ex C.F.Först., Handb. Cacteenk.: 283. 1846Taxon for this nameGymnocactus horripilus (Lem. ex C.F.Först.) Backeb.