Pilosocereus monoclonos (DC.) Byles & G.D.Rowley in Cact. Succ. J. Gr. Brit. 19(3): 67. 1957 Pilosocereus monoclonos (DC.) Byles & G.D.Rowley in Cact. Succ. J. Gr. Brit. 19(3): 67. 1957is new combination for Cereus monoclonos DC., Prodr.: 464. 1828Taxon for this namePilosocereus monoclonos (DC.) Byles & G.D.Rowley