Ritterocereus standleyi (G.J.Ortega) Backeb. in Cactaceae (Berlin) 1941(2): 48. 1942 Ritterocereus standleyi (G.J.Ortega) Backeb. in Cactaceae (Berlin) 1941(2): 48. 1942is new combination for Lemaireocereus standleyi J.G.Ortega in Rev. Mex. Biol. 7(5): 121. 1927Taxon for this nameRitterocereus standleyi (G.J.Ortega) Backeb.