Pilocereus gaumeri (Britton & Rose) F.M.Knuth, Kaktus-ABC: 330. 1936 ["1935"] Pilocereus gaumeri (Britton & Rose) F.M.Knuth, Kaktus-ABC: 330. 1936 ["1935"]is new combination for Cephalocereus gaumeri Britton & Rose, Cactaceae 2: 47. 1920Taxon for this namePilocereus gaumeri (Britton & Rose) F.M.Knuth