Pilocereus collinsii (Britton & Rose) F.M.Knuth, Kaktus-ABC: 330. 1936 ["1935"] Pilocereus collinsii (Britton & Rose) F.M.Knuth, Kaktus-ABC: 330. 1936 ["1935"]is new combination for Cephalocereus collinsii Britton & Rose, Cactaceae 4: 269–270, f. 242. 1923Taxon for this namePilocereus collinsii (Britton & Rose) F.M.Knuth