Cereus pachanoi (Britton & Rose) Werderm. in Backeberg, Neue Kakteen: 73. 1931 Cereus pachanoi (Britton & Rose) Werderm. in Backeberg, Neue Kakteen: 73. 1931is new combination for Trichocereus pachanoi Britton & Rose, Cactaceae 2: 134. 1920Taxon for this nameCereus pachanoi (Britton & Rose) Werderm.