Pterocereus gaumeri (Britton & Rose) T. MacDoug. & Miranda Pterocereus gaumeri (Britton & Rose) T. MacDoug. & Miranda in Ceiba 4: 140. 1954 sec. Hunt 2016=Pachycereus gaumeri Britton & Rose, Cactaceae (Britton & Rose) 2: 71. 1920 syn. sec. Hunt 2016