Pilocereus floccosus Backeb. & Voll in Arch. Jard. Bot. Rio de Janeiro 9: 150. 1949
Pilocereus floccosus in Arch. Jard. Bot. Rio de Janeiro 9: 150. 1949
is basionym for Pilosocereus floccosus in Cact. Succ. J. Gr. Brit. 19(3): 67. 1957
is basionym for Pseudopilocereus floccosus in Beitr. Biol. Pflanzen 44: 252. 1968