Pilosocereus floccosus Byles & G.D.Rowley in Cact. Succ. J. Gr. Brit. 19(3): 67. 1957 sec. Zappi & Taylor 2020
- ≡Pilocereus floccosus Backeb. & Voll in Arch. Jard. Bot. Rio de Janeiro 9: 150. 1949, nom. illeg., syn. sec. Taylor & Zappi 2004
- ≡Pseudopilocereus floccosus Buxb. in Beitr. Biol. Pflanzen 44: 252. 1968 syn. sec. Taylor & Zappi 2004
- =Cereus barbatus J.C.Wendl. ex Salm-Dyck, Cact. Hort. Dyck.: 29. 1841 syn. sec. Kew WCVP (2019)
- =Pilocereus barbatus Rebut ex Rümpler, Handb. Cacteenk., ed. 2: 650. 1885 syn. sec. Kew WCVP (2019)
