Cephalocereus columna-trajani (Karw. ex Pfeiff.) K. Schum., Nat. Pflanzenfam. [Engler & Prantl] 3(6a): 182. 1894 sec. Hunt 2016
- ≡Cereus columna-trajani Karw. ex Pfeiff., Enum. Diagn. Cact.: 76. 1837 syn. sec. Guzmán & al. 2003
- =Cephalophorus columna-trajani (Karw. ex Pfeiff.) Lem., Cact. aliq. nov.: XII. 1838 syn. sec. Guzmán & al. 2003
- =Pilocereus columna-trajani (Karw. ex Pfeiff.) Lem., Cact. Gen. Sp. Nov.: 9. 1839 syn. sec. Guzmán & al. 2003
- =Pilocereus hoppenstedtii F.A.C. Weber, Cat. Pfersdorff. 1864 syn. sec. Guzmán & al. 2003
- =Cephalocereus hoppenstedtii (F.A.C. Weber) K. Schum., Nat. Pflanzenfam. [Engler & Prantl] 3(6a): 181. 1894 syn. sec. Guzmán & al. 2003
- =Cereus hoppenstedtii (F.A.C. Weber) A. Berger in Rep. (Annual) Missouri Bot. Gard. 16: 70. 1905 syn. sec. Guzmán & al. 2003
- =Pachycereus columna-trajani (Karw. ex Pfeiff.) Britton & Rose in Contr. U.S. Natl. Herb. 12: 421. 1909 syn. sec. Tapia & al. 2017
- =Haseltonia hoppenstedtii (F.A.C. Weber) Backeb. in Blätt. Sukkulentenk. 1: 3. 1949 syn. sec. Guzmán & al. 2003
- =Haseltonia columna-trajani (Karw. ex Pfeiff.) Backeb., Cactaceae (Backeberg) 4: 2263. 1960 syn. sec. Guzmán & al. 2003