Echinocereus fendleri subsp. fendleri sec. Guzmán Cruz & al. 2003
- =Cereus fendleri var. pauperculus Engelm. in Mem. Amer. Acad. Arts n.s., 4: 51. 1849 syn. sec. Guzmán Cruz & al. 2003
- ≡Echinocereus fendleri var. pauperculus (Engelm.) G.Unger in Echinocereenfreund 7: 87. 1994 syn. sec. Guzmán Cruz & al. 2003
- =Echinocereus hempelii Fobe in Monatsschr. Kakteenk. 7: 187. 1897 syn. sec. ???
- ≡Cereus hempelii (Fobe) Mottet, Dict. Prat. Hort. 5: 739. 1898–1899 syn. sec. Sánchez & al. 2018
- ≡Echinocereus fendleri subsp. hempelii (Fobe) W.Blum, Echinocereus Monogr.: 2. 1998 syn. sec. Hunt 2016
- =Cereus cinerascens var. fendleri Bois, Pl. Aliment. 2: 371. 1928 syn. sec. Blum & al. 1998
- =Echinocereus albiflorus Weing. in Kakteenkunde 1933: 156. 1933 syn. sec. Guzmán Cruz & al. 2003
- ≡Echinocereus fendleri var. albiflorus (Weing.) Backeb., Cactaceae 4: 2047. 1960 syn. sec. Guzmán Cruz & al. 2003
- =Echinocereus kuenzleri Castetter, P.Pierce & K.H.Schwer. in Cact. Succ. J. (Los Angeles) 48: 77. 1976 syn. sec. Guzmán Cruz & al. 2003
- ≡Echinocereus fendleri var. kuenzleri (Castetter, P.Pierce & K.H.Schwer.) L.D.Benson, Cacti U. S. Canada: 942. 1982 syn. sec. Guzmán Cruz & al. 2003
- ≡Echinocereus fendleri subsp. kuenzleri (Castetter, P.Pierce & K.H.Schwer.) W.Blum & D.Felix in Echinocereus Online-J. 2(2): 105. 2014 syn. sec. Kew WCVP (2019)