Epiphyllum hookeri Haw. subsp. hookeri in Philos. Mag. Ann. Chem. 6: 108. 1829 sec. Hunt 2016
- =Phyllocactus hookeri (Haw.) Salm-Dyck, Cact. hort. Dyck: 38. 1842 syn. sec. Bauer 2003
- =Phyllocactus stenopetalus C.F. Först., Handb. Cacteenk.: 441. 1846 syn. sec. Bauer 2003
- =Phyllocactus strictus Lem. in Ill. Hort. 1: Misc. 107. 1854 syn. sec. Bauer 2003
- =Epiphyllum stenopetalum (C.F. Först.) Britton & Rose in Contr. U.S. Natl. Herb. 16: 259. 1913 syn. sec. Hunt 2016
- =Epiphyllum strictum (Lem.) Britton & Rose in Contr. U.S. Natl. Herb. 16: 259. 1913 syn. sec. Hunt 2016
- =Epiphyllum phyllanthus var. hookeri (Haw.) Kimnach in Cact. Succ. J. (Los Angeles) 36: 113. 1964 syn. sec. Bauer 2003
- =Epiphyllum phyllanthus subsp. hookeri (Haw.) U. Guzmán in Cactaceae Syst. Init. 16: 17. 2003 syn. sec. Bauer 2003