Acanthocereus haackeanus Backeb. ex Lodé in Int. Cact. Advent. 111-112: 66. 2016 sec. Kew WCVP (2019)
- ≡Peniocereus haackeanus Backeb., Descr. Cact. Nov. 3: 12. 1963 syn. sec. Kew WCVP (2019)
- –Neoevansia haackeana (Backeb.) Sánchez-Mej. in Cact. Suc. Mex. 18: 24. 1973, nom. inval., syn. sec. Kew WCVP (2019)
- –Neoevansia haackiana (Backeb.) Sánchez-Mej. in Cact. Suc. Mex. 18: 24. 1973, nom. inval., syn. sec. TROPICOS 1988+