Opuntia engelmannii subsp. flavispina (L.D. Benson) Guiggi in Cactology 3(Suppl. 2): 3. 2012 sec. Guiggi 2012
- ≡Opuntia phaeacantha var. flavispina L.D. Benson in Cact. Succ. J. (Los Angeles) 46: 79. 1974 syn. sec. Guiggi 2012
- =Opuntia engelmannii var. flavispina (L.D. Benson) B.D. Parfitt & Pinkava in Madroño 35: 348. 1988 syn. sec. Guiggi 2012