Opuntia phaeacantha var. flavispina L.D.Benson in Cact. Succ. J. (Los Angeles) 46(2): 79. 1974
Opuntia phaeacantha var. flavispina in Cact. Succ. J. (Los Angeles) 46(2): 79. 1974
is basionym for Opuntia engelmannii var. flavispina in MadroƱo. 35: 348. 1988
is basionym for Opuntia engelmannii subsp. flavispina in Cactology 3 (Suppl. II): 3. 2012