Opuntia engelmannii subsp. flavispina (L.D.Benson) Guiggi in Cactology 3 (Suppl. II): 3. 2012
Opuntia engelmannii subsp. flavispina in Cactology 3 (Suppl. II): 3. 2012
is new combination for Opuntia phaeacantha var. flavispina in Cact. Succ. J. (Los Angeles) 46(2): 79. 1974