Opuntia polyacantha var. nicholii (L.D.Benson) B.D.Parfitt in Cact. Succ. J. (Los Angeles) 70(4): 188. 1998
Opuntia polyacantha var. nicholii in Cact. Succ. J. (Los Angeles) 70(4): 188. 1998
is new combination for Opuntia nicholii, Cacti Ariz., ed. 2: 48–50. 1950
Opuntia polyacantha var. nicholii in Cact. Succ. J. (Los Angeles) 70(4): 188. 1998