Ferocactus cylindraceus subsp. tortulispinus (H.E.Gates) N.P.Taylor in Cactaceae Consensus Init. 6: 16. 1998
Ferocactus cylindraceus subsp. tortulispinus in Cactaceae Consensus Init. 6: 16. 1998
is new combination for Ferocactus tortulispinus in Cact. Succ. J. (Los Angeles) 4: 343. 1933