Ferocactus cylindraceus var. tortulispinus (H.E.Gates) Bravo in Cact. Suc. Mex. 25: 65. 1980
Ferocactus cylindraceus var. tortulispinus in Cact. Suc. Mex. 25: 65. 1980
is new combination for Ferocactus tortulispinus in Cact. Succ. J. (Los Angeles) 4: 343. 1933