Ferocactus uncinatus var. wrightii (Engelm.) N.P.Taylor in Cact. Succ. J. Gr. Brit. 41: 31. 1979
Ferocactus uncinatus var. wrightii in Cact. Succ. J. Gr. Brit. 41: 31. 1979
is new combination for Echinocactus uncinatus var. wrightii in Proc. Amer. Acad. Arts 3: 272. 1856