Ferocactus recurvus subsp. greenwoodii (Glass) Pilbeam & Bowdery, Ferocactus: 91. 2005 sec. Pilbeam & Bowdery 2005
- ≡Ferocactus recurvus var. greenwoodii Glass in Cact. Succ. J. (Los Angeles) 40: 160. 1968 syn. sec. Pilbeam & Bowdery 2005
- =Ferocactus latispinus var. greenwoodii (Glass) N.P. Taylor in Bradleya 2: 27. 1984 syn. sec. Pilbeam & Bowdery 2005