Ferocactus recurvus (Mill.) Borg Ferocactus recurvus (Mill.) Borg, Cacti (Borg): 231. 1937 sec. Guzmán & al. 2003≡Cactus recurvus Mill., Gard. Dict. (ed. 8): CAC. 1768 syn. sec. Guzmán & al. 2003