Ferocactus hamatacanthus is a barrel cactus in the genus Ferocactus of the family Cacteae. These cacti occur mainly in the Chihuahuan Desert.
Ferocactus hamatacanthus, known as Turk's head, is a medium sized barrel cactus with spines somewhat variable in number, diameter, and position, depending on origin. It is solitary, or double or triple branched after injury, occasionally even uninjured plants may form clusters with more than tree heads, particularly plants growing in rock crevices. This cactus blooms in late summer to autumn. Flowers open midday, partially close at night, and reopen again for several days. Plants start blooming when stems reach 15 cm high or less. Ferocactus hamatacanthus is a summer grower species. It is not too difficult to care for in a greenhouse, although it grows quite slowly.