Hamatocactus hamatacanthus ssp. sinuatus (Turk's Head).  Syn: Echinocactus hamatacanthus / Ferocactus hamatacanthus. USDA: 8b-11. Full sun. Heat tolerant. Little or no water. Hardy to 16°F. Grows to 2' cluster. Origin: Texas, Mexico

Hamatocactus hamatacanthus v. davisii

Hamatocactus hamatacanthus v. longihamatus

Hamatocactus hamatocanthus. 

Hamatocactus setispinus. USDA: 9-11. Light shade in hot gardens.  Hardy to 15°F. Water during summer, keep dry winter. Solitary or slowly clustering, up to 4" tall, 3" in diameter. Yellow flowers with darker center. Origin: South Texas, Mexico. QUANTITIES OVER 100 SHIP IN 2-3 WEEKS

Hamatocactus setispinus v. orcutti. 

Hamatocactus setispinus v. setaceus. USDA: 9-11. Light shade in hot gardens.  Hardy to 15°F. Water summer, keep dry winter. Solitary or slowly clustering, up to 4" tall, 3" in diameter. Yellow flowers with darker centers. Origin: South Texas, Mexico.

Hamatocactus species mix. Hamatocactus setispinus v. hamatus, setispinus v. setaceus, sinuatus, uncinatus and others