Echinocactus texensis Hopffer Echinocactus texensis Hopffer in Allg. Gartenzeitung 10: 297. 1842 sec. Hunt 2016=Homalocephala texensis (Hopffer) Britton & Rose, Cactaceae (Britton & Rose) 3: 181. 1922 syn. sec. Guzmán & al. 2003