Echinocactus texensis Hopffer [ Homalocephala texensis (Hopffer) Britton & Rose]
no HD illustration available (m1)
Echinocactus texensis Hopffer [Cactaceae]
N.L. Britton, J.N. Rose, Cact., vol. 3 : t. 19 (1922) [M.E. Eaton]