Echinocactus polycephalus Engelm. & J.M.Bigelow
      
no HD illustration available (m3)
2 369469 Echinocactus polycephalus Engelm. & J.M.Bigelow Cactaceae
J. Torrey, Pacif. Railr. Rep., vol. 4 fasicle 3, : t. 3 (1853-1856) [P. Roetter]