Sclerocactus polyancistrus (Engelm. & J.M. Bigelow) Britton & Rose [ Echinocactus polyancistrus Engelm. & J.M.Bigelow]
      
no HD illustration available (m3)
6 924240 Sclerocactus polyancistrus (Engelm. & J.M. Bigelow) Britton & Rose [80 369468 Echinocactus polyancistrus Engelm. & J.M.Bigelow] Cactaceae
J. Torrey, Pacif. Railr. Rep., vol. 4 fasicle 3, : t. 2 (1853-1856) [P. Roetter]