Echinocereus engelmannii (Parry ex Engelm.) Lemaire [ Cereus engelmannii var. chrysocentrus Engelm. & J.M.Bigelow]
Torrey, J., Reports of explorations and surveys, to ascertain the most practicable and economical route for a railroad from the Mississippi River to the Pacific Ocean in 1853-6 (1856)
Pacif. Railr. Rep.

vol. 4 (1853-1856)
t. 5
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