Opuntia sphaerocarpa 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. 13
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name recognized (= cited name):
720846 Opuntia sphaerocarpa Engelm. & J.M.Bigelow
drawing: P. Roetter
family: Cactaceae
subfamily: Opuntioideae
epithet: sphaerocarpus,-a,-um

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San Francisco Public Library, San Francisco, California, U.S.A.
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2 720846 Opuntia sphaerocarpa Engelm. & J.M.Bigelow
J. Torrey, Pacif. Railr. Rep., vol. 4 fasicle 3, : t. 13 (1853-1856) [P. Roetter]