Opuntia macrorhiza Engelm. [ Opuntia tortispina 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. 8
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Opuntia macrorhiza Engelm.

name cited:
Opuntia tortispina Engelm. & J.M. Bigelow
name recognized:
Opuntia macrorhiza Engelm.
drawing: P. Roetter
family: Cactaceae
subfamily: Opuntioideae
epithet cited: tortispinus,-a,-um

epithet recognized: macrorhizus,-a,-um

Illustration contributed by:
San Francisco Public Library, San Francisco, California, U.S.A.
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12 720490 Opuntia macrorhiza Engelm.
J. Torrey, Pacif. Railr. Rep., vol. 4 fasicle 3, : t. 8 (1853-1856) [P. Roetter]