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6 1139500 Cylindropuntia davisii (Engelm. & J.M.Bigelow) F.M.Knuth [125 720110 Opuntia davisii Engelm. & J.M.Bigelow]
J. Torrey, Pacif. Railr. Rep., vol. 4 fasicle 3, : t. 16 (1853-1856) [P. Roetter]
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