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6 1139500 Cylindropuntia davisii (Engelm. & J.M.Bigelow) F.M.Knuth (Engelm. & J.M.Bigelow) F.M.Knuth [Opuntia davisii Engelm. & J.M.Bigelow]
W. Curtis, Bot. Mag., vol. 108 [ser. 3, vol. 38] (t. 6600-6664): t. 6652 (1801) [A. Barnard]
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