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58 720102 Opuntia cyclodes (Engelm. & J.M. Bigelow) Rose [107 720190 Opuntia engelmannii var. cyclodes Engelm. & J.M. Bigelow]
J. Torrey, Pacif. Railr. Rep., vol. 4 fasicle 3, : t. 8 (1853-1856) [P. Roetter]