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Keywords from Image Description:
The Cactaceae Plate XIII . BRITTON AND ROSE PLATE XI HH JWB ISBBal BHI ' SS K' ' Iff nA rfii' ' ' Opuntia exaltata as seen in the highlands of Peru Clump of Opuntia floccosa as it grows in the valleys of the Andes of eastern Peru Plate XIII Illustration biodiversitylibrary org title Britton Nathaniel