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Keywords from Image Description:
The Cactaceae Plate XII . BRITTON AND ROSE VOL Ill PLATE XII Eaton del Top of flowering plant of Ferocactus townsendianus Top of flowering plant of Ferocactus wislizeni Flower of Ferocactus diguetii All natural size Plate XII Illustration biodiversitylibrary org title Britton Nathaniel Lord Rose NameFound Ferocactus