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Keywords from Image Description:
The Cactaceae Plate XIV . BRITTON AND ROSE VOL Ill PLATE XIV Eaton del Flowering plant of Ferocactus viridescens Top of flowering plant of Ferocactus rectispinus All natural size Plate XIV Illustration biodiversitylibrary org title Britton Nathaniel Lord Rose NameFound Ferocactus rectispinus NameConfirmed Ferocactus