Echinopsis oxygona (Link) Zucc. ex Pfeiff. & Otto [ Echinocactus oxygonus Link]
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Echinopsis oxygona (Link) Zucc. ex Pfeiff. & Otto [ Echinocactus oxygonus Link] [Cactaceae]
W. Rhind, Hist. Veg. Kingd.: t. 12, fig. 11 (1868) [W.H. Fitch]