Echinocactus polyacanthus Link & Otto [ Melocactus poliacanthus Link & Otto]
      

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6 369467 Echinocactus polyacanthus Link & Otto Cactaceae
H.F. Link, C.F. Otto, Die Gattungen Melocactus und Echinocactus: p. 422, t. 16, fig. 1 (1827) [C.W. Röthig]