Echinocactus arrigens Link ex A.Dietr.
      

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2 368811 Echinocactus arrigens Link ex A.Dietr. Cactaceae
L.K.G. Pfeiffer, F. Otto, Abbild. Beschr. Cact. (Coloured version), vol. 2 : p. 27, t. 27 (1839)