5 371877 Echinopsis oxygona (Link) Zucc. ex Pfeiff. & Otto [125 369029 Echinocactus eyriesii Turpin] Cactaceae
L.K.G. Pfeiffer, F. Otto, Abbild. Beschr. Cact. (Coloured version), vol. 1 : p. 4, t. 4 (1839)