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6 432156 Ferocactus viridescens (Nutt. ex Torrey & A. Gray) Britton & Rose [80 369724 Echinocactus viridescens Nutt.]
K.M. Schumann, M Gürke, F. Vaupel, Bl. Kakt., vol. 3 : t. 177 (1910) [J. Pohl]
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