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6 1009861 Thelocactus tulensis (Poselger) Britton & Rose (Poselger) Britton & Rose [Echinocactus tulensis Poselg.]
K.M. Schumann, M Gürke, F. Vaupel, Bl. Kakt., vol. 1 : t. 18 (1900-1905) [Toni Gürke]
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