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16 503959 Heliocereus speciosus (Cav.) Britton & Rose (Cav.) Britton & Rose [Cereus speciosus K. Schum.]
K.M. Schumann, M Gürke, F. Vaupel, Bl. Kakt., vol. 1 : t. 17 (1900-1905) [Toni Gürke]
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