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J. Sturm, E.H.L. Krause, K.G. Lutz, Deutschl. Fl., ed. 2, vol. 1 : t. 38 (1906) [65]

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J. Sturm, E.H.L. Krause, K.G. Lutz, Deutschl. Fl., ed. 2, vol. 1 : t. 38 (1906)