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Deutschlands flora, deel 19, J. Sturm, J.W. Sturm (1841-1843)
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Fig. 13-17
Genera plantarum florae germanicae, Monocotyledones 2 Cyperaceae, deel 3, T.F.L. Nees von Esenbeck (1843)
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Flora Danica, Georg Christian Oeder e.a. (1761-1883)
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Illustrations of the British Flora, Walter Hood Fitch (1924)
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