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T.F.L. Nees von Esenbeck, W. Sinning, Samml. Schönbl. Gew., vol. 2 (Atlas): p. 0, t. 0 (1831) [1]
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U.S. Department of Agriculture, National Agricultural Library
T.F.L. Nees von Esenbeck, W. Sinning, Samml. Schönbl. Gew., vol. 2 (Atlas): p. 0, t. 0 (1831)