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1 788517 Phyteuma michelii All.
H.G.L. Reichenbach, Icon. Fl. Germ. Helv., vol. 19(1): (Die Cichoriaceen, Ambrosiaceen, Campanulaceen, Lobeliaceen dazu die Cucurbitaceen der deutschen Flora ): t. 1585, fig. 1.2 (1860) [H. Hummitzsch & H.G. Reichenbach]
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