Podospermum purpureum (L.) W.D.J.Koch & Ziz [ Scorzonera purpurea L.]
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Podospermum purpureum (L.) W.D.J.Koch & Ziz [ Scorzonera purpurea L.] [Compositae]
C. Clusius, Rar. Pl. Hist., vol. 2 fasicle 5, : p. 139, fig. 1 (1601)