Persicaria bistorta (L.) Samp. [ Polygonum bistorta L.]
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Persicaria bistorta (L.) Samp. [ Polygonum bistorta L.] [Polygonaceae]
A. Fiori, G. Paoletti, Iconogr. Fl. Ital.: p. 120, t. 954, fig. 1 (1895-1904)