Petasites hybridus (L.) G.Gaertn., B.Mey. & Scherb. [ Petasites officinalis Moench]
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Petasites hybridus (L.) G.Gaertn., B.Mey. & Scherb. [ Tussilago hybrida L.] [Compositae]
A. Fiori, G. Paoletti, Iconogr. Fl. Ital.: p. 423, t. 3400, fig. 9 (1895-1904)