Petasites hybridus, (L.) P. Gaertner

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 187

2. P. hybridus (L.) P. Gaertner , B. Meyer & Scherb., Fl. Weit. 3: 184 (1801)

(P. officinalis Moench ).

Leaves orbicular-cordate, somewhat angular, sparsely tomentose beneath, with 2-5 lateral veins bordering the sinus; basal lobes convergent; margin irregularly toothed, the teeth obtuse; apices of teeth 2-6(-10) mm apart. Scapes with 6-21 scale-leaves in the male, 17-38 in the female, not sheathing at the base, the middle 2-5-5 cm, fewer than half with a rudimentary lamina. Capitula 16-55 in the male, (25—)32—130 in the female. Involucre of male 5-5-8-5 mm, of female 2-5-6 mm; bracts purplish, with entire apex, glabrous except for a few hairs at base. Florets pale lilac-pink or yellowish, all tubular. Stigma of male florets 0-5-1 -3 mm, divided only at the apex. 2л = 60. River-banks and other damp places. Europe, northwards to Scotland, N.C. Germany and C. Russia; naturalized in the Baltic region and Fennoscandia. Al Au Be Br Bu Co Cz Ga Ge Gr Hb He Ho Hs Hu It Ju Po Rm Rs (C, W, K, E) Tu [Da Fe No Rs (B) Su].

In parts of N. Europe the female plant is rare or absent; these are mainly regions in which the species has been introduced.