Senecio fluviatilis, Wallr.

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 : 195

16. S. fluviatilis Wallr. , Linnaea 14: 646 (1841).

Perennial 60-200 cm. Stock short, with long, fleshy stolons up to 60 cm. Stems erect, branched above or only in inflorescence, glabrous above, puberulent below, densely leafy. Leaves 10-20 x 2-4 cm, elliptical to linear-lanceolate, glabrous, narrowed at the base, acute, serrate or 2-serrate with the outer margin of the teeth convex. Capitula many, 15-30 mm in diameter, in more or less compound corymbs. Involucre 5-8 mm, sparsely tomentose, with 3-5 supplementary bracts up to | as long as the involucre; bracts sometimes black-tipped. Ligules 6-8, 8-12 mm, yellow. Achenes 3-4 mm, glabrous. 2л = 40. Damp meadows and woods. C. & E. Europe, extending to the Netherlands and C. Jugoslavia; naturalized locally in N. W. Europe. Au Cz Ga Ge Ho Hu Ju Po Rm Rs (N, B, C, W, E) [Br Da Hb].