Sonchus palustris, L.

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 : 327

5. S. palustris L. , Sp. Pl. 793 (1753).

Perennial; stem 100- 250(-400) cm, simple, angled, the upper part, including the inflorescence, with dense glandular hairs. Basal leaves oblong-lanceolate, entire to pinnatifid; cauline with lanceolate, acute, denticulate auricles, the upper cauline smaller and linear-lanceolate. Capitula terminal, pedunculate, densely glandular-hairy. Involucral bracts c. 42. Ligules as long as corolla-tube. Achenes c. 3-75 x 1 -2 mm, oblong-elliptical, rugose between the ribs, with wide margin; pappus c. 7-5 mm, deciduous. 2л= 18. Marshes and other wet places. From England, S. Fennoscandia and N.C. Russia southwards to S. France, N. Italy and Bulgaria. Au Be Br Bu Cz Da Ga Ge fHe Ho Hu It Ju No Po Rm Rs (?N, B, C, W, К, E) Sa Su.