Sonchus tenerrimus, 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

2. S. tenerrimus L. , Sp. Pl. 794 (1753).

Annual, biennial or perennial; stem 10-80 cm, branched (except in some annual variants). Leaves with subobtuse to acuminate auricles, the lower glabrous, with few lobes, the upper larger, often white-tomentose when young, pinnatisect with many ovate to linear-lanceolate lobes strongly constricted at the base and entire or denticulate, or rarely with linear lobes. Base of capitula and upper part of peduncles white-tomentose, often glandular-hairy. Involucral bracts 25-30. Ligules longer than corolla-tube. Achenes 2-5-3 - 3 x 0-5-1 -2 mm, narrowly oblanceolate, tuberculate or rugose between the ribs; pappus 6-8 mm, more or less persistent. 2л = 14. 5. Europe. Az BI Co?Cr Ga Gr Hs It Ju Lu?Rm Sa Si?Tu.