Lactuca virosa, 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 : 330

13. L. virosa L. , Sp. Pl. 795 (1753).

Annual or biennial, with foetid roots. Stem up to 200 cm, erect, glabrous or setose below. Leaves obovate-oblong, dentate to pinnatifid with wide lobes, spinulose on the midrib beneath. Bracts with appressed auricles. Inflorescence a long, pyramidal panicle; capitula with c. 15 florets. Ligules pale yellow. Achenes 6-10 mm; body elliptical, narrowly winged, rugose, 5-ribbed, blackish; beak as long as body. 2л = 18. Dry, stony or sandy places. S., W. & C. Europe', cultivated as a medicinal plant and in some districts only naturalized. Au Be?B1 *Br Co Ga Ge Gr He Hs Hu It Ju Lu Rm Sa Si Tu [Po].