Lactuca perennis, 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

15. L. perennis L. , Sp. Pl. 796 (1753).

Glabrous perennial. Stems (2O-)3O-8O cm, erect, branched above. Leaves pinnatifid or pinnatisect with lanceolate, entire or toothed segments, grey-green; lower shortly petiolate; middle and upper sessile or subsessile. Inflorescence a corymbose panicle with ascending branches. Capitula few, on peduncles 2-8 cm long, with 12-20 florets. Ligules blue to lilac. Achenes 10-14 mm; body narrowly elliptical, slightly tuberculate, 1-ribbed, black; beak almost as long as body. Pappus white, persistent. 2« = 18. Rocks and other dry places’, calcicole. C. Europe, extending to Belgium and locally southwards to S. Spain, S. Italy and S. W. Bulgaria. Al Au Be Bu Cz Ga Ge He Hs Hu It Ju Rm.