Lactuca longidentata, Moris ex DC.

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 : 329

3. L. longidentata Moris ex DC. , Prodr. 7: 139 (1838).

Glaucous biennial. Stem up to 100 cm, erect, striate. Lower leaves obovate to lanceolate, laciniate-runcinate to pinnatipartite, narrowed into a petiole, with the undivided part of the lamina 2-8 cm wide; upper ovate in outline, deeply laciniate, dentate, acuminate, with decurrent-amplexicaul base. Inflorescence a pyramidal panicle with ascending branches. Capitula with 5-6(-8) florets. Ligules yellow. Achenes 7-9 mm; body oblong, 7- to 11 -ribbed, black; beak i as long as body. Calcareous rocks. • Sardegna. Sa.