Centaurea collina, 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 : 263

11. C. collina L. , Sp. Pl. 918 (1753).

Stems 20-60 cm, simple or sparingly branched above. Leaves scabrid, sometimes fioccose, lower pinnatipartite or 2-pinnatisect, rarely undivided; rhachis and petiole not winged; segments at least 3 mm wide, oblong or linear, mucronate; upper leaves undivided. Involucre 13-17 mm in diameter; bracts oblong-ovate; appendages covering the bracts, with an apical spine with a somewhat spinulose base. Florets yellow or purple, the outer longer than the inner. Achenes c. 4 mm, blackish; pappus c. 4 mm. 2л = 20. Open hillsides. • S. W. Europe.?B1 Co Ga Hs It Lu.