Centaurea seridis, 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 : 283

151. C. seridis L. , Sp. Pl. 915 (1753).

Perennial. Stems 30-80 cm, erect, simple or branched, winged. Leaves hispidulous; lower petiolate. Capitula solitary, surrounded by upper leaves. Involucre 15-25 mm in diameter, ovoid to subglobose; appendages slightly deflexed, the spines 3-5 mm, (5—)7— 11, the apical somewhat longer, 1| times as long as bract. Florets purple, the outer patent. Achenes 4-5 mm; pappus absent in outer and short in inner achenes. • S. & S.E. Spain.?B1 Hs. 1 Lower leaves lyrate-pinnatifid (c) subsp. maritima

1 Lower leaves sinuately lobed to entire

2 Appendages with stout spines at apex, the central one longer than the others (a) subsp. seridis

2 Appendages with slender spines at apex, the central one not longer than the others (b) subsp. cruenta