Centaurea boissieri subsp. boissieri

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 : 280

(d) Subsp. boissieri :

Stems 10-30 cm, ascending. Leaves greytomentose on both surfaces; lower undivided or pinnatifid. Involucre c. 11x8 mm, ovoid-globose; appendages triangularlanceolate, with recurved apical spine 3-5 mm, the lateral fimbriae confluent with the hyaline margin. Florets pink. Rocky places on mountains. • S. & E. Spain.