Centaurea leucophaea subsp. ochrolopha

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 : 277

(f) Subsp. ochrolopha (Costa) Dostál , loc. cit. (1976)

( C. ochrolopha Costa ):

Lower leaves sometimes undivided. Involucre 9-10 mm in diameter; appendages covering the bracts, yellow, with acuminate apex, the fimbriae 6-8 on each side. Florets pink. Pappus i as long as achene. N.E. Spain.