Centaurea pectinata subsp. pectinata

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 : 296

(a) Subsp. pectinata :

Stems 20-40 cm. Leaves pale or greyishgreen, tomentose; upper cordate at the base, semiamplexicaul. Involucre 15 mm in diameter, ovoid. Throughout the range of the species.