Centaurea decipiens subsp. decipiens

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 : 291

(a) Subsp. decipiens :

Stems 30-40 cm, simple or branched above. Leaves greyish-tomentose. Involucral bracts 5-veined. Mainly in the north part of the range of the species, except the Netherlands.