Centaurea (Psephellus), (Cass.) Schmalh. Perennial

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 : 297

Subgen. Psephellus (Cass.) Schmalh. Perennial ;

stems erect. Lower leaves pinnatisect; middle leaves entire or dentate, not pinnatisect. Appendages not decurrent, pectinate-fimbriate, not spinose. Corolla 5-fid. Pappus present, caducous.