Centaurea cuneifolia subsp. cuneifolia

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 : 271

(a) Subsp. cuneifolia ( C. oviceps Bornm .): Stems branched at the middle. Leaves white-tomentose, sometimes glabrescent; lower lyrate-pinnatifid. Involucre 12-14x 7-8 mm; appendages brown, not spinose at apex. Stony hillsides. • Bulgaria, N. Greece, Turkey-in-Europe.