Centaurea (Cyanus), (Miller) Hayek

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. Cyanus (Miller) Hayek . Annual or perennial, rarely biennial. Leaves undivided to pinnatisect. Appendages distinctly decurrent, denticulate to fimbriate, muticous. Pappus present, rarely absent.