Centaurea pannonica subsp. pannonica

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 : 290

(a) Subsp. pannonica :

Leaves green or sparsely greyisharachnoid-hairy; cauline lanceolate to linear, entire, rarely pinnately lobed. Capitula solitary, shortly pedunculate. Involucre c. 10 mm in diameter; appendages irregularly denticulate. • C. & S.E. Europe.