Tragopogon pratensis subsp. pratensis

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 : 324

(a) Subsp. pratensis :

Involucral bracts shorter than or equalling ligules, with a pale or white margin. Ligules pale yellow. Beak about as long as body of achene. 2n = 12. Throughout much of the range of the species, but absent from parts of the east.