Centaurea margaritacea subsp. dubjanskyi

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 : 286

(k) Subsp. dubjanskyi (Iljin) Dostál, loc. cit. (1976)

( C. dubjanskyi Iljin ):

Stems smooth above. Involucre 15-25 x 15-25 mm, subglobose; appendages 6-7 x 8-9 mm, covering bracts, orbicular, concolorous, pale yellow, shining, pellucid, indistinctly keeled, the margin subdenticulate, flat, the apex muticous. Florets yellow. Achenes 4-5-5 mm, blackish; pappus 3-5-5 mm. Sandy hills. • S.C. Russia (near Borisoglebsk, Voronežskaja Obi.).