Carlina corymbosa subsp. corymbosa

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 : 209

(a) Subsp. corymbosa (inch C. thracica Velen. ): Somewhat tomentose. Leaves dentate to pinnatifid, with segments shorter than or about equalling the width of the undivided portion; margin between the principal spines usually finely spinose-dentate. Outer involucral bracts not exceeding the inner, or exceeding them by 10(-15) mm. Throughout the range of the species except for most of the Aegean region.