Hieracium caespitosum subsp. caespitosum

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 : 373

(a) Subsp. caespitosum :

Stolons above ground, with large leaves. Leaves green. Involucre dark; bracts with narrow pale margins and simple eglandular hairs mostly 1-3 mm. 2« = 45. Mainly in C. & E. Europe.