Campanula sibirica subsp. sibirica

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 : 84

(a) Subsp. sibirica ;

Stems simple, solitary, branched at the apex. Appendages lanceolate, reticulate and ciliate, usually shorter than the ovary. Corolla 17-25 mm. Throughout the range of the species.