Campanula patula subsp. patula

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 : 80

(a) Subsp. patula :

Biennial, without stolons. Stem erect or ascending, comparatively slender, more or less pubescent. Calyxteeth a little longer than the ovary, with 1-2 teeth at the base. 2л = 20, 40. Throughout the range of the species.