Gentiana verna subsp. verna

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 62

(a) Subsp. verna :

Leaves usually lanceolate or elliptical, usually acute. Wings of calyx 1-2 mm wide. Corolla-lobes obtuse. 2« = 28. Throughout most o f the range o f the species.