Gentianella amarella subsp. amarella

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 : 65

(a) Subsp. amarella :

Branched from the lowest nodes (very rarely simple). Internodes 4—9(—11). Corolla (14—)16—18 (-22) mm, usually 5-merous, dull purple, blue, pink or whitish; lobes erecto-patent at anthesis. Throughout the range o f the species, except for Iceland and N. Scotland.