Myosotis arvensis subsp. arvensis

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 : 112

(a) Subsp. arvensis :

Calyx not more than 5 mm in fruit; hooked hairs not more than 0-4 mm. Nutlets not more than 2 mm. 2 m = 52. Throughout the range o f the species.