Euphorbia amygdaloides subsp. amygdaloides

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1981, Flora Europaea. Volume 2. Rosaceae to Umbelliferae, Cambridge University Press : 226

(a) Subsp. amygdaloides :

Stems flowering in the second year. Leaves of the first year’s growth larger than those o f the second and crowded at the top of the stem. Hom s o f the glands usually convergent. Throughout the range o f the species, except Corse and Sardegna.