Galeopsis tetrahit, L.

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 : 146

8. G. tetrahit L. , Sp. Pl. 579 (1753).

Stems up to 50 cm, the angles setose; opposite sides with appressed hairs. Leaves lanceolate to broadly ovate, acuminate, dentate. Bracteoles setose, with few or no soft hairs. Calyx 12-14 mm. Corolla 15-20(-28) mm, pink (rarely white or pale yellow), with darker markings; middle lobe of lower lip broad, entire, flat. 2« = 32. Most of Europe, but rare in the south-east. All except Az BI Cr Gr Rs (K, E) Sa Sb Si Tu. Plants from the French Alps with terete, glaucous stems have been called subsp. glaucocerata P. Fourn. , Quatre Fl. Fr. 825 (1937); further information about them is required.