Gratiola officinalis, 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 : 203

1. G. officinalis L. , Sp. Pl. 17 (1753) .

Glabrous. Stems 1O-5O(-8O) cm, hollow, 4-angled above, erect from a creeping and rooting base. Leaves 20-50 mm, linear to lanceolate, serrate to subentire, semiamplexicaul, glandular-punctate. Pedicels shorter than subtending leaves. Corolla 10-18 mm, white, usually veined and tinged with purplish-red. Upper staminode minute, the 2 lower long and slender. Ditches, river-banks and wet meadows. 2« =32. Europe, northwards to the Netherlands, Estonia and S. Ural. Al Au Be Bu Cz Ga Ge G r He Ho Hs Hu It Ju Lu Po Rm Rs (B, C, W, K, E) Sa Tu.