Menyanthes trifoliata, 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 : 67

1. M. trifoliata L. , Sp. Pl. 145 (1753) .

Glabrous, with a stout, creeping rhizome; flowering stems 12-35 cm. Leaflets up to 10 cm, obovate to rhombic, sinuate and sometimes remotely denticulate, rounded to subacute, shortly petiolulate; petioles 7-20 cm, sheathing below. Raceme 10- to 20-flowered; pedicels 5-10 mm, longer than the ovate bracts. Calyx-lobes ovate, somewhat recurved. Corolla c. 15 mm in diameter, pink outside, paler or white inside; lobes fimbriate. 2n = 54. In shallow water or the wetter parts of bogs and fens. Most of Europe, but rare in the Mediterranean region.?A1 Au Be Br Bu Co Cz Da Fa Fe Ga Ge Hb He Ho Hs Hu Is It Ju Lu No Po Rm Rs (N, B, C, W, E) Su.