Nasturtium officinale, R. Br.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1964, Flora Europaea - Volume 1. Lycopodiaceae to Platanaceae, Cambridge University Press : 284

1. N. officinale R.Br. in Aiton, Hort. Kew. ed. 2, 4: 111 (1812)

( Rorippa nasturtium-aquaticum (L.) Hayek ).

10-60 cm, procumbent below, often rooting, then ascending or floating. Leaves pinnate, leaflets more or less entire, round or broadly elliptical; lower leaves with 1-3, upper with 5-9 or more leaflets. Petals nearly twice as long as sepals. Siliqua 13-18 mm, ascending, straight or curved; pedicels c. 10 mm. Seeds in 2 distinct rows in each loculus, with c. 25 polygonal depressions on each face. 2« = 32. Wet places. Europe, northwards to Scotland, S. Sweden and to c. 55° N. in U.S.S.R. All except F a Fe Is Rs (N, B, K) Sb.