Lathyrus japonicus, Willd.

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 : 138

4. L. japonicus Willd. , Sp. Pl. 3: 1092 (1802).

Somewhat glaucous, glabrous or pubescent perennial; stem up to 90 cm, not winged. Leaves sometimes without tendril; leaflets 2-5 pairs, (10—)20-40x (5-)10-20 mm, elliptical, pinnately veined; stipules 10-25 x 10-20 mm, triangular-hastate. Racemes 2- to 12- flowered. Calyx-teeth more or less unequal; corolla 14-22(-25) mm, purple becoming blue. Legume 30-50 x 6-10 mm, brown, glabrescent. Seeds 4-11, smooth; hilum | of the circumference. Maritime sands and shingle; rarely on shores o f large lakes. Coasts o f W. & N. Europe; inland in N. W. Russia and N. Norway. Br Da Fe fG a Ge Hb?Hs Is No Po Rs (N, B, C) Su.