Tufted vetch

Vicia cracca

Perennial; reproducing by seed and by spreading underground root-stocks. Stems 40cm-2m (16-80in.) long, weak, wiry, trailing on the ground or climbing on nearby objects. Leaves alternate (1 per node), pinnately compound with 8 to 12 pairs of bristle-tipped leaflets and branching tendrils at the end; the plant climbing by means of these tendrils.