Japan Flora: Prominently pubescent, scandent annual or biennial; stems 80-120 cm. long; leaves very short-petioled, 8-12 cm. long, the stipules obliquely or semisagittate, the leaflets 16-24, oblong or elliptic to ovate, 15-20 mm. long, 7-10 mm. wide, soft; racemes 8，12 cm. long inclusive of the peduncle, densely many-flowered, one-sided; flowers about 15 mm. long, purple; calyx-teeth unequal, the lower elongate, linear, slightly longer than the tube; legumes flat，glabrous, narrowly oblong. May-July.

A European species, cultivated for green manure.