Japan Flora: Loosely pubescent to glabrous, rather slender perennial herb 50-100 cm. high; stems angular; stipules narrowly ovate, broadly lanceolate or semisagittate, acuminate, 15-30 mm. long; leaf­lets 2, oblong, subacute, 15-35 mm. long, 5-10 mm. wide, with palmate, nearly parallel nerves, the tendrils branched; racemes long-ped uncled, 5- to 10-flowered, the bracts minute; flowers clear yellow, 15-20 mm. long; calyx-teeth rather equal, elongate-deltoid, as long as or slightly shorter than the tube; legumes broadly linear, 3-4 cm. long, about 6 mm. wide, gla­brous. Sparingly naturalized. 

Honshu (Mount Ibuki in Oomi Prov.).  Europe and nw. Asia.