Japan Flora: Twining perennial, the stems rather slender, spreading to reflexed brown-pilose; stipules broadly lanceolate, few-nerved, 3-4 mm. long, acuminate, attached slightly above the base; leaflets coarsely pilose on both sides, the terminal 6-10 cm. long, 3-4 cm. wide, the stipels small, linear; ra­cemes very short, umbellike, 2- to 4-flowered, on a long pedun­cle 10-20 cm. long, the bracteoles lanceolate, caducous, the pedicels very short; calyx short-hispid, 8-10 mm. long, the teeth rather equal; keel gradually curved; legumes densely brown-hispidulous.  Sept-Oct.

Kyushu; rare. A variable widespread plant of tropical regions.