Japan Flora: Glabrous woody climber; leaves coriaceous, oblanceolate to oblanceolate-oblong, 6-8 (-10) cm. long, 1-2.5 cm. wide, acute with an obtuse tip, acute at base, entire, dark green above, pale green beneath, the petioles 5-10 mm. long; inflorescence depressed-pyramidal, short-peduncu­late, the bracts and bracteoles narrowly deltoid, small; flowers pale yellow; calyx about 3 mm. long, deeply 5-parted; corolla 8-10 mm. across, the tube 4-5 mm. long, about as long as the lobes, the lobes narrowly falcate-oblong, white papillose-hairy inside; follicles deltoid-lanceolate, broadened at base, hori­zontally spreading, 8-10 cm. long, 18 mm. across at base; seeds many, long comose. May-June.

Honshu (warmer parts of Awa and Sagami Prov. and westw.), Shikoku, Kyushu. Ryukyus, Formosa, China, and India.