Japan Flora: Much-elongate woody climber with yellowish pubescent young branches; leaves ob­long or ovate, 6-12 cm. long, 3-6 cm. wide, usually rounded at base, the petioles 1.5-2.5(-3) cm. long; peduncles axillary, shorter than the petioles, the pedicels 2-5, about 1.5 cm. long, nearly as long as the flowers; flowers white, fragrant; flowers white, fra­grant; calyx-segments 1/2-3/4 as long as the corolla-tube, rounded to subacute; corolla-tube 12-44 mm. long, hairy inside, the lobes broadly lanceolate, slightly reflexed, subobtuse, about 20 mm. long. June-July.

Honshu (Awa Prov. and westw.), Shi­koku, Kyushu (s. distr.).  Ryukyus.