Japan Flora: Deciduous shrub about 2 m. high, the young branches slender, erect or ascending, white-puberulous and glandular-pilose; leaves membranous, fasciculate and terminal on the branchlets, elliptic to narrowly so, 3-6 cm. long, 1.5-2.5 cm. wide, acute, rounded to obtuse, or sometimes subacute at base, serrulate, green on upper side, often glaucous beneath, the midrib white- puberulent on both sides and loosely glandular-pilose beneath, the petioles 5-10 mm. long, glandular-pilose; flowers about 1.5 cm. across, white, suffused rose-purple, the pedicels white- puberulous and glandular-pilose, 5-10 mm. long; calyx with 5 short lobes, glandular-pilose; corolla short-tubular, 54obed; stamens unequal in length, the 2 upper filaments shorter and densely white-pubescent throughout, the 3 lower stamens with longer glabrous exserted filaments; styles glabrous; capsules globose, glandular-pilose, about 5 mm. across. June-July. Thickets in mountains;

Honshu, Shikoku, Kyushu.