Upright growing small tree or shrub. Shoots stout, glabrous with dark sticky buds. Flower bud globular. Petiole tapering distally, green or crimson, to 22 mm. Leaf blade oblanceolate, to 27 x 7.5 cm. Apex acuminate, with mucro. Leaf base rounded. Leaf upper side dark green, glabrous, with yellowish midrib. Leaf lower side with thin, unistrate, brownish indumentum of 4-winged, radiate hairs. Inflorescence with up to 20 flowers. Rachis to c. 25 mm. Pedicels reddish, glabrous or slightly hairy, to 33 mm.Calyx small, glabrous, with 5 triangular lobes, 1-2 mm. Corolla broadly campanulate, with 5 lobes, white with pink tinge and lines, spotted, with or without red blotch. Ovary hairy. Stamens 10, unequal in length, proximally puberulent. Style glabrous, with upward bend green stigma. Capsule curved, cylindrical, with scattered ?radiate hairs, to 35 mm. Seeds winged and with floating sacs, 1.9 – 2.5 mm. Locality of origin: Xiangcheng County, Sichuan, 3900 m. Occurrence: SW Sichuan, NW Yunnan, SE Xizang, NE Myanmar at (2700-) 3200 – 4500m according to Flora of China.