Description from Flora of China
Trees ca. 10 m tall; bark light brown to gray-brown, ± smooth; branchlets dark brown, glabrous. Petiole 1-2.5 cm, densely rust-colored pubescent; leaf blade elliptic to ovate or ovate-lanceolate, 7-10 × 4-6 cm, densely rust-colored pubescent, sometimes subglabrous, if glabrous then margin and veins pubescent, base broadly cuneate to rounded, apex obtuse to somewhat acute; lateral veins 6-8 pairs, reticulate veins inconspicuous. Cymes terminating lateral branches, crowded, flat topped, 3-6 cm wide at anthesis, densely rust-colored pubescent. Flowers sessile. Calyx campanulate, 2.5-3.5 mm, shorter than corolla tube, parted to middle or slightly below, densely rust-colored pubescent outside; lobes lanceolate or triangular-lanceolate, rarely oblong. Corolla white, tubular-campanulate, 1-1.1 cm, base ca. 1.5 mm wide; limb 4-5 mm wide; lobes oblong, 2-3.5 mm, recurved, densely rust-colored pubescent outside, margin revolute. Stamens exserted; filaments 6-7 mm, inserted at middle of corolla tube or slightly below; anthers oblong, 1-1.5 mm. Style 0.9-1.1 cm, exserted. Drupes unknown. Fl. Mar.
* Slopes, meadows, margins of cultivated ground; 800-1800 m. SW Yunnan.