Description from Flora of China
Trees (4-)7-12 m tall. Branchlets, petioles, and inflorescences brown tomentose. Branchlets lenticellate, nodes usually with a rounded or half rounded leaf scar, with gland-tipped hairs when young, glabrescent. Petiole terete, 0.5-6 cm; leaf blade broadly ovate to ovate-lanceolate, 8-18 X 6-14 cm, papery, abaxially densely brown tomentose, adaxially sparsely pubescent, base broadly cuneate to subrounded, margin entire or irregularly serrate, apex acuminate to acute; veins 6-8 pairs, abaxially elevated. Inflorescences 5-12 X 7-23 cm; peduncle 1.5-3 cm; bracts linear, 4-15 mm. Calyx campanulate, ca. 1.5 mm, subtruncate to slightly 2-lipped; lips usually slightly 2-dentate, pubescent, yellow glandular. Corolla greenish to yellowish, 3.5-4 mm, outside puberulent, inside glabrous except villous at throat. Stamens and style exserted; filaments puberulent at base. Ovary glabrous, apically yellow glandular. Fruit black, obovate to rounded, 5-7 X 4-5 mm. Fl. and fr. Jun-Sep.
Allied to Premna fohainensis but differs in having subtruncate to slightly 2-lipped calyces, lips usually slightly 2-dentate, and branchlet nodes with a rounded or half rounded leaf scar.
* Open forests; 500-1500 m. S Yunnan