百色豆腐柴 bai se dou fu chai

Trees ca. 13 m tall; bark gray. Branchlets green pubes-cent when young, becoming brown, glabrous, and striate. Leaf blade narrowly elliptic to elliptic, 9-15 X 3-6.5 cm, sub-membranous, abaxially yellowish green, adaxially minutely hispid, densely brown tomentose, and yellowish glandular, base obtuse to broadly cuneate, margin entire or slightly irregularly undulate, apex acute to subacuminate; veins 5 or 6 pairs, abaxially elevated. Inflorescences lax, spreading, dichotomous, 12-15 X 10-20 cm; peduncle 4-6 cm, densely yellow-brown pubescent; bracts linear, 2-9 mm. Fruiting calyx subtruncate, outside sparsely pubescent and glandular. Fruit purple, globose to ovate, 5-6 X 4-5 mm, pubescent, glandular. Fr. Jul-Aug.

* Mixed forests on mountain slopes; ca. 1000 m. Guangxi (Bose Xian)

Allied to Premna szemaoensis but differs in having narrower submembranous leaf blades.