Premna acuminatissima Merrill.

Shrubs or trees, 2-5 m tall. Branchlets brown, terete, puberulent when young, glabrescent. Petiole slender, (1-) 2.5-3 mm, pubescent; leaf blade elliptic-ovate to ovate, 5-9 3-4(-5) cm, papery to subleathery, shiny, glabrous or abaxially puberulent, base cuneate to rounded and usually oblique, margin entire or obscurely serrulate near base, apex acuminate to caudate; veins 4 or 5 pairs, elevated on both surfaces. Inflorescences lax panicles, 25 X 10 cm, puberulent. Calyx ca. 1 mm, slightly 2-lipped, glandular; teeth 5, minute, nearly triangular. Corolla ca. 5 mm, outside puberulent and glandular, villous in throat, slightly 2-lipped; lower lip 3-lobed, lobes subrounded; upper lip subrounded, entire, Stamens nearly as long as corolla; anthers subglobose. Ovary glabrous, glandular. Style ca. 5 mm, sparsely glandular. Fruit black, (4.5-)5 mm in diam.

Mixed forests on mountain slopes; 800-1100 m. Hainan, SE Yunnan [Laos, Vietnam].