Cornutia corymbosa N. L. Burman; Premna corymbosa Rottler & Willdenow; P. corymbosa (N. L. Burman) Merrill (1917), not Rottler & Willdenow (1803); P. integrifolia Linnaeus; P. integrifolia var. obtusifolia (R. Brown) P'ei; P. obtusifolia R. Brown.

Shrubs or trees, 1-8 m tall, erect or rarely climbing. Branchlets with elliptic yellowish lenticels, densely pubescent when young, subglabrescent. Petiole 0.3-5 cm, puberulent; leaf blade oblong to broadly ovate, 3-15 X 2.5-9.5 cm, papery, subglabrous or pubescent only along veins, base broadly cuneate, rounded, or truncate, margin entire, slightly undulate, or crenate, apex acute to rarely acuminate or obtuse. Inflorescences 1.5-15 X 2.5-24 cm; peduncle 0.8-3 cm; bracts linear to lanceolate, to 6 mm, puberulent. Calyx cup-shaped, 1.5-3 mm, 2-lipped, lower lip subentire to shortly 3-dentate, upper lip longer than lower lip and 2-dentate, outside puberulent and yellow glandular. Corolla yellowish green, outside glandular, villous in throat, slightly 2-lipped; lower lip 3-lobed, lobes subequal or middle lobe slightly longer and broader; upper lip entire or emarginate. Ovary glabrous, apically glandular. Style 3.5-4 mm. Fruit globose, 2-4 mm in diam. Fl. and fr. Apr-Oct.

Mixed and open forests on mountain slopes and along streams; 100-300 m. Guangdong, Guangxi, Taiwan [S and SE Asia, Australia, Pacific Islands].