Description from Flora of China
Shrubs to 3 m tall. Young branches grayish white, slender;
current year branchlets pubescent or glabrescent. Petiole 3-5 mm, sparsely pubescent or glabrescent; leaf blade oblong to oblong-lanceolate, 4-7(-14) × (1-)1.5-3(-3.5) cm, thinly leathery, abaxially pale green and sparsely pubescent along midvein or glabrescent, adaxially dark green, shiny, and glabrous, midvein abaxially elevated and adaxially impressed, secondary veins obscure on both surfaces, base cuneate, margin widely undulate-dentate, apex obtuse. Flowers axillary or subterminal, solitary, 8-10 mm in diam. Pedicel ca. 1.5 mm; bracteoles 2, persistent, semiorbicular, 1-1.5 mm, glabrous, margin ciliolate. Sepals 5(or 6), persistent, suborbicular, 2.5-4 mm, leathery, glabrous, margin membranous and ciliate. Petals 5 or 6, white, obovate to obovate-elliptic, 7-8 × 3.5-5.5 mm, basally connate for 2-3 mm, apex rounded. Stamens ca. 4 mm, glabrous; filament subulate, basally connate for ca. 1.5 mm. Ovary glabrous, 3-loculed; styles 3, distinct, ca. 3 mm. Capsule oblate, 1-1.5 cm in diam.; pericarp 1-1.5 mm thick. Seeds brown, hemispherical. Fl. Apr-May, fr. Nov.
● Rain forests; 300-500 m. S and SW Hainan.