Description from Flora of China
Shrubs, 2-3 m tall. Branchlets grayish brown when dry, terete. Petiole 4-6 mm; leaf blade leathery, narrowly lanceolate, 9-12 × 1.5-2.5 cm, both surfaces with obvious glands, abaxially brownish green when dry, adaxially green and slightly glossy when dry, secondary veins 8-12 on each side of midvein, 7-10 mm apart, abaxially slightly raised, and adaxially inconspicuous, reticulate veins conspicuous, intramarginal veins ca. 1.5 mm from margin, base narrowly cuneate, apex acuminate to slightly acute. Inflorescences terminal or sometimes axillary, cymes; peduncle ca. 1 cm. Flowers white, ca. 3 cm in diam. Hypanthium broadly obconic, ca. 8 × 10 mm. Calyx lobes 4, semiorbicular, ca. 3 × 7-8 mm. Petals distinct, orbicular, ca. 8 mm in diam. Stamens ca. 2 cm. Style slightly exceeding stamens. Fruit globose, ca. 2 cm in diam. Fl. Apr-Jul, fr. Apr-Jun or Jul-Sep.
● Open or dense forests or scrub, riversides, sandy beaches; 200-1000 m. W Guangxi, S Yunnan.