Description from Flora of China
Shrubs, 1-3 m tall, monoecious. Branchlets grayish yellow pilose. Leaves trifoliate; petioles 5-8 cm, slightly denser hairy than branchlets; leaflets with petiolules 5-10 mm; blades abaxially dark brown and adaxially black when dry, papery, abaxially densely pilose, adaxially only densely hairy on midvein and lateral veins, sometimes thoroughly scattered adnate pilose, lateral veins slender, 10-12 pairs, prominent on both sides, margin sharply serrulate above middle; terminal blade oblong or broadly lanceolate to elliptic-obovate, 8-15 × 2.5-6 cm, base cuneate or slightly obtuse, apex acuminate; lateral ones smaller. Inflorescences racemose, main rachis unbranched, solitary, longer than petioles, sometimes those on lateral veins longer than leaves. Pedicels ca. 1 mm, slender. Sepals ciliate. Petals oblong-obovate, ca. 1 mm; scales 2-lobed. Filaments slightly hairy at lower part. Fruit red, subglobose, 5-6 mm in diam. Fl. Jul, fr. Oct.
● Forests. S Hainan (Sanya).