Description from Flora of China
Large trees, up to 22 m tall, ca. 60 cm d.b.h. Bark blackish brown. Branchlets always narrowly angled or shallowly sulcate, glabrous, blackish brown and irregularly gray-brown rugose when old. Terminal buds ovoid, ferruginous tomentose. Leaves opposite or subopposite, clustered at apex of branchlet; petiole 6-10 mm; leaf blade abaxially always purplish, adaxially shiny, green-brown or gray-brown when dry, lanceolate or narrowly elliptic, 8-15 × 1.5-5 cm, leathery, glabrous on both surfaces, midrib abaxially elevated, adaxially somewhat impressed or at least impressed on lower 1/2, lateral veins 8-10 pairs, elevated on both surfaces, veins densely reticulate, slightly elevated on both surfaces, base cuneate or broadly cuneate, margin slightly revolute, apex obtuse or shortly acuminate with an obtuse acumen. Panicles axillary, 2-6 cm, few flowered. Pedicels thickened and swollen at both ends after anthesis. Infructescences robust, swollen at base. Fruits ellipsoid, subglobose, or obovoid, 4-5 × 3-4 cm, pallid ferruginous or black in color, brown furfuraceous, densely plicate and ferruginous punctate when dry; fruiting pedicels enlarged on one end or on both ends, enlarged part 7-15 mm in diam. Fr. Aug-Oct.
● Humid places in mixed forests on mountain slopes. Hainan.