Description from Flora of China
Trees, to 25 m tall. Branches strong, stout, hollow, furrowed, obtusely ridged, hirsute. Leaves paripinnate; petioles strong, adaxially shallowly furrowed, base enlarged, hirsute; leaflets 5- or 6-jugate, opposite or subopposite; petiolules inflated, ca. 4 mm; blades grayish brown when dry, oblong-ovate or oblong-lanceolate, rarely ovate, 15-25 × 6-9 cm, leathery, glabrous, lateral veins 16-18 per side, arched, netted near margin, base obtuse or subrounded, slightly asymmetrical, margin sparsely and obtusely serrate, sometimes entire below middle. Inflorescences axillary or nearly terminal; rachis strong, furrowed, tomentose; branches slightly sparse, slender; bracts and bracteoles subulate, small. Pedicels 2-3 mm, with hairy joints near base. Sepals triangular, ca. 1.2 mm, abaxially pilosulose. Petals red, ovate or obliquely ovate, ca. 2.5 mm, thin, 3-veined, glabrous or pilosulose; scale obovate-cuneate, nearly as long as 2/3 of petals, margin above middle and abaxial surface brown tomentose. Disk glabrous. Stamens 7 or 8, purplish red; filaments ca. 6.5 mm. Ovary pilose. Capsules shortly fusiform, 4-5.5 × ca. 4 cm, 3-ridged, base and apex acute, sometimes apex beaked; pericarp woody, ca. 5 mm thick, abaxially yellowish brown and rugose, adaxially brown and shiny, stalks strong, ca. 8 mm. Seeds 1-3, brown, usually compressed-glo-
bose, 1-1.5 cm or slightly longer. Fl. early summer, fr. early autumn.
Forests; 100-900 m. Yunnan [N Vietnam].