Trees, to 30 m tall; trunk to 80 cm d.b.h. Branchlets greenish when young and brownish when old, cylindric, glabrous. Petiole 1-1.5 cm, glabrous; leaf blade obovate, obovate-elliptic, or oblong to elliptic, 4-15 × 2-5.7 cm, leathery, glabrous on both surfaces, midrib conspicuously elevated abaxially, concave adaxially, lateral veins 7-9 pairs, curved, elevated on both surfaces, base cuneate, margin slightly revolute, apex shortly acuminate, summit obtuse. Panicles at lower part of short branchlet, (2-)3.5-7(-9) cm, glabrous throughout; peduncle (1-)1.5-3.5 cm; bracts 5-8 mm, outer ones smaller, densely ferruginous pubescent outside, subglabrous inside. Pedicel 4-10 mm. Flowers pale green, yellowish green, or yellowish white, 4-5 mm. Perianth lobes oblong, glabrous outside, pubescent inside. Filaments villous at base, those of 3rd series with stipitate glands. Fruit dark blue, glaucescent when mature, ellipsoid or oblong, to 1.8 × 1 cm, glabrous; persistent perianth lobes not thickened, reflexed. Fl. Apr-May, fr. May-Oct.
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