Slender tree or treelet, (3)9-20 m tall (ca. 50 m fide Bentham), unbranched or with few ascending, sympodial branches on distal portion. Trunk to 20 cm in diam.; bark brown, with numerous black, protruding lenticels; inner bark orangish. Distal portion of stem sulcate, glabrous, lenticellate. Leaves paripinnate, spirally arranged on distal portion of stem(s); petiole 30-45 cm long, sharply trigonous, striate, gradually swollen toward base; rachis (19) 25-45(60) cm long, glabrous, triangular at base, trullate and sharply angled towards apex; petiolules 0.5-1 × 0.2-0.7 cm long, conical, pulvinate; leaflets 8-16 (20), opposite or alternate, coriaceous, glabrous, elliptic, oblong or less often oblanceolate, (6.5)11.5-30 (54) × (2.3) 3-8.5 (14) cm, the adaxial surface with prominent midvein, the abaxial surface with scurfy-like punctations, with prominent midvein and secondary veins, the apex acute to acuminate or less often rounded, the base inequilateral, obtuse-acute or attenuate. Thyrses panicle-shaped, distal or axillary on distal part of branches, 19-50 cm long, lateral branches to 17 cm long; axes puberulent, obtusely angled, sulcate; bracts deltate, ca. 1 mm long; dichasia compound, sessile; pedicels 1-2 mm long, tomentose, articulate on distal portion. Calyx yellowish green, 1.2-2.5 mm long, pubescent to tomentulose, the sepals 0.5-1 mm long, oblong or ovate, concave; petals white, 2.5-4.5 mm long, oblong to oblong-lanceolate, appressed-puberulent or pubescent on the lower half of the abaxial surface, sometimes completely pubescent, glabrous adaxially, ciliate on margins, rounded at apex, clawed at base; appendage as long as the petals, long-triangular, hirsute on the distal half of the adaxial surface, glabrous abaxially, the base cuneate to clawed; disc annular, tomentose; stamens 5, the anthers lanceolate, apiculate, glabrous, 1.2 mm long, the filaments pilose or glabrous, white, of equal length; ovary densely appressed, grayish tomentose, the style elongate, the stigma elongated, trilobed, papillate, pinkish. Fruit 1-to 3-locular, orange-yellow at maturity, trigonous-ellipsoid, 2-2.5 cm long, puberulent, the pericarp coriaceous, ca. 2 mm thick, granulose, the endocarp usually scattered pilose. Seeds ellipsoid, 1 or 2 per fruit.
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