Tree c. 20 m by 40 cm, sometimes buttressed, sometimes with stiltroots. Branchlets c. 0.5 cm thick, glabrescent; pith with some large peripheral vascular strands, sometimes also some central ones. Stipules persistent, inserted on the petiole at ¼-1 cm from its base, auricle-shaped, 1½-4 mm long, thinly tomentose. Leaves 0-3-jugate, glabrous. Leaflets oblong-lanceolate to elliptic-oblong, 8-21 by 3-10 cm, chartaceous, reddish-brown to cinnamomeous when dry; base cuneate; margin entire; apex subabruptly, long, and slender, blunt-acuminate; nerves 8-15 pairs (angle 60-70°), faintly curved, distinctly arching near the margin. Inflorescences (female unknown) terminal and sometimes in the upper leaf-axils, paniculate, 4-32 cm long, glabrous. Flowers (male) c. 3 mm long, glabrous outside. Calyx 2-3 mm high. Stamens 6-3, free, glabrous. Disk cushion-shaped, solid, c. 1 mm high, glabrous. Infructescences terminal, narrowly paniculate, 6-7 cm long, with few fruits; calyx flat, triangular to nearly orbicular, 9-12 mm diam. Fruits ovoid, 3-5.5 by 1½-2¾ cm, round to bluntly triangular in cross-section, glabrous; pyrene smooth with a blunt rib in the apical part of each angle; lids 2.5-3.5 mm thick. Seeds 3-1; sterile cells mostly slightly reduced.
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A tree about 20 m tall. It is 40 cm across the trunk. Sometimes it has buttresses. The small branches are about 1.5-2 cm thick. The leafy structures (stipules) on the leaf stalk are 0.3-1 cm from the base. They are ear shaped. The leaves have up to 3 pairs of leaflets. The leaflets are oblong and 8-21 cm long by 4-10 cm wide. They are papery. The base of the leaflet is wedge shaped. The tip is long and slender. There are 8-15 pairs of veins which are slightly curved and more so near the leaf edge. The flower clusters are in the upper axils of the leaves. They are 4-32 cm long. The fruit stalk is 6-7 cm long with few fruit. The fruit are oval and 3-6 cm long by 1.5-2.7 cm wide. They are rounded or triangular in shape. The stone is smooth with a rib on each edge. There are 1-3 seeds inside.
In primary mixed and sagu forests at low altitudes, up to 850 m, also in secondary forests, fl. Mainly Aug., fr. April-Sept.
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Primary mixed and sagu forests, usually at low altitudes, occasionally up to 850 metres.
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