Medium-sized to large tree, up to c. 42 m. Leaves (3-)5-9-jugate; leaflets elliptic to oblong to ovate-oblong, medium-sized to rather large, up to c. 20 by 9 cm, base rounded or obtuse to truncate, entire, rarely with a few teeth (Sulawesi), chartaceous to firmly coriaceous, very sparsely to densely pubescent, always without domatia. Panicles erect and spreading, lax and slender to rather dense; lower primary side-axes usually subtended by small leaves. Sepals and petals glabrous. Ovary glabrous, rarely with a few scattered hairs. Endocarps subglobose, sometimes more obovoid or depressed, more or less oblique, 3.5-5 mm diam., exceptionally 5-7.5 mm diam. (Sulawesi), with vague to distinct and prominent reticulum, with rather sharp and prominent median keel which at one end mostly runs out into a small but distinct ventral processus or tubercle; ventral pore somewhat sunken.
Usually in primary, rarely in secondary rain-forest, at low tomedium altitudes; in Borneo only collected below 100 m, in the other parts of the area also higher, up to c. 1100-1200 m, in W. New Guinea once at 1800 m. In Borneo usually found in lowland dipterocarp forests. Generally reported to occur on clayish, loamy, or sandy clayish soils, also on red earth, on volcanic soil, and on loamsoil on limestone. It is rarely found in occasionally submerged areas. Once (New Guinea) said to occur on peaty soil, and there developing stiltroots.
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