Dipterocarpus confertus Sloot., Bull. Jard. Bot. Btzg. III, 8 (1927)
Latin for 'clustered or crowded'.

Description
Emergent trees up to 51 m tall and 151 cm dbh. Stems with resin. Stipules ca. 50 mm long. Leaves alternate, simple, penni-veined, peltate, surface folded between secondary veins, densely hairy on lower surface. Flowers ca. 56 mm in diameter, white-pinkish, placed in subcymose inflorescences. Fruits ca. 25 mm long, red-green, with two ca. 130 mm long wings placed on top of the nut, wind dispersed.

Ecology
In undisturbed mixed dipterocarp forests up to 600 m altitude. Mostly on hillsides and ridges with clayey to sandy soils. In secondary forest usually present as a pre-disturbance remnant tree.

Uses
Timber is commercially harvested.

Distribution
Sumatra, Borneo (Sarawak, Brunei, Sabah, East-Kalimantan).

Local names in Borneo
Keruing, Keruing buluh, Keruing kobis, Keruing kolong, Keruing eloi, Keruing mengkai, Keruing kerupuk, Tempudau.