Dipterocarpus confertus (PROSEA)

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Plant Resources of South-East Asia
List of species

Dipterocarpus confertus v. Slooten

Protologue: Bull. Jard. Bot. Buitenzorg, sér. 3, 8: 322, f. 9 (1927).

Vernacular names

  • Brunei: keruing kobis
  • Indonesia: kerubang tudang, keruing pungguh, keruing tempurung (Kalimantan)
  • Malaysia: keruing kobis (Sabah, Sarawak), keruing kolong, keruing kelukop (Sabah).




The timber is used as keruing. Wood-oil can be obtained from the bole which is locally known as "tudan" and is used for torches.


  • A medium-sized or rarely large tree of up to 50 m tall, bole cylindrical, up to 145 cm in diameter, buttresses up to 3 m tall, c. 15 cm thick, rounded, spreading, bark surface slightly ribbed, rust-red, or paler to grey, inner bark dark red-brown, sapwood pale yellow, heartwood light ashy red to reddish or dark brown; buds broadly ovoid, pale fulvous-brown tufted hispid.
  • Leaves broadly obovate to orbicular, (18-)22-35 cm × (14-)16-22 cm, base obtuse or subpeltate, apex obtuse or shortly acuminate, secondary veins 9-12 pairs, upper surface caducous hispid, venation beneath persistently tufted hispid, petiole 5-6 cm long, stipules broadly ovate, persistently hispid outside.
  • Stamens about 25.
  • Fruit calyx tube narrowly obovoid, with 5 indistinct ridges, densely tomentose, 2 larger fruit calyx lobes up to 14 cm × 3 cm, 3 shorter ones up to 1.7 cm × 0.7 cm.

D. confertus is rather common but occurs scattered in mixed dipterocarp forest on low hills and undulating land below 800 m altitude. The density of the wood is 690-900 kg/m3at 15% moisture content.

Selected sources

30, 31, 89, 251, 461, 476, 737, 746, 748.

Main genus page


  • T. Smitinand (selection of species),
  • C. Phengklai (selection of species),
  • L.E. Groen (selection of species)