Dipterocarpus rigidus (PROSEA)

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Plant Resources of South-East Asia
List of species

Dipterocarpus rigidus Ridley

Protologue: Journ. Str. Br. Royal As. Soc. 82: 171 (1920).

Vernacular names

  • Indonesia: bayan tuwung (South Kalimantan), keruing likat (Sumatra), tuyong (East Kalimantan)
  • Malaysia: keruing chogan (Peninsular, Sarawak), keruing utap (Sarawak), keruing kelewar (Peninsular).


Peninsular Malaysia, Sumatra and Borneo.


The timber is used as keruing.


  • A large tree of up to 50 m tall, bole up to 95 cm in diameter, buttresses up to 1 m tall, stout, concave, bark surface rust-brown, shallowly patchily flaked; buds conical, tomentose but glabrous on mature trees.
  • Leaves ovate, 13-25 cm × 8-16 cm, base broadly cuneate, acumen up to 1 cm long, secondary veins 12-16 pairs, beneath shortly densely pubescent, petiole 3-6 cm long, stipules lorate, subacute, outside tomentose but glabrescent.
  • Stamens 24.
  • Fruit calyx tube subglobose, 5-tuberculate, glabrous, 2 larger fruit calyx lobes up to 18 cm × 5 cm, 3 shorter ones up to 8 mm × 8 mm.

D. rigidus is locally abundant and sometimes semi-gregarious in forest on dry soils on coastal hills. The density of the wood is 705-965 kg/m3 at 15% moisture content.

Selected sources

31, 89, 102, 140, 189, 253, 258, 677, 737, 746, 748.

Main genus page


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