Dipterocarpus tempehes (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Dipterocarpus tempehes v. Slooten

Protologue: Reinwardtia 5: 468, f. 4 (1961).

Vernacular names

• Indonesia: keruing tempehes (general), bayan (South Kalimantan), karup (East Kalimantan)
• Malaysia: keruing assam (Sabah), keruing tepayang (Sarawak).

Distribution

Borneo.

Uses

D. tempehes is an important source of keruing timber in Sabah and parts of Sarawak, less so elsewhere.

Observations

• A medium-sized to large tree of up to 45 m tall, bole up to 110 cm in diameter, buttresses up to 2 m tall, up to 3 m long, about 10 cm thick, bark surface flaky, yellow-brown, papery, outer bark pale greyish-brown, inner bark reddish-brown, sapwood pale ochre; buds lanceolate, buff pubescent.
• Leaves broadly elliptical to obovate, 6-12 cm × 3.5-8 cm, with broadly cuneate base and acute to shortly abruptly acuminate apex, with 9-12 pairs of sharply ascending secondary veins, petiole 1-2 cm long, stipules lorate, acute, outside shortly buff pubescent.
• Stamens about 30.
• Fruit calyx tube glabrous, turbinate, with unraised but prominent pale lenticels, the 5 calyx lobes vestigial.

D. tempehes is locally abundant and occurs on flat, low-laying clay soils, generally near freshwater swamps or on stream banks. The density of the wood is 530-805 kg/m³at 15% moisture content.

Selected sources

31, 258, 466, 476, 746, 748.

Main genus page

• Dipterocarpus (Timbers)

Authors

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