Dipterocarpus chartaceus (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Dipterocarpus chartaceus Sym.

Protologue: Gard. Bull. Str. Settl. 9: 322 (1938).

Synonyms

• Dipterocarpus skinneri auct. non King p.p.

Vernacular names

• Malaysia: keruing kertas, keruing bulu, getah (Peninsular)
• Thailand: yang-wat (general), yang-sian, yang-tang (peninsular).

Distribution

Peninsular Thailand and Peninsular Malaysia.

Uses

The timber is currently used as keruing. D. chartaceus is tapped for wood-oil which is used for varnish, caulking boats and illumination.

Observations

• A medium-sized to fairly large tree of up to 40 m tall, bole with a diameter of up to 125 cm, buttresses absent, bark surface fissured, greyish-brown, scaly, sapwood rapidly becoming covered with oil; buds lanceolate-falcate, densely golden pubescent.
• Leaves elliptical-ovate or rarely obovate, 8.5-19 cm × 4-9 cm, base cuneate, acumen to 1 cm long, secondary veins 10-12(-14) pairs, ascending, petiole 2.5-3 cm long, stipules lorate-lanceolate, short yellow pubescent.
• Stamens 30.
• Fruit calyx tube glabrescent, subglobose, smooth, 2 larger fruit calyx lobes up to 13 cm × 3 cm, 3 shorter ones up to 4 mm × 4 mm.

D. chartaceus is comparatively rare and occurs in lowland dipterocarp forest or semi-swamp forest up to 600 m altitude. The density of the wood is 705-755 kg/m³at 15% moisture content.

Selected sources

258, 264, 514, 628, 644, 677, 737, 748, 799.

Main genus page

• Dipterocarpus (Timbers)

Authors

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