Dipterocarpus dyeri (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Dipterocarpus dyeri Pierre

Protologue: Lanessan, Pl. util. colon. franç.: 297 (1886).

Vernacular names

• Malaysia: keruing etoi, keruing daun besar (Peninsular)
• Burma: kanyin thi
• Cambodia: chhë: ti:ël chngâ:(r), chhë: ti:ël pruhs, chngâ:(r)
• Thailand: yang-klong (general), yang-man-mu, yang-sian (peninsular)
• Vietnam: dầu song nàng.

Distribution

Burma, Cambodia, Vietnam, Thailand and Peninsular Malaysia.

Uses

The timber is used as keruing. Wood-oil is tapped from the bole.

Observations

• A medium-sized to fairly large semi-deciduous tree of up to 40 m tall, bole branchless for up to 25 m and up to 125 cm in diameter, buttresses low, bark surface pale grey or blackish-brown, outer bark yellowish-brown; buds ovoid-lanceolate, rufous silky velutinous.
• Leaves narrowly ovate to elliptical, 16-40 cm × 7.5-14 cm, base broadly cuneate to subcordate, acumen up to 5 mm long, secondary veins 24-30 pairs, ascending, midrib above sparsely velutinous, below caducously sparsely velutinous, petiole 4-6 cm long, stipules lanceolate, subacute, persistently velutinous outside.
• Stamens about 30.
• Fruit calyx tube ellipsoid, glabrous, with 5 narrow ridges running from the apex along 2/3 of the length of the tube, 2 larger fruit calyx lobes up to 20 cm × 5.5 cm, 3 shorter ones up to 15 mm × 6 mm.

D. dyeri occurs in semi-evergreen dipterocarp forest and Schima-bamboo forest, often along streams, on swamp edges or in valleys at low elevation. The density of the wood is 630-830 kg/m³at 15% moisture content.

Selected sources

102, 140, 162, 235, 258, 628, 677, 748, 799.

Main genus page

• Dipterocarpus (Timbers)

Authors

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