Dipterocarpus verrucosus (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Dipterocarpus verrucosus Foxw. ex v. Slooten

Protologue: Bull. Jard. Bot. Buitenzorg, sér. 3, 8: 293 (1927).

• Brunei: keruing merah
• Indonesia: keruing beras (Kalimantan, Sumatra), ariung (East Kalimantan, Sumatra), bajan halus daun (South Kalimantan)
• Malaysia: keruing merah (general), keruing chayer, keruing terenek (Peninsular).

Peninsular Malaysia, Sumatra and Borneo.

D. verrucosus is an important source of keruing timber, especially in Brunei and parts of Peninsular Malaysia. A wood-oil can be obtained from the bole.

• A large to very large tree of up to 60 m tall, bole straight, cylindrical, branchless for up to 35 m, up to 160 cm in diameter, buttresses up to 2 m tall, broad, bark surface flaky, uniform pale orange-brown or buff; buds narrowly falcate to narrowly conical, adpressed tufted golden-brown pubescent.
• Leaves ovate, 6-12 cm × 3.5-6 cm, base cuneate, apex subacute or with an up to 5 mm long acumen, secondary veins 9-14 pairs, prominent, glabrous, petiole 1-2 cm long, stipules narrowly oblong, obtuse, outside sparsely pubescent.
• Stamens 15.
• Fruit calyx tube globose to slightly ovoid, smooth but verrucose lenticelled, glabrescent, 2 larger fruit calyx lobes up to 9 cm × 2 cm, 3 shorter ones up to 3 mm × 2 mm.

D. verrucosus is locally frequent or semi-gregarious and occurs in mixed dipterocarp forest on clay-rich soil, with a preference for ridges below 650 m altitude. The density of the wood is 675-920 kg/m³ at 15% moisture content. See also the table on wood properties.

30, 31, 140, 253, 258, 297, 417, 461, 476, 677, 737, 748.

• Dipterocarpus (Timbers)

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