Dipterocarpus applanatus (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Dipterocarpus applanatus v. Slooten

Protologue: Bull. Jard. Bot. Buitenzorg, sér. 3, 16: 443, f. 5 (1940).

• Indonesia: kekalup, keruing arong, lasang (East Kalimantan)
• Malaysia: keruing daun besar (Sabah), keruing arong (Sarawak).

Borneo.

The timber is used as keruing.

• A large tree of up to 50 m tall, bole up to 160 cm in diameter, buttresses stout, up to 3 m tall, up to 2.5 m long, bark surface pale orange-brown, outer bark thin, brown, inner bark dark orange-brown, sapwood yellow, grading to a very hard orange-brown heartwood; buds broadly ellipsoid to falcate, tomentose.
• Leaves broadly elliptical, undulate, 12-30 cm × 9-20 cm, glabrous, base obtuse to subcordate, apex abruptly acuminate, secondary veins 11-15 pairs, petiole 3.5-6 cm long, caducously shortly pubescent at base, stipules oblong, obtuse, concave.
• Fruit calyx tube ovoid, 5-ribbed, glabrous, 2 larger fruit calyx lobes up to 19 cm × 4.5 cm, 3 shorter ones up to 1 cm × 1 cm.

D. applanatus is locally common on sandy soils on sandstone, especially in valleys and on flat land near coasts. The density of the wood is 640-960 kg/m³at 15% moisture content content.

31, 258, 476, 748.

• Dipterocarpus (Timbers)

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