Dipterocarpus caudiferus (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Dipterocarpus caudiferus Merr.

Protologue: Philipp. Journ. Sc. 29: 398 (1926).

• Dipterocarpus macrorrhinus v. Slooten (1927),
• Dipterocarpus kutaianus v. Slooten (1940).

• Brunei: keruing puteh
• Indonesia: andri, keruing anderi, keruing kutai (Kalimantan)
• Malaysia: keruing puteh (Sarawak, Sabah), keruing laran (Sarawak).

Borneo.

The timber is an important source of keruing.

• A very large tree of up to 65 m tall, bole very tall, straight and cylindrical, up to 160 cm in diameter, buttresses few, up to 3.5 m tall, to 2 m long, and to 12 cm thick, bark surface pale pink-grey to pale brown, appearing smooth, inner bark pale yellow, turning pale yellowish-brown on exposure, hard, sapwood pale yellow, heartwood deep pinkish-brown; buds lanceolate, silky tomentose.
• Leaves elliptical, 11-20 cm × 5-15 cm, base obtuse or cuneate, apex prominently acuminate, secondary veins 12-20 pairs, petiole 3-4 cm long, stipules linear.
• Stamens 25.
• Fruit calyx tube spherical, glabrous, smooth, 2 larger fruit calyx lobes 12-17 cm × 2-3 cm, 3 shorter ones 4-6 mm × 5-7 mm.

D. caudiferus is a common lowland keruing in Borneo and occurs on clay soils in mixed dipterocarp forest on undulating land and hillsides below 800 m altitude. The density of the wood is 510-865 kg/m³at 15% moisture content. The wood is considered poorly resistant to fungal decay, but not difficult to impregnate. See also the table on wood properties.

30, 258, 461, 476, 748, 790.

• Dipterocarpus (Timbers)

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