Dipterocarpus humeratus (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Dipterocarpus humeratus v. Slooten

Protologue: Bull. Jard. Bot. Buitenzorg, sér. 3, 8: 308, f. 4 (1927).

Dipterocarpus gibbosus v. Slooten (1927), Dipterocarpus ursinus v. Slooten (1961).

• Brunei: keruing latek bukit, keruing latek (Malay), ran (Iban)
• Indonesia: jelatong bulan, lagan (Sumatra)
• Malaysia: keruing kerukup (Sabah), keruing latek bukit (Sarawak).

Northern and eastern Sumatra and Borneo.

The timber is used as keruing.

A large tree of up to 50 m tall, bole tall, straight, cylindrical, up to 110 cm in diameter, buttresses up to 2 m tall, up to 8 cm thick, bark surface pink-brown, smooth, outer bark thin, inner bark dull pinkish-brown, sapwood pale ochre; buds narrowly conical, fulvous tomentose; leaves broadly ovate, 20-38 cm × 12-23 cm, base obtuse, apex obtuse to shortly acuminate, secondary veins about 20 pairs, beneath persistently shortly pubescent, petiole 4-6 cm long, stipules narrowly lanceolate, obtuse, outside long fulvous tomentose; stamens about 40; fruit calyx tube globose, glabrous, with 5 obtuse tubercles, 2 longer fruit calyx lobes up to 18 cm × 5 cm, 3 shorter ones up to 1.5 cm × 1.5 cm. D. humeratus occurs scattered or semi-gregariously on undulating land and clay ridges below 700 m altitude. The density of the wood is 730-800 kg/m³at 15% moisture content.

30, 31, 258, 469, 476, 737, 746, 748.