Hopea dyeri (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Hopea dyeri Heim

Protologue: Bull. Mens. Soc. Linn. Paris 2: 972 (1891).

Synonyms

• Hopea intermedia King (1893) p.p.,
• Hopea micrantha Burck (1887) non Hook.f. p.p.,
• Hopea pierrei Brandis (1895) non Hance.

Vernacular names

• Indonesia: bangkirai tanduk (South Kalimantan), omang terubuk, emang besi (West Kalimantan)
• Malaysia: merawan palit (Peninsular), selangan kechil (Sabah), selangan palit (Sarawak).

Distribution

Peninsular Malaysia and Borneo.

Uses

The timber is used as merawan. The tree is also a source of dammar.

Observations

• A medium-sized to fairly large tree of up to 35 m tall, bole straight, tapering, with a diameter of up to 60 cm and thin, low buttresses and stilt roots, bark surface flaky with a red layer beneath, inner bark homogeneous pale pink-brown to yellowish-brown, sapwood pale yellow, heartwood brown; younger parts grey-brown pubescent.
• Leaves ovate-lanceolate, 2.5-7 cm × 1.2-2.5 cm, somewhat leathery, base cuneate, subequal, acumen narrow, up to 1.5 cm long, margin frequently slightly revolute, frequently lepidote beneath, venation dryobalanoid, midrib raised on both surfaces, secondary veins 8-12 pairs, slender, slightly raised, with many distinct smaller veins.
• Stamens 15, in 3 whorls, ovary and stylopodium pear-shaped, apex puberulent, style short.
• 2 longer fruit calyx lobes up to 2.5 cm × 1 cm, narrowly obtuse, 3 shorter ones up to 7 mm × 4 mm, ovate, acuminate.

H. dyeri is locally abundant and occurs on well-drained soils on low hills and ridges up to 1000 m altitude. The density of the wood is 575-915 kg/m³ at 15% moisture content.

Selected sources

30, 76, 89, 100, 102, 253, 258, 318, 476, 677, 748.

Main genus page

• Hopea (merawan)

Authors

• K.M. Kochummen (selection of species),
• F.T. Frietema (selection of species)