Hopea treubii (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Hopea treubii Heim

Protologue: Bull. Mens. Soc. Linn. Paris 2: 955 (1891).

• Brunei: merawan daun tebal
• Indonesia: gerik kecil daun (Kalimantan)
• Malaysia: merawan daun tebal (Sarawak), marakka (Sabah).

Borneo.

The timber is used as merawan.

• A medium-sized to fairly large tree of up to 35 m tall, bole more or less strongly tapering, with a diameter of up to 80 cm and low flying buttresses, bark surface fissured, deep reddish rust-brown, inner bark hard, yellow-brown, cambium yellowish, sapwood hard, yellow-brown, with an abrupt transition to dark rust-brown heartwood; tree glabrous except for the petals and stylopodium.
• Leaves broadly elliptical to obovate, 5-8 cm × 3-5.5 cm, leathery, base cuneate, acumen broad, up to 5 mm long, margin subrevolute, venation dryobalanoid, midrib slightly raised above, secondary veins about 7 pairs, strongly curved, ascending at 60-70°, with smaller veins in between running almost to margin.
• Stamens 10, subequal, in a single row, anthers broadly oblong, subequal, ovary and stylopodium cylindrical, subtruncate, style short.
• 2 longer fruit calyx lobes up to 3.5 cm × 7 cm, base narrow saccate, 3 shorter ones up to 8 mm × 2 mm, similar at base.

H. treubii occurs locally on deep yellow sandy soils in mixed dipterocarp forest on coastal hills and ridges. The density of the wood is 630-830 kg/m³ at 15% moisture content.

30, 258, 556, 748.

• Hopea (merawan)

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