Shorea foxworthyi (PROSEA)

Plant Resources of South-East Asia Introduction

List of species

Shorea foxworthyi Sym.

Protologue: Gard. Bull. Str. Settl. 8: 272, pl. 19 (1935).

Synonyms

• Shorea collina Foxw. (1927) non Ridley.

Vernacular names

• Brunei: selangan batu bukit
• Indonesia: amperok, lukan (Kalimantan), damar laut daun besar (Sumatra)
• Malaysia: balau bukit (Peninsular), selangan batu bersisek (Sabah), selangan batu kuning (Sarawak)
• Thailand: takien rak (peninsular).

Distribution

Peninsular Thailand, Peninsular Malaysia, north-eastern Sumatra and Borneo.

Uses

The wood is an important source of balau.

Observations

• A very large tree up to 60 m tall with bole up to 125 cm in diameter and tall buttresses up to 4.5 m high, branches golden-tawny pubescent.
• Leaves elliptical, 8-13 cm × 3-6.5 cm, with 10-14 pairs of secondary veins very prominent beneath.
• Petals narrow, stamens 32-41, filaments barbate.
• Fruit calyx lobes large, unequal, larger three up to 10 cm × 2.5 cm.

S. foxworthyi prefers low-lying, undulating land or hills below 700 m altitude and sandy clay soils. The density of the wood is 855-1090 kg/m³ at 15% moisture content.

Selected sources

31, 253, 258, 628, 677, 748.

Main genus page

• Shorea (balau)

Authors

• M.S.M. Sosef (selection of species)