Dyera spp. (Apocynaceae)
Light Hardwood. Major species include D. costulata and D. polyphylla. Also known as Jelutong (Brunei); Jelutung (Indonesia); and Jelutong, Teen-pet daeng and Yelutong (Thailand).
- Density: 420-500 kg/m3
- Heartwood: not distinguished
- Sapwood: creamy white to pale straw-coloured
- texture is moderately fine and even, with almost straight grain
- nailing property is excellent
- The logs are generally free from common defects. However, logs that have been damaged through bad and careless tapping are liable to fungal and insects infestation. Such attacks also occur in logs that have been left for some time in the forest after felling. Sap-stain fungi and ambrosia beetles are known to attack the logs (Desch, 1941). These attacks result in blue stains and tunnels in the log. Freshly sawn timbers are also prone to mould, blue stain and insect attacks. In some instances, the attack may occur few hours after sawing.
Jelutong is the favourite timber for pencil manufacture. It is also suitable for plywood, packing boxes and crates, pattern making, carving works, disposable chopsticks, tooth picks, picture frames, drawing boards, black boards, battery separators, toys and wooden shoe heels.