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Kayu lemah
Zanthoxylum rhetsa
RUTACEAE
Kayu lemah (Indonesia); Cosc hooi (Vietnam); Caay hoafng moojc hooi (Vietnam); Kaitana (Philippines); Kasabang (Philippines); Indian ivy-rue; Kayu tanah (Indonesia); Kayutana (Philippines); Khen (Laos); Kathit-pyu (Myanmar); Ma khuang (Thailand); Luk ra mat (Thailand); Kamehat ton (Thailand); Khouang (Laos); Hantu duri (Malaysia)
Zanthoxylum limonella (Dennst) Alston; Zanthoxylum budrunga (Roxb.) DC.; Fagara rhetsa Roxb.
Small to medium sized tree, up to 20 m tall and 120 to 150 cm in diameter, without buttresses.
Zanthoxylum rhetsa is reported in primary and secondary forests, up to 500 m of altitude. It prefers rather dry, often monsoon forests.
Wood diffuse porous. Occasionally tangential diameter of vessel lumina 100 micras or less. Colored deposits in heartwood vessels. Vessels per mm2 5 to 20. Vessels per mm2 more than 20 (very abundant). Simple perforation plates. Vessel-ray pits similar to interv Axial parenchyma in marginal or in seemingly marginal bands. Occasionally paratracheal axial parenchyma scanty and/or vasicentric. Occasionally prismatic crystals in chambered axial parenchyma cells and/or in fibers. Occasionally two cells per parenchyma str 4 to 10 rays per mm (medium). Rays less than 4 per mm (rare). Occasionally larger rays more than 4 seriate. Occasionally body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Occasionally septate fibers present. Fibers with simple to minutely bordered pits.
Unrestricted
The heartwood is bright yellow to pale brown, not clearly differentiated from the pale brown sapwood.
This species is reported to have straight grain.
Texture is mostly fine to moderately fine and even.
This wood is frequently lustrous.
The heartwood is resistant to dry-wood termites and moderately resistant to fungi.
3
0.33
0.35
5.6
3.5
Ease of Drying: Drying is rather slow and sometimes difficult to perform. Drying Defects: Risks of checks. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
1.6
593
82030
295
32
56
171
272
It is easy to machine.
It has a good finishing.
The wood responds well to hand tools.
HOUSING GENERAL, joists, boards, FURNITURE AND CABINETS, TOOLS, tool handles, OTHER AND MUSICAL INSTRUMENTS, handicrafts
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