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LAMBARAN (Cathormion umbellatum)
Trade Name
Lambaran
Scientific Name
Cathormion umbellatum (M. Vahl) Kosterm.
Family
Leguminosae
Common Names
Rakam pa (Thailand); Sambu:e sa:r (Cambodia); Lambaran (Indonesia); Lom (Indonesia); Kiutasi (Indonesia); Tieem (Vietnam); Me daast (Vietnam); Ma kham khaek (Thailand)
Scientific Name Synonyms
Pithecellobium umbellatum (Vahl) Benth.; Pithecellobium moniliferum (DC) Benthe.; Pithecellobium malayanum Pierre
Description Of The Tree
Botanical Description
It is a small, sometimes medium-sized tree up to 15 m tall. The bole is often short, crooked, up to 60 cm in diameter.
Natural Habitat
This species usually occurs in coastal regions, in particular on the drier parts of the mangrove forests and along the seashore up to 1,500 m of altitude.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Tangential diameter of vessel lumina 200 micras or more (large). Colored deposits in heartwood vessels. Vestured pits. Vessels per mm2 5 to 20. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to interve Occasionally apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Occasionally paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Axial parenchyma confluent. Prismatic crystals in chambered axial parenchyma cells 4 to 10 rays per mm (medium). Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Septate fibers present. Crystals in fibers. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is pale to dark brown, sharply demarcated from the white to yellowish-white sapwood.
Grain
The grain is reported to be straight or wavy.
Texture
The texture varies from moderately coarse to coarse and even.
Natural Durability
It is slightly durable in contact with the ground or exposed to the weather, but durable when used under cover.
Natural durability index (1= Very high durability, 7=Vey low durability)
3
Wood Physical Properties
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.78
Drying Defects
Ease of Drying: Air seasoning is fairly easy. Drying Defects: Tendency to check and split in air drying.
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1467
Stiffness (MOE) 12%MC (kgf/cm²)
171624
Compression parallel to fiber 12%MC (kgf/cm²)
830
Shear strength radial 12%MC (kgf/cm²)
199
Janka hardness (side) 12%MC (kgf)
703
Workability
REFERENCED USES
End Uses Summary
HOUSING GENERAL
General Housing
- 10 - Silica in Timbers
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