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PELOS (Harpullia arborea)
Trade Name
Pelos
Scientific Name
Harpullia arborea (Blanco) Radkl.
Family
SAPINDACEAE
Common Names
Lalilali (Sabah); Sakubing (Sabah); Pelos (Indonesia); Apoh (Sarawak); Pelus (Indonesia); Buluan (Indonesia); Uas (Philippines); Krapok ling (Thailand); Hom klai dong (Thailand); Hang kaen (Thailand); Puas (Philippines); Magalad (Philippines)
Scientific Name Synonyms
Harpullia tomentosa Ridley; Harpullia pedicellaris Radlk.; Harpullia imbricata (Blume) Thwaites
Description Of The Tree
Botanical Description
It is a tree to 33 m tall, 60 cm in diameter. The bole is straight to crooked, 80 cm in diameter, sometimes fluted at the base. Occasionally small buttresses up to 2 m high are reported.
Natural Habitat
It is found in primary or secondary rain forest, up to 1,200 m of altitude in a wide range of habitats.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Tangential diameter of vessel lumina 200 micras or more (large). Colored deposits in heartwood vessels. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Axial parenchyma in marginal or in seemingly marginal bands. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma storied. Siliceous bodies in the axial parenchyma cells. A 4 to 10 rays per mm (medium). Rays storied. Larger rays more than 4 seriate. Sheath cells. Silica bodies in the ray cells. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Fibers with distinctly bordered pits. Fibers storied.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is pale brown with a purple-red hue or yellow-brown, not differentiated from the paler sapwood.
Grain
The grain is usually straight or slightly wavy.
Texture
The texture varies from fine to medium.
Natural Durability
It is relatively durable under cover or in protected situations.
Natural durability index (1= Very high durability, 7=Vey low durability)
3
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.63
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.70
Drying Defects
Ease of Drying: Sungkai dries fairly rapidly without serious defects. Boards of 25 mm thick take about 2 months to air dry. Drying Defects: Checking may occur while drying.
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
999
Stiffness (MOE) 12%MC (kgf/cm²)
104091
Compression parallel to fiber 12%MC (kgf/cm²)
470
Compression perpendicular to fiber 12%MC (kgf/cm²)
98
Shear strength radial 12%MC (kgf/cm²)
140
Janka hardness (side) 12%MC (kgf)
572
Janka hardness (end grain) 12%MC (kgf)
826
Workability
Rotary Veneer Cutting
This species is reported to have good characteristics for lamination.
Sliced Veneer
This species is reported to have good characteristics for lamination.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, FURNITURE AND CABINETS, PLYWOOD AND VENEER, PACKING
General Housing
- 10 - Silica in Timbers
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
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