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MAHANG (Macaranga hosei)
Trade Name
Mahang
Scientific Name
Macaranga hosei King ex Hook. F.
Family
EUPHORBIACEAE
Common Names
Hoses`s mahang; Sow low (Thailand)
Scientific Name Synonyms
Macaranga pseudopruinosa Pax & K. Hoffm; Macaranga pearsonii Merr.
Description Of The Tree
Botanical Description
It is an evergreen, dioecious, small to medium-sized tree up to 30 m tall. The bole is straight, up to 50 cm in diameter, occasionally with stilt roots, rarely with buttresses.
Natural Habitat
Macaranga is usually a common element of secondary forests.
Plantations Available?
This fast growing species is recommended for plantations in Malaysia.
Non Timber Uses
Medicinal properties are reported, probably due to the tannin content.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Tangential diameter of vessel lumina 200 micras or more (large). Tangential diameter of vessel lumina 100 micras or less (very small). Occasionally tyloses common. Vessels per mm2 5 to 20. Vessels per mm2 less than 6 (rare). Vessel-ray pits Occasionally apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Occasionally prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per parenchyma strand. Rays more than 10 per mm (abundant). Ray height more than 1 mm. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Occasionally body r Fibers very thin walled. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood varies from pale yellow-brown to pale brown or gray-brown, sometimes with a pinkish tinge, not clearly differentiated from the sapwood.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
The grain is straight or slightly interlocked.
Texture
The texture is moderately fine to moderately coarse and even.
Luster
The planed surfaces are lustrous.
Natural Durability
It is moderately resistant to dry-wood termites.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Resistance To Impregnation
This timber can be impregnated without difficulty.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.32
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.34
Total shrinkage Tangential (Saturated to 0%MC) (%)
6.3
Total shrinkage Radial (Saturated to 0%MC) (%)
3.2
Drying Defects
Ease of Drying: Drying is reported to be fairly rapid. Boards of 13 mm and 38 mm thick take respectively 2 months and 4 months to air dry. Drying Defects: Risk of radial splits and slight risk of end-checks.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.0
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
490
Stiffness (MOE) 12%MC (kgf/cm²)
61870
Compression parallel to fiber 12%MC (kgf/cm²)
229
Janka hardness (side) 12%MC (kgf)
146
Workability
Rotary Veneer Cutting
Lamination of this species is possible.
Sliced Veneer
Lamination of this species is possible.
Machining
It is very easy to work but somewhat fibrous.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, frames, PACKING, NAVAL CONSTRUCTION, OTHER AND MUSICAL INSTRUMENTS, shoes, matches, shingle, moldings, particleboard
General Housing
- 10 - Silica in Timbers
Frames
- 16 - Woods of the World
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Shoes
- 70 - Proprietes physiques et mecaniques des bois tropicaux de l`union francaise
Matches
- 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
Shingles
- 77 - Amazonian Timbers, Characteristics and Utilization Volume I; Tapajós National Forest
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
Particleboard
- 80 - Estudio Integral de la Madera para Construcción
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