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MEMPISANG (Mezzettia parviflora)
Trade Name
Mempisang
Scientific Name
Mezzettia parviflora Becc.
Family
ANNONACEAE
Common Names
Kepayang burong (Sarawak); Bayut batu (Indonesia); Kepayang burong (Malaysia); Foki-foki (Indonesia); Hua tao (Thailand); Bongkoi (Sabah); Empanyit selapatan (Indonesia); Empanyit selapatan (Borneo); Bayut batu (Sumatra)
Scientific Name Synonyms
Mezzettia leptopoda (Hook. f. & Thomson) Oliv.; Mezzettia herveyana Oliv.; Mezzettia curtisii King; Mezzettia leptopoda Oliv.
Description Of The Tree
Botanical Description
It is an evergreen, small to large tree up to 45 m tall. The bole is straight, cylindrical, branchless for up to 25 m, up to 80 cm in diameter. It is sometimes fluted or with small buttresses up to 60 cm high.
Natural Habitat
Mezzettia parviflora is reported in evergreen primary lowland forests up to 500 m of altitude. It is usually found in dipterocarp forests, swamp forests and kerangas.
Non Timber Uses
Extracts of Mempisang wood are reported to have insecticide properties.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Tangential diameter of vessel lumina 200 micras or more (large). Vessels per mm2 5 to 20. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits medium, Paratracheal axial parenchyma scanty and/or vasicentric. Two cells per parenchyma strand. 3 to 4 cells per parenchyma strand. 5 to 8 cells per parenchyma strand. Axial parenchyma in narrow bands on lines up to 3 cells wide. Rays less than 4 per mm (rare). Ray height more than 1 mm. Occasionally larger rays more than 4 seriate. Larger rays more than 4 seriate. Occasionally oil and/or mucilage cells associated with the axial and/or ray parenchyma (idioblasts). Occasionally body ray Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is yellow-brown, sometimes moderately sharply differentiated from the paler sapwood.
COLOR INDEX (1=Black, 7=Light yellow,white)
6
Grain
The grain is usually straight.
Texture
The texture is rather coarse and uneven.
Natural Durability
The wood is non-durable and susceptible to sap-stain, but apparently fairly resistant to insect attack when dry.
Natural durability index (1= Very high durability, 7=Vey low durability)
6
Resistance To Impregnation
The wood absorbs copper-chrome-arsenic (CCA) preservatives readily when treated under pressure.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.58
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.64
Total shrinkage Tangential (Saturated to 0%MC) (%)
8.5
Total shrinkage Radial (Saturated to 0%MC) (%)
4.1
Drying Defects
Ease of Drying: Boards of 13 mm and 38 mm thick take respectively about 3 months and 6 months to air dry. Drying Defects: Insect attack and cupping and bowing are the main sources of degrade.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.0
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
922
Stiffness (MOE) 12%MC (kgf/cm²)
144010
Compression parallel to fiber 12%MC (kgf/cm²)
530
Compression perpendicular to fiber 12%MC (kgf/cm²)
51
Shear strength radial 12%MC (kgf/cm²)
92
Janka hardness (side) 12%MC (kgf)
379
Workability
Machining
This species is easy to machine.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, boards, PLYWOOD AND VENEER, PACKING, OTHER AND MUSICAL INSTRUMENTS, matches
General Housing
- 10 - Silica in Timbers
Boards
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Matches
- 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
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