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SIMPOH (Dillenia papuana)
Trade Name
Simpoh
Scientific Name
Dillenia papuana Martelli
Family
DILLENIACEAE
Common Names
Kamyemeye (Indonesia); Mayonga (West Irian); Mayonga (Indonesia); Kaigabar (Indonesia)
Scientific Name Synonyms
Wormia papuana (Martelli) Gilg & Werderm.; Wormia calothyrsa (Diels) Gilg & Werderm.; Dillenia calothyrsa Diels
Description Of The Tree
Botanical Description
It is a medium-sized to large evergreen tree up to 40 m tall, with bole branchless for up to 20 m and up to 100 cm in diameter, with or without buttresses.
Natural Habitat
Dillenia papuana is found in primary forests at low altitude, rarely up to 2,000 m of altitude.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels exclusively solitary (over 90%). Vessels per mm2 5 to 20. Vessel-ray pits reticulate and/or foraminate. Vessel-ray pits similar to intervessel pits in size and shape. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Axial parenchyma scalariform. Larger rays more than 4 seriate. Sheath cells. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Fibers with distinctly bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is red-brown to dark reddish-brown, sometimes with a purplish tinge, and usually not demarcated from the slightly paler sapwood.
COLOR INDEX (1=Black, 7=Light yellow,white)
4
Grain
The grain is straight or, more usually, interlocked.
Texture
The texture is moderately coarse and even.
Natural Durability
The wood is susceptible to dry-wood termites, blue stain and decay fungi.
Natural durability index (1= Very high durability, 7=Vey low durability)
4
Silica Content
Silica Content: It contains 0.1% silica.
Resistance To Impregnation
It can be readily impregnated with preservative substances.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.60
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.66
Total shrinkage Tangential (Saturated to 0%MC) (%)
8.8
Total shrinkage Radial (Saturated to 0%MC) (%)
4.1
Drying Defects
Ease of Drying: The wood dries fairly slowly. Boards 15 mm thick take 2.5 to 4 months to air dry from green to 15% moisture content. Drying Defects: Slight bowing and staining are reported. Kiln Schedules: Schedule recommended for Litsea.
Recommended Dry Kiln Schedule
UK-C
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.1
Wood Chemical Properties
Wood Mechanical Properties
Workability
Sawing
Sawdust can block the blades.
Rotary Veneer Cutting
It possible to produce decorative sliced veneer.
Sliced Veneer
It possible to produce decorative sliced veneer.
Machining
This species is easy to machine.
Planing
It is easy to plane.
Boring
Boring operations are reported to be easy to fair.
Nailing
It needs pre-bore for nails, but it screws well. The nail holding properties are poor.
Gluing
Gluing of this species is easy.
Finishing
Finishing of this wood is rated as fair.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, panelling, PLYWOOD AND VENEER, OTHER AND MUSICAL INSTRUMENTS, moldings
General Housing
- 10 - Silica in Timbers
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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