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MEMPISANG (Polyalthia rumphii)
Trade Name
Mempisang
Scientific Name
Polyalthia rumphii (Blume ex Hensch.) Merr.
Family
ANNONACEAE
Common Names
Pamelesian (Indonesia); Sang yu (Thailand); Merpadi (Malaysia); Rumphius` lanutan (Philippines)
Scientific Name Synonyms
Polyalthia scortechinii King; Polyalthia kunstleri King; Polyalthia canangioides (Rchb.f. & Zoll.) Boerl; Guatteria rumphii Blume ex Hensch.
Description Of The Tree
Botanical Description
It is a small to medium sized, rarely a large tree up to 40 m high on average, up to 60 cm in diameter. The bole is straight, occasionally fluted at the base or with small buttresses.
Natural Habitat
Polyalthia species occur scattered as understorey or main canopy trees, in primary or secondary lowland to lower montane rain forests, up to 1,200 m of altitude.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Tangential diameter of vessel lumina 100 micras or less (very small). Occasionally vessels with colored deposits. Vessels per mm2 5 to 20. Occasionally vessels per mm2 more than 20. Occasionally vessels per mm2 less than 6. Simple perforati Occasionally paratracheal axial parenchyma scanty and/or vasicentric. Occasionally two cells per parenchyma strand. 3 to 4 cells per parenchyma strand. Occasionally 5 to 8 cells per parenchyma strand. Axial parenchyma in narrow bands on lines up to 3 cells wi 4 to 10 rays per mm (medium). Rays less than 4 per mm (rare). Rays of two distinct sizes. Ray height more than 1 mm. Occasionally larger rays more than 4 seriate. Larger rays more than 4 seriate. Prismatic crystals in radial alignment in procumbent ray cells (c Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is yellow to yellowish-brown with a green or pink tinge, not clearly differentiated from the pale yellow sapwood.
COLOR INDEX (1=Black, 7=Light yellow,white)
6
Grain
The grain is frequently straight.
Texture
The texture varies from moderately coarse to fine.
Natural Durability
The wood is non-durable and needs chemical treatment to prevent stain immediately after sawing.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Resistance To Impregnation
It is difficult to impregnate.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.51
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.56
Total shrinkage Tangential (Saturated to 0%MC) (%)
5.2
Total shrinkage Radial (Saturated to 0%MC) (%)
2.0
Drying Defects
Ease of Drying: Drying is rather slow and sometimes difficult to perform. Drying Defects: Risks of checks.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.6
Wood Chemical Properties
Wood Mechanical Properties
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, frames, panelling, FURNITURE AND CABINETS, PLYWOOD AND VENEER, SPORTS, TOOLS, tool handles, PACKING, NAVAL CONSTRUCTION, boat oars, OTHER AND MUSICAL INSTRUMENTS, handicrafts, shoes, matches, moldings
General Housing
- 10 - Silica in Timbers
Frames
- 16 - Woods of the World
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Sports
- 38 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Boat Oars
- 60 - Amazonian Timbers, Characteristics and Utilization Volume II; Curuá-Una Experimental Forest Station
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Shoes
- 70 - Proprietes physiques et mecaniques des bois tropicaux de l`union francaise
Matches
- 71 - Proprietes physiques et mecaniques des bois tropicaux, premier supplement
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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