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KAYU KUNDUR (Mastixia pentandra)

Trade Name

Kayu kundur

Scientific Name

Mastixia pentandra Blume

Family

CORNACEAE

Common Names

Balikbikan (Philippines); Kayu wulu (Brunei Darussalam); Medang surungan (Brunei Darussalam); Huru lilin (Indonesia); Mengkapas (Indonesia); Kayu wulu (Malaysia); Medang surungan (Sabah); Medang surungan (Sarawak); Medang pisang (Malaysia); Bakan (Philippines); Tenyau (Indonesia); Apanit (Philippines)

Scientific Name Synonyms

Mastixia scortechinii King; Mastixia poilanei Tardieu; Mastixia philippinensis Wangerin

Description Of The Tree

Botanical Description

It is a very large tree, up to 40 m tall, 80 cm diameter. The buttresses are short.

Natural Habitat

This species is generally found scattered in primary and secondary forests in valleys, on slopes or ridges, up to 2,400 m of altitude.

Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Occasionally tangential diameter of vessel lumina 100 micras or less. Vestured pits. Occasionally vessels per mm2 more than 20. Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Occasionally intervess Occasionally axial parenchyma absent or extremely rare, non visible with magnifying glass (8x). Occasionally apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Occasionally two cells pe 4 to 10 rays per mm (medium). Occasionally larger rays more than 4 seriate. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Occasionally body ray cells procumbent with one row of upright and/or square mar Septate fibers present. Fibers with simple to minutely bordered pits.

  • Wood Macro Photo Radial Plane
  • Wood Micro Photo Of Transversal Section

Availability

Cites Status

Unrestricted

General Wood Description

Color

The heartwood varies from straw-colored to yellow with a greenish tinge, not clearly differentiated from the white to pale yellow sapwood.

COLOR INDEX (1=Black, 7=Light yellow,white)

5

Grain

The grain is straight or slightly interlocked.

Texture

The texture of the wood is fine.

Natural Durability

M. pentandra has low resistance against decay and wood insects attack.

Natural durability index (1= Very high durability, 7=Vey low durability)

5

Resistance To Impregnation

It is easy to preserve.

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.53

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

0.58

Drying Defects

Ease of Drying: The boards of S. ceramica dry rapidly without much degrade. Drying Defects: The wood is sometimes prone to collapse, checking, cupping and warping.

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

1009

Stiffness (MOE) 12%MC (kgf/cm²)

120242

Compression parallel to fiber 12%MC (kgf/cm²)

499

Compression perpendicular to fiber 12%MC (kgf/cm²)

61

Shear strength radial 12%MC (kgf/cm²)

102

Janka hardness (side) 12%MC (kgf)

606

Janka hardness (end grain) 12%MC (kgf)

412

Workability

Sawing

Sawing of this species is reported to be rather easy.

Machining

It is easy to machine, giving a smooth surface.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, shutter boards, PACKING, pallets

General Housing
  • 10 - Silica in Timbers
Shutter Boards
  • 20 - Prospect: The wood database
Packing
  • 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Pallets
  • 48 - The strength properties of timbers

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