P.N.G swamp box
Lophostemon confertus (R. Br.) Peter G. Wilson & Waterhouse
Pelawan; Selunsur (Sarawak); Bruh box (Australia)
Tristania conferta R. Br.
It is a small to medium-sized tree up to 40 m tall. The bole is straight, occasionally crooked, up to 100 cm in diameter.
Lophostemon trees occur as mature residual trees in lowland rain forests, and commonly extended to wet and moist open forest, usually along water courses.
This species is reported to be planted in the tropics outside its origin, including Indonesia and Java.
Wood diffuse porous. Vessels in radial multiples of 4 or more common. Tangential diameter of vessel lumina 100 micras or less (very small). Occasionally vessels with colored deposits. Vestured pits. Occasionally vessels per mm2 more than 20. Vessels per mm2 mor Occasionally axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Occasionally paratracheal axial parenchyma scanty and/or vasicentric. Two cells per parenchyma strand. 3 to 4 cells per parenchy 4 to 10 rays per mm (medium). Rays more than 10 per mm (abundant). Rays exclusively uniseriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III) Fibers with simple to minutely bordered pits.
Seasoned wood has no characteristic odor or taste.
The heartwood is red, pink-brown or red-brown, turning grayish upon exposure, clearly demarcated from the pale brown or pale pink sapwood.
The grain is interlocked, sometimes wavy.
The wood texture is frequently fine, occasionally medium.
It is fairly durable to durable in contact with the ground or exposed to weather. It is resistant to termite and marine borer attack.
The sapwood is reported to be easy to preserve but the heartwood is untreatable.
Ease of Drying: Boards of 13 mm and 38 mm thick take respectively 2 months and 3 to 4 months to air dry. Drying Defects: The sapwood is prone to stain and there is a slight risk of cupping.
Sawmilling is reportedly easy.
Machining operations are rather difficult.
Planing operations are reported to be good provided a low cutting angle is used to reduce picking up of fibers in material with interlocked grain. Plantation grown material works somewhat easier.
Molding operations are rather as fair to difficult.
This species is easy to bore.
Mortising operations are fair to difficult.
Nailing properties are poor.
Finishing of this species is reportedly good.
It has a poor response to hand tools.
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