Lithocarpus celebicus (Miq.) Rehder
S[ox]I (Vietnam); Ko muu (Thailand); Ko (Thailand); New Guinea oak (Papua New Guinea); Ulaian (Philippines); Pasang (Indonesia); Oak (Philippines)
A medium-sized tree up to 33 m tall, bole up to 100 cm in diameter, with buttresses up to 1m high, bark surface fissured to scaly, /grey-brown.
L. celebicus is locally common in lowland and lower montane forest, on clayey soils, up to 800(-1200)m altitude.
Ulaian is a medium density, strong and moderately durable timber which makes is suitable for general house construction, furniture and cabinets. It can also be used for sliced veneer, pulpwood and sticks.
Wood diffuse porous. Occasionally vessels in diagonal and/or radial pattern. Vessels per mm2 6 to 10 (medium). Vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 to 200 micras. Simple perforation plates. Non-vestu Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Axial parenchyma in discontinuous tangential lines. Axial parenchyma in narrow bands on lines up to 3 cells wide. Occasionally 5 to 8 cells per parenchyma strand. Prismatic crystals Rays of two distinct sizes. 4 to 10 rays per mm (medium). Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Occasionally larger rays more than 4 seriate. Occasionally larger rays width 0. 1 mm or more and 2 mm or more in hei Non-septate fibers. Fibers very thick walled. Fibers with distinctly bordered pits.
The heartwood is greyish-brown to brown or brown-red to pinkish-brown, sometimes with yellow tinge, the sapwood is brown or pale brown to straw-colored.
Straight to slightly wavy, sometimes interlocked.
Texture is slightly coarse to coarse and uneven.
Lithocaropus is rated as moderately double; stake tests show an average service life in contact with the ground of 3.7 years under tropical conditions.
sapwood is moderately, heartwood is resistant to impregnation.
Ease of Drying: Sa is prone to end splitting and the application of end seals is recommended,especially for the thicker sizes.Backsawn stock is susceptable to severe surface checking. Quartersawn material dried quite satisfactrily. Preliminary air drying under cover to 2
Good machining property, Class 2
HOUSING GENERAL, beams, parquet, frames, FURNITURE AND CABINETS, TOOLS, tool handles, agricultural tools, CONTAINERS