Wrightia arborea (Dennst.) Mabb.
Thng mc lng (Vietnam); Mc lng (Vietnam); Mok man (Thailand); Taung salat (Myanmar); Letthoke (Myanmar)
Wrightia tomentosa (Roxb.) Roem. & Schult.; Periploca arborea Dennst.; Nerium tomentosum Roxb.
It is a small to medium-sized tree up to 20 m tall. The bole is up to 35 cm in diameter.
This species is fairly common in deciduous forests and thickets, often along streams, up to 1,650 m of altitude.
W. arborea contains an indigo yielding glucoside in the seeds, roots and leaves.
Tangential diameter of vessel lumina 100 micras or less (very small). Vestured pits. Vessels per mm2 more than 20 (very abundant). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits small, 7 micras or les Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. 5 to 8 cells per parenchyma strand. Rays more than 10 per mm (abundant). Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Fibers with simple to minutely bordered pits.
The heartwood is creamy white to pale yellow, sometimes with a pinkish tinge.
This timber usually has straight to slightly interlocked grain.
The wood is mostly fine in texture.
This wood is frequently lustrous.
It has a low to very low resistance against biological degrade.
Treatments either with oil or salt based preservatives give unsatisfactory results.
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: Risks of checks. Kiln Schedules: The kiln schedule has been tested.
Cutting resistance is generally low.
Machining of this species is reported to be easy.
This species is reported to be easy to work with hand tools.
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