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Koto
Pterygota macrocarpa K.Schum.
STERCULIACEAE
Koto (Côte d`Ivoire); Ikame (Zaire); Anatolia (Germany); Pterygota (United Kingdom); African pterygota (United Kingdom); Ikema (Zaire); Ake (Gabon); Kakende (Central African Republic); Poroposo (Nigeria); Kefe (Nigeria); Awari (Ghana); Kyere (Ghana); Koto
Pterygota cordifolia A. Chev.
The tree may reach a height of 40 m. The bole is rather straight and cylindrical, clear to 13 to 26 m in length, buttressed to 2 m. The trunk diameter attains 70 to 130 cm.
Pterygota macrocarpa is a common tree of dry forests. It is common in tropical evergreen and mixed deciduous forests.
West Africa.
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel Axial parenchyma in continuous tangential lines or fine bands. Axial parenchyma storied. Prismatic crystals in non-chambered axial parenchyma cells. 3 to 4 cells per parenchyma strand. Rays less than 4 per mm (rare). Rays non-storied. Larger rays more than 4 seriate. Prismatic crystals in the ray cells. Heterogeneous rays and/or multiseriate heterogeneous rays. Non-septate fibers. Fibers with simple to minutely bordered pits.
Unrestricted
The heartwood is creamy white, it is little or not demarcated. The silver figure is large.
7
Straight or slightly interlocked, sometimes with an influence on further processing operations.
This species is reported to have a fine to medium texture.
This wood is frequently high in luster.
Not durable; important risks of decay attacks at any processing step, from logs up to final products. It must receive preservative treatment. Sensible to termites attack. The heartwood is sensible to Lyctus attacks.
5
No residual stresses are reported in this species.
Silica Content: It is reported to have a negligible amount of silica. Contents over 0.05% may affect wood processing. Silica Value: 0.01
Easy to treat with a full penetration of the preservative products using vacuum-pressure method.
0.54
0.59
8.8
3.9
Ease of Drying: Drying is rather slow and sometimes difficult to perform. Drying Defects: Risks of checks and distortions. Kiln Schedules: The kiln schedule has been tested.
FR-7
2.3
981
133923
547
70
67
429
533
It is easy to saw.
Suitable for slicing, also suitable for peeling if treated.
Suitable for slicing, also suitable for peeling if treated.
Slight blunting effect; ordinary tools can be used for sawing and machining.
Machining of this species is reportedly easy.
Easy; no particular problems.
Easy; no particular problems.
Easy; no particular problems.
Easy; no particular problems.
No particular problem.
Glues well if basic gluing technical rules are followed.
Easy to perform; it gives good results.
Can be polished without surface preparation.
Steam bending is difficult.
No particular problems.
HOUSING GENERAL, beams, joists, boards, frames, steps, panelling, fittings, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, Decorative veneer, PACKING, heavy packing, pallets, OTHER AND MUSICAL INSTRUMENTS, handicrafts, door core, coffin, moldings, cementboard
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