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Eyoum
Dialium pachyphyllum Harms
LEGUMINOSAE
Pau veludo (Guinea-Bissau); Kofina (Côte d`Ivoire); Afambéou (Côte d`Ivoire); Kasudu (Zaire); Bongola (Zaire); Omvong (Gabon); Eyoum (Gabon); Penzi (Congo); Mfang (Cameroon); M'fan (Cameroon); Ziba (Mozambique)
Dialium yambataense Vermoesen; Dialium polyanthum Harms; Dialium macranthum A. Chev.
The tree reaches a height of 13 to 30 m. The bole is straight and 6 to 12 m long, with small buttresses and occasional minor fluting and claw roots expending from base. The trunk diameter reaches from 70 to 100 cm.
Dialium pachyphyllum occurs in marshy sites and dense rain forests.
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 150 to 200 micras (medium). Brown-colored deposits in heartwood vessels. Vestured pits. Vessels per mm2 6 to 10 (medium). Simple perforation plates. V Axial parenchyma in marginal or in seemingly marginal bands. Axial parenchyma in continuous tangential lines or fine bands. Axial parenchyma storied. Siliceous bodies in the axial parenchyma cells. 3 to 4 cells per parenchyma strand. Axial parenchyma bands mor 4 to 10 rays per mm (medium). Rays storied. Rays 1 to 4 seriate. 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). Non-septate fibers. Fibers with simple to minutely bordered pits.
Unrestricted
The sapwood is pale yellow-white or light brown, it has a thickness of 3 to 5 cm. The heartwood is varying shades of brown, it is clearly demarcated.
3
Straight or slightly interlocked; grain has no particular influence on drying, machining and finishing qualities.
The wood is typically medium in texture.
Luster is reported to be low.
Very durable to decay; without preservative treatment. This species is especially suited for all the uses with risks of permanent or long-lasting humidification. Resistant to termites attack. Heartwood is resistant to Lyctus attacks.
1
For this species no growth stresses are reported.
Nearly impossible to treat with a too much low penetration of the preservative substances.
0.89
1.03
9.7
5.3
Ease of Drying: Shrinkage during air drying is moderate.
FR-12
1.8
1910
267839
1126
184
100
1340
1320
Sawing of this species requires powerful equipment.
Suitable for slicing.
Suitable for slicing.
Severe blunting effect; stellited blades for sawing and carbide tools for machining are recommended.
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.
Rather difficult; special tools are needed.
Moderately easy; tools must be cautiously sharpened.
30
Moderately easy; tools must be cautiously sharpened.
Moderately easy; tools must be cautiously sharpened.
Pre-boring is necessary.
Difficult to glue because of high density.
Easy to perform; it gives good results.
Can be polished without surface preparation.
Working with hand tools is difficult.
EXTERIOR GENERAL, bridges, poles, paling, stakes posts, rails, crossarms, crossties, piers, HOUSING GENERAL, beams, flooring, parquet, frames, steps, PLYWOOD AND VENEER, Decorative veneer, TURNING, ornaments, PACKING, heavy packing, CONTAINERS, cooperage, truck bodies, truck flooring
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