EBOM (Anonidium mannii)
Trade Name
Ebom
Scientific Name
Anonidium mannii Engl. et Diels
Family
ANNONACEAE
Common Names
Ogedegbo (Nigeria); Ewura-igbo (Nigeria); Ebom (Gabon); bob (Congo); Ombé (Cameroon); Mbé (Cameroon); Ebom (Cameroon)
Scientific Name Synonyms
Uvaria crassipetala Engler ex Engler & Diels; Uvaria crassipetala Engl. ex Engl. & Diels; Annona mannii Oliv.
Description Of The Tree
Botanical Description
The tree reaches a height of 23 to 30 m, with diameters up to 100 cm. The bole is straight, unbuttressed, and may be up to 20 m in length.
Natural Habitat
Anonidium mannii occurs in dense rain forests.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 150 to 200 micras (medium). Non-vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel Axial parenchyma scalariform. Non-crystals in axial parenchyma cells. 3 to 4 cells per parenchyma strand. Axial parenchyma bands over 4 per mm. Rays less than 4 per mm (rare). Larger rays width 0. 1 mm or more and 2 mm or more in height. Rays non-storied. Larger rays more than 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Non-septate fibers. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is whitish, turning a dirty yellow on exposure with time, it is not demarcated.
Grain
The grain is slightly but systematically interlocked.
Texture
This wood has a somewhat coarse texture.
Natural Durability
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. Heartwood is sensible to Lyctus attacks.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Internal Growth Stresses
No growth stresses are reported in this species.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.32
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.34
Drying Defects
Ease of Drying: It is reported to be moderately difficult to dry. Drying Defects: Slight warping and checking. Kiln Schedules: Air seasoning before kiln drying is recommended.
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
434
Compression parallel to fiber 12%MC (kgf/cm²)
270
Compression perpendicular to fiber 12%MC (kgf/cm²)
27
Janka hardness (side) 12%MC (kgf)
139
Janka hardness (end grain) 12%MC (kgf)
217
Workability
Sawing
It is easy to saw.
Rotary Veneer Cutting
Not suitable for veneering.
Sliced Veneer
Not suitable for veneering.
Blunting Effect
Slight blunting effect; ordinary tools can be used for sawing and machining.
Machining
Machining of this species is reportedly easy.
Planing
Easy; no particular problems.
Moulding
Easy; no particular problems.
Boring
Easy; no particular problems.
Mortising
Easy; no particular problems.
Nailing
Easy to perform but low nails holding.
Gluing
Glues well if basic gluing technical rules are followed.
Sanding
Particular care is needed to avoid woolly aspect of the surface.
Polishing
Needs pre-coating.
Response To Hand Tools
No particular problems.
REFERENCED USES
End Uses Summary
PLYWOOD AND VENEER, SPORTS, PACKING, OTHER AND MUSICAL INSTRUMENTS, handicrafts, particleboard, paper
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Sports
- 38 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Particleboard
- 80 - Estudio Integral de la Madera para Construcción
Paper
- 82 - Compilation of Data on the Mechanical Properties of Foreign woods (Part 2) Central and South America.
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