OWUI (Hexalobus crispiflorus)
Trade Name
Owui
Scientific Name
Hexalobus crispiflorus A.Rich.
Family
ANNONACEAE
Common Names
Lapawe (Nigeria); Siéléké (Côte d`Ivoire); Owui (Gabon); Mossome (Central African Republic); Owe (Cameroon); Leoué (Cameroon); Chungé (Cameroon)
Scientific Name Synonyms
Hexalobus salicifolius Engl.; Hexalobus mbula Exell; Hexalobus lujae De Wild.; Hexalobus grandiflorus Benth.
Description Of The Tree
Botanical Description
The tree reaches a height of 20 to 30 m. The bole is fluted, often buttressed to a height of 1.7 m. The bole may occasionally be up to 20 m in length. The trunk diameter attains 70 up to 150 cm.
Natural Habitat
Hexalobus crispiflorus occurs in deciduous and fringing forests, along river-flats and in the savanna zones of the Guineas.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 micras or less (very small). Non-vestured pits. Vessels per mm2 10 to 20 (abundant). Simple perforation plates. Vessel-ray pits similar to interv Axial parenchyma scalariform. Non-crystals in axial parenchyma cells. 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). 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 brown, pink or pale yellow, it is not clearly demarcated. Stripy figure on the quarter-cut and back sawn faces.
Grain
Straight; grain has no particular influence on drying, machining and finishing qualities.
Texture
Fine texture is reported in this species.
Luster
This species is high in luster.
Natural durability index (1= Very high durability, 7=Vey low durability)
4
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.50
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.55
Drying Defects
Ease of Drying: Drying is very slow and difficult to perform; defects are frequent. Drying Defects: Risks of distortions. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
781
Stiffness (MOE) 12%MC (kgf/cm²)
131445
Compression parallel to fiber 12%MC (kgf/cm²)
511
Compression perpendicular to fiber 12%MC (kgf/cm²)
64
Janka hardness (side) 12%MC (kgf)
365
Janka hardness (end grain) 12%MC (kgf)
469
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
Moderately easy; tools must be cautiously sharpened.
Turning
30
Boring
Moderately easy; tools must be cautiously sharpened.
Mortising
Moderately easy; tools must be cautiously sharpened.
Nailing
No particular problem.
Gluing
Glues well if basic gluing technical rules are followed.
Sanding
Easy to perform; it gives good results.
Polishing
Can be polished without surface preparation.
Response To Hand Tools
No particular problems.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, flooring, parquet, fittings, FURNITURE AND CABINETS, cabinets, TURNING, SPORTS, TOOLS, tool handles, agricultural tools, PACKING, CONTAINERS, cooperage, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats, OTHER AND MUSICAL INSTRUMENTS, handicrafts, particleboard, paper
General Housing
- 10 - Silica in Timbers
Flooring
- 14 - Handbook of Hardwoods
Parquet
- 15 - Empire Timbers
Fittings
- 19 - Silica in Timbers
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Cabinet
- 24 - Empire Timbers
Turning
- 30 - Embassy of Honduras in Japan
Sports
- 38 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Agricultural Tools
- 44 - Atlas of Peruvian Woods
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Containers
- 50 - Properties of imported tropical woods
Cooperage
- 51 - Recopilacion de propiedades mecanicas de maderas creciendo en Chile
Truck Body
- 53 - Timbers of the New World
Truck Flooring
- 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Boats
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
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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