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OSSOKO (Scytopetalum klaineanum)

Trade Name

Ossoko

Scientific Name

Scytopetalum klaineanum Pierre

Family

SCYTOPETALACEAE

Common Names

Tokomion (Côte d`Ivoire); Soumien (Côte d`Ivoire); Moussangoue (Côte d`Ivoire); Mossahoue (Côte d`Ivoire); Fessouba (Côte d`Ivoire); Adjansi (Côte d`Ivoire); Ossoko

Description Of The Tree

Botanical Description

The bole is straight and cylindrical, may be up to 26 m in length. The trunk diameter attains 120 cm. It has medium sized buttresses, up to 2 m tall.

Natural Habitat

Natural Distribution

West Africa, in Cameroon, Gabon and in the Republic of the Congo.

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Wood Identification

Anatomic Description Of Wood

Tyloses common. Vessels per mm2 less than 6 (rare). Multiple perforation plates. Vessel-ray pits larger than the intervessel pits. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. Heterogeneous rays and/or multiseriate heterogeneous rays.

  • Wood Macro Photo Tangential Plane
  • Wood Micro Photo Of Transversal Section

Availability

Cites Status

Unrestricted

General Wood Description

Color

The heartwood is yellowish white, it is not demarcated.

COLOR INDEX (1=Black, 7=Light yellow,white)

4

Grain

Straight or slightly interlocked, sometimes with an influence on further processing operations.

Texture

Fine texture is reported in this species.

Luster

Luster is reported to be high.

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. The 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.

Silica Content

Silica Content: This timber is reported to have a negligible silica content. Silica contents over 0.05% may affect wood processing. Silica Value: 0.01

Resistance To Impregnation

Nearly impossible to treat with a too much low penetration of the preservative substances.

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.71

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

0.80

Total shrinkage Tangential (Saturated to 0%MC) (%)

9.9

Total shrinkage Radial (Saturated to 0%MC) (%)

4.7

Drying Defects

Ease of Drying: Drying is rather slow and sometimes difficult to perform. 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.

Recommended Dry Kiln Schedule

FR-7

Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)

2.1

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

1310

Stiffness (MOE) 12%MC (kgf/cm²)

199886

Compression parallel to fiber 12%MC (kgf/cm²)

595

Compression perpendicular to fiber 12%MC (kgf/cm²)

78

Shear strength radial 12%MC (kgf/cm²)

106

Janka hardness (side) 12%MC (kgf)

807

Janka hardness (end grain) 12%MC (kgf)

882

Workability

Sawing

Sawing of this species requires powerful equipment.

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

It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.

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

Pre-boring is necessary.

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

Working with hand tools is difficult.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, joists, boards, frames, panelling, fittings, shutter boards, FURNITURE AND CABINETS, common furniture, TURNING, ornaments, turned furniture, PACKING, light packing, pallets, OTHER AND MUSICAL INSTRUMENTS, handicrafts, door core, coffin, moldings

General Housing
  • 10 - Silica in Timbers
Joists
  • 12 - Tropical timbers of the world. Part I-Tropical American Species
Boards
  • 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Frames
  • 16 - Woods of the World
Paneling
  • 18 - W3TROPICOS Missouri Botanical Garden
Fittings
  • 19 - Silica in Timbers
Shutter Boards
  • 20 - Prospect: The wood database
Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Furniture, Common
  • 23 - Handbook of Hardwoods
Turning
  • 30 - Embassy of Honduras in Japan
Ornaments
  • 31 - Embassy of Colombia in Japan
Turned Articles
  • 32 - Embassy of Cote d`Ivoire in Japan
Packing
  • 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Light Packing
  • 46 - ECUADOR, Inventario y Aprovechamiento de los Bosques del Sur Ecuatoriano
Pallets
  • 48 - The strength properties of timbers
Handcraft
  • 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Door Cores
  • 76 - Descripción General y Anatómica de 105 Maderas del Grupo Andino.
Coffin
  • 78 - Amazonian Timbers for the International Market
Molding
  • 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão

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