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POTOPOTO (Strephonema pseudocola)

Trade Name

Potopoto

Scientific Name

Strephonema pseudocola A.Chev.

Family

COMBRETACEAE

Common Names

Poto-poto (Côte d`Ivoire); mbomu (Cameroon); kangmbom (Cameroon); Eyengwe (Cameroon)

Scientific Name Synonyms

Strephonema apolloniense J.J. Clark

Description Of The Tree

Botanical Description

The tree reaches a height of 35 m. The bole is cylindrical and straight. The trunk diameter attains 100 cm.

Natural Habitat

Strephonema pseudocola grows on riversides and in wet type forests. Occasionally reported as an under-storey tree in high forest.

Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Vessels exclusively solitary (over 90%). Vessels of two distinct diameter classes, wood not ring-porous. Tangential diameter of vessel lumina 100 to 150 micras (small). Tangential diameter of vessel lumina 200 micras or more (large). Tylos Axial parenchyma aliform. Axial parenchyma confluent. Axial parenchyma in thick bands. Occasionally prismatic crystals in non-chambered axial parenchyma cells. Prismatic crystals in short chains in chambered axial parenchyma cells. Over 9 cells per parenchyma Rays more than 10 per mm (abundant). Rays non-storied. Rays 1 to 4 seriate. Heterogeneous rays and/or multiseriate heterogeneous rays. Non-septate fibers. Fibers with simple to minutely bordered pits.

Availability

Cites Status

Unrestricted

General Wood Description

Color

The sapwood is slightly paler than the heartwood. The heartwood is yellow-brown or pale olive, it is not clearly demarcated.

Grain

Straight; grain has no particular influence on drying, machining and finishing qualities.

Texture

This wood has a somewhat fine texture.

Natural Durability

Moderately durable to decay. Without preservative treatment, this species can be used only under risk of occasional re-humidification. It is not suited for uses with risks of permanent or long-lasting humidification. Sensible to termites attack. The heart

Natural durability index (1= Very high durability, 7=Vey low durability)

3

Silica Content

Silica Content: Negligible content of silica is reported. Amounts over 0.05% may affect wood processing. Silica Value: 0

Resistance To Impregnation

Difficult to treat with only a low penetration of the preservative products.

Wood Physical Properties

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

0.63

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

0.71

Drying Defects

Ease of Drying: Drying is rather slow and sometimes difficult to perform. Drying Defects: Risks of checks. Kiln Schedules: The kiln schedule has been tested.

Wood Chemical Properties

Wood Mechanical Properties

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

1005

Stiffness (MOE) 12%MC (kgf/cm²)

190955

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

548

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

70

Janka hardness (side) 12%MC (kgf)

617

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

712

Workability

Sawing

It is moderately 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

Moderately easy; tools must be cautiously sharpened.

Moulding

Moderately easy; tools must be cautiously sharpened.

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

No particular problems.

REFERENCED USES

End Uses Summary

EXTERIOR GENERAL, HOUSING GENERAL, parquet, fittings, FURNITURE AND CABINETS, cabinets, SPORTS, TOOLS, tool handles, agricultural tools, NAVAL CONSTRUCTION, boats, OTHER AND MUSICAL INSTRUMENTS, handicrafts

Exterior General
  • 1 - Tabela de resultados de ensaios fisicos e mecanicos
General Housing
  • 10 - Silica in Timbers
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
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
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.)

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