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OSSIMIALE (Newtonia leucocarpa)
Trade Name
Ossimiale
Scientific Name
Newtonia leucocarpa Gilbert et Boutique
Family
LEGUMINOSAE
Common Names
Ossimiale (Gabon); Eseng (Equatorial Guinea)
Scientific Name Synonyms
Piptadenia leucocarpa Harms
Description Of The Tree
Botanical Description
The tree reaches a height of 26 to 43 m. The bole is cylindrical, high, with fairly pronounced buttresses. The bole length may be up to 30 m in length. The trunk diameter attains from 100 to 170 cm over the short buttresses.
Natural Habitat
Newtonia leucocarpa is found in intermediate closed high forest, often in small groups.
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). Vestured pits. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits Paratracheal axial parenchyma scanty and/or vasicentric. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays non-storied. Rays 1 to 2 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Occasionally septate fibers present. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The sapwood is paler than the heartwood. The heartwood is red-brown to silvery pink with darker veins and a reddish tinge, it is clearly demarcated.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Texture
The wood is mostly medium in texture.
Luster
The wood is described as low in luster.
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
Significant growth stresses are reported for this species.
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)
0.64
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.71
Total shrinkage Tangential (Saturated to 0%MC) (%)
7.2
Total shrinkage Radial (Saturated to 0%MC) (%)
3.9
Drying Defects
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: No particular risks of drying defects, subject to normal drying conditions. Kiln Schedules: The kiln schedule has been tested.
Recommended Dry Kiln Schedule
FR-10
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.8
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1128
Stiffness (MOE) 12%MC (kgf/cm²)
150289
Compression parallel to fiber 12%MC (kgf/cm²)
642
Compression perpendicular to fiber 12%MC (kgf/cm²)
87
Shear strength radial 12%MC (kgf/cm²)
96
Janka hardness (side) 12%MC (kgf)
631
Janka hardness (end grain) 12%MC (kgf)
725
Workability
Sawing
It is moderately easy to saw.
Rotary Veneer Cutting
Suitable for slicing, also suitable for peeling if treated.
Sliced Veneer
Suitable for slicing, also suitable for peeling if treated.
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
Easy; no particular problems.
Boring
Easy; no particular problems.
Mortising
Easy; no particular problems.
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
HOUSING GENERAL, boards, flooring, parquet, frames, steps, panelling, fittings, shutter boards, FURNITURE AND CABINETS, common furniture, PLYWOOD AND VENEER, faces, cores, PACKING, heavy packing, pallets
General Housing
- 10 - Silica in Timbers
Boards
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Flooring
- 14 - Handbook of Hardwoods
Parquet
- 15 - Empire Timbers
Frames
- 16 - Woods of the World
Steps
- 17 - Tree Conservation Database
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
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Faces
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
Cores
- 27 - Embassy of Brazil in Japan
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Heavy Packing
- 47 - Arvores Brasileiras
Pallets
- 48 - The strength properties of timbers
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