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COPAL CARAñA (Dacryodes kukachkana)
Trade Name
Copal caraña
Scientific Name
Dacryodes kukachkana L.O. Williams
Family
BURSERACEAE
Common Names
Copal Caraña (Peru)
Scientific Name Synonyms
Dacryodes belemensis Cuatrec.
Description Of The Tree
Botanical Description
The trees are reported to reach heights of 25 m, with trunk diameters ranging from 50 to 60 cm. The bole is straight and cylindrical, up to 10 or 15 m long. It has low buttresses.
Natural Habitat
Dacryodes kukachkana is a co-dominant tree from the Amazonian tropical rain forests, usually found on non inundable soils.
Natural Distribution
This species occurs in Peru and Brazil. In Peru it is reported to be more abundant especially in dry lands, especially in the departments of Loreto, Huanuco and Ucayali.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels solitary and in short radial multiples. Tangential diameter of vessel lumina 150 to 200 micras (medium). Tyloses common. Vessels per mm2 10 to 20 (abundant). Simple perforation plates. Vessel-ray pits coarse in marginal rows. Vessel- Axial parenchyma absent or extremely rare, non visible with magnifying glass (8x). Occasionally siliceous bodies in the axial parenchyma. 4 to 10 rays per mm (medium). Rays commonly 2 seriate. Silica bodies in the ray cells. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Septate fibers present. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Odor
Odor and taste are indistinct.
Color
The sapwood is light gray, the heartwood is pink when dry.
Grain
It has interlocked grain.
Texture
Fine texture is reported in this species.
Luster
This species is moderate in luster.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.58
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.64
Total shrinkage Tangential (Saturated to 0%MC) (%)
5.3
Total shrinkage Radial (Saturated to 0%MC) (%)
4.5
Drying Defects
Ease of Drying: Air drying is reported to be very slow. Drying Defects: Moderate checking and warping are reported.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.2
Wood Chemical Properties
Wood Mechanical Properties
Workability
Sawing
Cutting resistance is generally low.
Blunting Effect
It is reported to have a moderate to severe blunting effect due to high silica content.
Planing
Planing operations are rather easy.
Boring
Boring operations are reported to be fair.
Mortising
Mortising operations are rather easy.
Sanding
Sanding of this wood is easy.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, FURNITURE AND CABINETS
General Housing
- 10 - Silica in Timbers
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
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