NEGRILLO (Persea caerulea)
Trade Name
Negrillo
Scientific Name
Persea caerulea (Ruiz & Pav.) Mez
Family
LAURACEAE
Common Names
Aguacatillo (Venezuela); Aguacate De Monte (Ecuador); Amarillo (Colombia); Negrillo (Bolivia)
Scientific Name Synonyms
Persea laevigata var. caerulea Meisn.; Persea laevigata Kunth; Laurus caerulea Ruiz & Pav.
Description Of The Tree
Botanical Description
Tree size is reported to attain a height of about 20 m, with a trunk diameter that can reach up to 70 cm. Usually the tree develops an irregular stem up to 15 m in length.
Natural Habitat
Persea caerulea is reported in the tropical and subtropical rain forests of South America. It prefers deep soils.
Natural Distribution
Colombia, Venezuela, Ecuador and Bolivia.
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 less than 6 (rare). Simple perforation plates. Vessel-ray pits coarse throughout the ray cell. V Paratracheal axial parenchyma scanty and/or vasicentric. 5 to 8 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays 1 to 4 seriate. Oil and/or mucilage cells at marginal cells of ray parenchyma. Oil and/or mucilage cells associated with the axial and/or ray parenchyma (idioblasts). Body ray cells procumbent with one row of upright and/or 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 pale yellow, the heartwood gradually changes into a pale greenish brown.
Grain
The grain is usually interlocked.
Texture
Medium texture is reported in this species.
Luster
This wood is commonly of high luster.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.47
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.51
Total shrinkage Tangential (Saturated to 0%MC) (%)
6.7
Total shrinkage Radial (Saturated to 0%MC) (%)
3.9
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.7
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
755
Compression parallel to fiber 12%MC (kgf/cm²)
473
Janka hardness (side) 12%MC (kgf)
475
Workability
Sawing
Cutting resistance is generally low.
Turning
30
Finishing
It is easy to finish.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, beams, joists, boards, fittings, FURNITURE AND CABINETS, cabinets, TURNING, TOOLS, PACKING
General Housing
- 10 - Silica in Timbers
Beams
- 11 - Prospect: The wood database
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
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
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
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