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ARAPARI (Macrolobium acaciifolium)
Trade Name
Arapari
Scientific Name
Macrolobium acaciifolium (Benth.) Benth.
Family
LEGUMINOSAE
Common Names
Espinito (Venezuela); Arepito (Venezuela); Huarango (Ecuador); Cutanga (Ecuador); Arapari (Bolivia); Pashaco (Peru); Aguano Pashaco (Peru); Arapari-Da-Várzea (Brazil); Arapari-Branco (Brazil); Arapari (Brazil); Angelim-Vermelho (Brazil)
Scientific Name Synonyms
Vuapa acaciifolia (Benth.) Kuntze; Vouapa acaciifolia (Benth.) Baill.; Outea acaciifolia Benth.
Description Of The Tree
Botanical Description
The trees are reported to reach heights of 30 m up to 40 m, with trunk diameters of 100 cm. They develop straight and cylindrical boles without buttresses, free of branches until half of the total tree length.
Natural Habitat
Macrolobium acaciifolium is reported along river banks and lakes, growing on temporary inundable areas.
Natural Distribution
This species is reported to be distributed from Guyana, Surinam and Venezuela through the Acre river in Brazil and the Amazon, Nanay and Itaya rivers in Peru.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels solitary and in short radial multiples. Tangential diameter of vessel lumina 200 micras or more (large). Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. I Axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Occasionally prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per parenchyma strand. Rays more than 10 per mm (abundant). Rays exclusively uniseriate. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Prismatic crystals in the ray cells. Heterogeneous rays and/or multiseriate heterogeneous rays. Body ray cells p Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Odor
Odor and taste are reported to be indistinct.
Color
The sapwood is gray, the heartwood is reddish brown in color.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
This species is reported to have straight grain.
Texture
The texture of the wood is medium.
Luster
The wood surface is described as moderate in luster.
Natural durability index (1= Very high durability, 7=Vey low durability)
6
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.49
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.53
Drying Defects
Ease of Drying: Drying is slow but without difficulties. Drying Defects: No particular risks of drying defects, subject to normal drying conditions. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
897
Stiffness (MOE) 12%MC (kgf/cm²)
112803
Compression parallel to fiber 12%MC (kgf/cm²)
469
Janka hardness (side) 12%MC (kgf)
477
Workability
Machining
Machining of this species is fair.
Finishing
Finishing of this wood is easy.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, fittings, PACKING
General Housing
- 10 - Silica in Timbers
Fittings
- 19 - Silica in Timbers
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
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