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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.

  • Wood Macro Photo Tangential Plane
  • Wood Micro Photo Of Transversal Section

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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