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MUIRAPIRANGA (Brosimum rubescens)

Trade Name

Muirapiranga

Scientific Name

Brosimum rubescens Taub.

Family

MORACEAE

Common Names

Bloodwood; Palo De Oro; Legno Satino; Ferolia; Satinholz; Doekaliballi; Satijnhout; Siton Paya; Satine Rubane; Satine Rouge; Muirapiranga (Brazil); Satinwood; Conduru; Falso Pau Brasil (Brazil); Pau Rainha (Brazil); Amapá Rana (Brazil); Satine; Satiné

Scientific Name Synonyms

Piratinera rubescens (Taub.) Pittier; Alicastrum rubescens (Taub.) Taub.

Description Of The Tree

Botanical Description

This tree is reported to have commercial lengths up to 17 m, with diameters from 45 to 60 cm. The boles are straight and cylindrical. It has abundant creamy latex.

Natural Distribution

The species is reported to be regionally common within its range, which includes the Guyanas and the lower Amazon basin. In Brazil it occurs in the Para, Amazonas, Mato Grosso and Rondonia states.

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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). Tyloses common. Vessels per mm2 less than 6 (rare). Simple perforation plates. Vessel-ray pits similar to intervessel pits in s Axial parenchyma aliform. Axial parenchyma confluent. Occasionally prismatic crystals in non-chambered axial parenchyma cells. Axial parenchyma bands under 4 per mm. 4 to 10 rays per mm (medium). Rays 1 to 4 seriate. Occasionally prismatic crystals in the ray cells. Occasionally heterogeneous rays and/or multiseriate heterogeneous rays. Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kr 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 or taste are typically indistinct.

Color

The sapwood is not clearly demarcated from the heartwood. The heartwood is usually deep red or pale reddish-brown in color.

COLOR INDEX (1=Black, 7=Light yellow,white)

3

Grain

The grain is straight to slightly interlocked.

Texture

The wood is medium to fine textured.

Luster

It is not a lustrous wood.

Natural Durability

It is resistant to attack by decay-causing organisms, termites, and dry wood insects.

Natural durability index (1= Very high durability, 7=Vey low durability)

1

Resistance To Impregnation

The heartwood is considered to be moderately difficult to preserve. The sapwood is easier to preserve.

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.95

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

1.11

Total shrinkage Tangential (Saturated to 0%MC) (%)

6.8

Total shrinkage Radial (Saturated to 0%MC) (%)

4.7

Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)

1.4

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

1497

Stiffness (MOE) 12%MC (kgf/cm²)

193214

Compression parallel to fiber 12%MC (kgf/cm²)

939

Compression perpendicular to fiber 12%MC (kgf/cm²)

125

Shear strength radial 12%MC (kgf/cm²)

137

Janka hardness (side) 12%MC (kgf)

918

Janka hardness (end grain) 12%MC (kgf)

1070

Workability

Sawing

The wood is reported to be moderately difficult to saw.

Rotary Veneer Cutting

It is reported to be interesting for slicing, but thermal treatments are recommended.

Sliced Veneer

It is reported to be interesting for slicing, but thermal treatments are recommended.

Blunting Effect

Blunting effect on cutting tools is rated as moderate.

Planing

Planing operations are reported to be rather difficult.

Turning

30

Nailing

Pre-boring is required before nailing or screwing.

Gluing

Gluing properties are reported to be good.

Finishing

It is easy to finish.

Polishing

The wood has good polishing characteristics.

Response To Hand Tools

B. rubescens is moderately difficult to work with hand tools.

REFERENCED USES

End Uses Summary

FURNITURE AND CABINETS, TURNING, OTHER AND MUSICAL INSTRUMENTS

Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Turning
  • 30 - Embassy of Honduras in Japan
Other & Musical Instruments
  • 63 - Madeiras do Brazil II

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