PAU SANGUE (Pterocarpus vernalis)
Trade Name
Pau sangue
Scientific Name
Pterocarpus vernalis Pittier
Family
LEGUMINOSAE
Common Names
Bollo Blanco (Colombia); Grau (Colombia); Grau Blanco (Colombia); Sangre De Grado (Colombia); Sangregado (Colombia); Sabroso (Colombia); Lagunero Mejoro (Venezuela); Macunana (Venezuela); Sangregado (Venezuela); Tasajo (Venezuela); Sangre Drago (Venezuela); Moutochi (Guyana); Ibará (Argentina); Sangre De Drago (Colombia); Yaya Sangre; Sangrillo; Sangre De Drago (Venezuela); Pau Sangue (Brazil); Palo Sangre Negro; Palo De Pollo; Nogal Falso (Bolivia); Mututi; Mucunana; Lagunero; Huevos De Gato; Drago (Venezuela); Bebe; Angu; Sangre
Scientific Name Synonyms
Pterocarpus rupestris Pittier; Pterocarpus podocarpus S.F. Blake; Pterocarpus minimus R.S. Cowan; Pterocarpus heterophyllus Pittier; Pterocarpus acapulcensis Rose
Description Of The Tree
Botanical Description
The tree attains a height of about 30 to 35 m, with diameters of 90 cm. The boles are straight, with commercial lengths of 10 to 20 m. It presents small or no buttresses.
Natural Habitat
Pterocarpus vernalis grows in a wide variety of habitats in the tropical American forests. It is found in primary and secondary forests.
Natural Distribution
P. vernalis is reported from Southern Mexico to northern Argentina.
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. Axial parenchyma aliform. Axial parenchyma confluent. Axial parenchyma in discontinuous tangential lines. Axial parenchyma storied. Prismatic crystals in chambered axial parenchyma cells and/or in fi Rays more than 10 per mm (abundant). Rays storied. Rays exclusively uniseriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Odor
It has no discernible odor or taste.
Color
The heartwood and sapwood are reported to be indistinct. The wood is yellowish brown in color. Dark brown are reported in the heartwood.
Grain
The grain is straight to interlocked.
Texture
The texture is medium.
Luster
The wood is commonly of medium luster.
Natural Durability
It is generally very susceptible to attack by decay fungi.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Resistance To Impregnation
Pterocarpus is very easy to treat using either open-tank or pressure vacuum systems.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.56
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.62
Total shrinkage Tangential (Saturated to 0%MC) (%)
7.0
Total shrinkage Radial (Saturated to 0%MC) (%)
4.0
Drying Defects
Ease of Drying: Drying is reported to be rapid. Drying Defects: Slight tendency to warping.
Recommended Dry Kiln Schedule
JUNAC-C
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.8
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
942
Stiffness (MOE) 12%MC (kgf/cm²)
128000
Compression parallel to fiber 12%MC (kgf/cm²)
526
Shear strength radial 12%MC (kgf/cm²)
119
Janka hardness (side) 12%MC (kgf)
617
Janka hardness (end grain) 12%MC (kgf)
740
Workability
Sawing
Cutting resistance is reported to be generally low.
Rotary Veneer Cutting
This species is reported to convert readily into veneer for plywood.
Sliced Veneer
This species is reported to convert readily into veneer for plywood.
Machining
Pterocarpus wood is reported to have a good behavior in all machining operations.
Planing
It is easy to plane to yield clean, smooth surfaces.
Sanding
The material is reported to respond very well to sanding.
Steam Bending
Steam-bending properties are reported to be good.
Response To Hand Tools
The wood responds well to hand tools.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, beams, joists, boards, frames, panelling, fittings, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, TOOLS, tool handles, PACKING, OTHER AND MUSICAL INSTRUMENTS, particleboard
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
Frames
- 16 - Woods of the World
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Fittings
- 19 - Silica in Timbers
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Cabinet
- 24 - Empire Timbers
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Particleboard
- 80 - Estudio Integral de la Madera para Construcción
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