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THANDE (Stereospermum colais)
Trade Name
Thande
Scientific Name
Stereospermum colais (Buch.-Ham. Ex Dillw.) Mabb
Family
BIGNONIACEAE
Common Names
Tafu mowst (Vietnam); Mosng bof (Vietnam); Dinh (Vietnam); Khae khao (Thailand); Khae han (Thailand); Khae hin (Thailand); Khe say (Laos); Thande (Myanmar); Yelloe snake tree
Scientific Name Synonyms
Stereospermum tetragonum A.DC; Stereospermum personatum (Hassk.) Chatterjee; Stereospermum chelonoides auct. non. (L.f.) DC.; Dipterosperma personatum Hassk.
Description Of The Tree
Botanical Description
It is a medium sized tree, up to 30 m tall. The bole is up to 100 cm in diameter, without buttresses, but sometimes slightly fluted.
Natural Habitat
It is found in primary or secondary lowland or hill forests, from the sea level up to 1,000 m of altitude.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels per mm2 5 to 20. Occasionally vessels per mm2 less than 6. Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel pits medium, 7 to 10 micras. Intervessel pits small, 7 micras or less. Occasionally axial parenchyma in marginal or in seemingly marginal bands. Occasionally paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Axial parenchyma confluent. Two cells per parenchyma strand. 3 to 4 cells per parenchyma s 4 to 10 rays per mm (medium). 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
Color
The heartwood is pale yellow-brown with a grey tinge, not clearly differentiated from the paler sapwood.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
The grain is interlocked.
Texture
The texture is rather coarse due to the abundance of confluent parenchyma.
Natural Durability
The wood is non-durable to moderate durable.
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)
0.72
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.82
Total shrinkage Tangential (Saturated to 0%MC) (%)
10.5
Total shrinkage Radial (Saturated to 0%MC) (%)
6.2
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
1.7
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1008
Stiffness (MOE) 12%MC (kgf/cm²)
112000
Compression parallel to fiber 12%MC (kgf/cm²)
559
Workability
Blunting Effect
It is reported to blunt rapidly the cutting elements.
Machining
The wood is rather difficult to work, rapidly blunting tools.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, beams, boards, flooring, frames, FURNITURE AND CABINETS, TOOLS, agricultural tools, NAVAL CONSTRUCTION, boats
General Housing
- 10 - Silica in Timbers
Beams
- 11 - Prospect: The wood database
Boards
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Flooring
- 14 - Handbook of Hardwoods
Frames
- 16 - Woods of the World
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Agricultural Tools
- 44 - Atlas of Peruvian Woods
Shipbuilding
- 55 - Tropical Timber Atlas of Latin America
Boats
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
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