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MUIRATINGA (Maquira coriacea)
Trade Name
Muiratinga
Scientific Name
Maquira coriacea (H. Karst.) C.C. Berg
Family
MORACEAE
Common Names
Muiratinga (Brazil)
Scientific Name Synonyms
Pseudolmedia coriacea H. Karst.; Olmedia maxima Ducke; Olmedia laurina Baill.
Description Of The Tree
Botanical Description
Maquira coriacea trees are large, up to 40 m tall.
Natural Habitat
Maquira coriacea is reported in gallery forests in Bolivia, in a range between 200 up to 1,800 m of altitude.
Natural Distribution
This species is found in the Amazon basin.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels solitary and in short radial multiples. Tangential diameter of vessel lumina 100 to 150 micras (small). Occasionally vessels per mm2 more than 20. Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and s Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma lozenge-aliform. Occasionally axial parenchyma confluent. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Occasionally larger rays more than 4 seriate. Occasionally prismatic crystals in the ray cells. Occasionally heterogeneous rays and/or multiseriate heterogeneous rays. Body ray cells procumbent with mostly 2 to 4 rows of upright Occasionally septate fibers present. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is white to yellowish white in color.
COLOR INDEX (1=Black, 7=Light yellow,white)
5
Grain
The grain is mostly frequently interlocked.
Texture
The wood is medium textured.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Internal Growth Stresses
Residual stresses present in the wood may cause defects while processing the timber.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.44
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.47
Total shrinkage Tangential (Saturated to 0%MC) (%)
6.7
Total shrinkage Radial (Saturated to 0%MC) (%)
3.4
Drying Defects
Ease of Drying: Air seasoning is reported to be moderate. Drying Defects: Bowing and crooking are reported. Slight risk of casehardening is also reported. Kiln Schedules: Slow drying is recommended.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.0
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
520
Stiffness (MOE) 12%MC (kgf/cm²)
82539
Compression parallel to fiber 12%MC (kgf/cm²)
387
Workability
Sawing
Sawing operations are reported to be easy, but woolly surface may occur.
Rotary Veneer Cutting
This species is interesting for peeling (at room temperature) and for slicing.
Sliced Veneer
This species is interesting for peeling (at room temperature) and for slicing.
Blunting Effect
This species has a severe blunting effect on the cutting tools due to its high silica content.
Planing
Special hard metal cutting tools are necessary.
Nailing
Poor nail-holding properties.
Gluing
Gluing of this species is easy.
Polishing
This species is reported to be easy to polish.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, panelling, shutter boards, FURNITURE AND CABINETS, PLYWOOD AND VENEER, PACKING, light packing, OTHER AND MUSICAL INSTRUMENTS, handicrafts, moldings
General Housing
- 10 - Silica in Timbers
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Shutter Boards
- 20 - Prospect: The wood database
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Panels, Veneers
- 25 - Directory of Timber Trade Malaysia
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Light Packing
- 46 - ECUADOR, Inventario y Aprovechamiento de los Bosques del Sur Ecuatoriano
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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