DRYPETES (Drypetes sibuyanensis)
Trade Name
Drypetes
Scientific Name
Drypetes sibuyanensis (Elmer) Pax & K. Hoffm.
Family
EUPHORBIACEAE
Common Names
Bagbog (Philippines); Ki endog (Indonesia); Angrit (Indonesia)
Scientific Name Synonyms
Drypetes minahassae (Boerl. & Koord.) Pax & K. Hof; Cyclostemon sibuyanensis Elmer; Cyclostemon minahassae Boerl. & Koord.
Description Of The Tree
Botanical Description
It is an evergreen, dioecious, small to medium-sized tree, up to 30 m tall. The bole is straight to somewhat sinuous in smaller trees, branchless for up to 60 cm in diameter, sometimes fluted or with short buttresses.
Natural Habitat
Drypetes sibuyanensis is usually found in swamp forests or kerangas.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Occasionally vessel clusters common. Tangential diameter of vessel lumina 100 micras or less (very small). Vessels per mm2 5 to 20. Simple perforation plates. Multiple perforation plates. Vessel-ray pits similar to intervessel pits in size Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Occasionally prismatic crystals in non-chambered axial parenchyma cells. Siliceous bodies in the axial parenchyma cells. 3 to 4 cells per parenchyma strand. 5 to 8 cells per parenchyma strand. Rays more than 10 per mm (abundant). Ray height more than 1 mm. Silica bodies in the ray cells. Prismatic crystals in the ray cells. Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Fibers very thick walled. Fibers with simple to minutely bordered pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is pale yellow-brown occasionally mottled with dark or gray, not sharply demarcated from the paler sapwood.
Grain
The grain is usually straight.
Texture
The texture varies from very fine to moderately fine and even.
Natural Durability
It is durable under cover but perishable when in contact with the ground.
Natural durability index (1= Very high durability, 7=Vey low durability)
6
Resistance To Impregnation
Impregnation of preservatives using pressure treatments is very good.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.73
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.83
Total shrinkage Tangential (Saturated to 0%MC) (%)
13.7
Total shrinkage Radial (Saturated to 0%MC) (%)
6.7
Drying Defects
Ease of Drying: Mango is reported to dry well and fairly rapidly with slight seasoning defects. Boards 12 mm thick take 2 to 3 months to air dry. Drying Defects: It is sometimes subject to cupping or bowing, and it may be liable to staining. Kiln Schedules: The wood kiln dries easily by fairly fast schedules.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.0
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
964
Stiffness (MOE) 12%MC (kgf/cm²)
97941
Compression parallel to fiber 12%MC (kgf/cm²)
586
Compression perpendicular to fiber 12%MC (kgf/cm²)
153
Shear strength radial 12%MC (kgf/cm²)
107
Janka hardness (side) 12%MC (kgf)
549
Janka hardness (end grain) 12%MC (kgf)
599
Workability
Machining
Though a dense wood, it is comparatively easy to work.
REFERENCED USES
End Uses Summary
EXTERIOR GENERAL, bridges, poles, stakes posts, crossties, HOUSING GENERAL, beams, joists, flooring, FURNITURE AND CABINETS, cabinets, TOOLS, tool handles
Exterior General
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Bridges
- 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
Poles
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Stake Posts
- 5 - Propriedades fisicas e mecanicas da madeira e do contraplacado de Pinus elliottii
Crossties
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
General Housing
- 10 - Silica in Timbers
Beams
- 11 - Prospect: The wood database
Joists
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Flooring
- 14 - Handbook of Hardwoods
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Cabinet
- 24 - Empire Timbers
Tools
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Tool Handles
- 43 - Maderas de Bolivia (Características y Usos de 55 Maderas Tropicales)
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