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HERNANDIA (Hernandia ovigera)
Trade Name
Hernandia
Scientific Name
Hernandia ovigera L.
Family
HERNANDIACEAE
Common Names
Taba-taba; Pantog-lobo; Malatapai; Malatangan-tangan; Kung-kung; Koron-koron; Kolong-kolong; Kolon-kogon; Kementing laut; Indang; Hemandia; Banago
Scientific Name Synonyms
Hernandia sonora L.; Hernandia papuana C.T White; Hernandia labyrinthica Tuyama; Hernandia javanica Yuyama
Description Of The Tree
Botanical Description
It is a small to medium-sized tree up to 30 m tall. The bole is up to 100 cm in diameter, sometimes with small buttresses.
Natural Habitat
Hernandia ovigera is reported in primary or sometimes in old secondary usually well drained forests, from the sea level up to 1,000 m of altitude.
Non Timber Uses
The fruits are edible and the seeds contain oils locally used for illumination in Java.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Occasionally vessels in radial multiples of 4 or more common. Occasionally vessels of two distinct diameter classes, wood not ring-porous. Occasionally vessel clusters common. Occasionally tangential diameter of vessel lumina 100 micras o Axial parenchyma in marginal or in seemingly marginal bands. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Occasionally axial parenchyma confluent. Axial parenchyma storied. Occasionally prismatic crystals in non-chambered 4 to 10 rays per mm (medium). Rays storied. Larger rays more than 4 seriate. Sheath cells. Prismatic crystals in radial alignment in procumbent ray cells (chambered cells). Occasionally body ray cells procumbent with mostly 2 to 4 rows of upright and/or square Fibers very thin walled. Fibers with simple to minutely bordered pits. Fibers storied.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood and sapwood are not clearly differentiated, light yellowish-gray to grayish-white.
Grain
The grain is frequently interlocked.
Texture
A coarse texture is reported in this species.
Natural Durability
It is considered as non durable without a preservative treatment.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Resistance To Impregnation
It is easy to preserve using pressure treatments.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.28
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.29
Total shrinkage Tangential (Saturated to 0%MC) (%)
7.9
Total shrinkage Radial (Saturated to 0%MC) (%)
3.5
Drying Defects
Ease of Drying: Seasoning is reported to be very good.
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.3
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
367
Stiffness (MOE) 12%MC (kgf/cm²)
70311
Compression parallel to fiber 12%MC (kgf/cm²)
183
Shear strength radial 12%MC (kgf/cm²)
47
Workability
Machining
Machining of this species is reported to be easy.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, FURNITURE AND CABINETS, OTHER AND MUSICAL INSTRUMENTS
General Housing
- 10 - Silica in Timbers
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Other & Musical Instruments
- 63 - Madeiras do Brazil II
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