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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.

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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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