Timbers of Kerala

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Scientific Name  Syzygium cumini (L.)Skeels
Trade Name  Jamun
Local Name  Njaval, Njara
Family  Myrtaceae
Tree Size  Medium to very large
Tree Height ( m )  15 - 35
Tree Diameter ( cm )  120
Tree Distribution  West coast tropical evergreen forest and West coast semi-evergreen forests.Oftern planted as shade trees
Sapwood-Heartwood Distinction  Not distinct
Sapwood Colour  Pale reddish grey to brownish grey showing some lustre
Heartwood Colour  Sapwood and heartwood not distinct
Hardness  Moderately hard
Specific Gravity Based on Weight Over-dry and Volume Green  0.64
Weight  Moderately heavy
Weight(Kg)/cubic meter at 12% Moisture Content  670
Texture  Medium to coarse textured
Grain  Interlocked grain
Growth Rings  Indistinct
Porosity  Diffuse porous
Vessel Size  Medium to small sized
Vessel Arrangement  Solitary and in radial multiples of two to three,rarely in clusters
Vessel Diameter   120 - 190 160
Vessel Element Lenght  300 - 690 690
Perforation  Simple
Pit Outline  Polygonal
Pit Size  Medium (8-9 Ám),vestured
Vessel Ray Pitting  Large, flattened horizontally or in vertical direction with much reduced border
Ray Nature  Fine, numerous and closely spaced
Ray Arrangement/Type  One to three seriate with heterogeneous typell.Body of uniseriate rays wholly made up of squre cells or upright cells or both.In multiseriate rays the uniseriate tails made up of upright or square cells and multiseriate portion made up of procumbent cel
Ray Number  12 - 17
Ray Height  500 - 1450 960
Fibre Walls  Thin to thick walled,non-septate with minute pits on the radial walls
Fiber Length 
Modulus of Rupture in kg/cm2 (Green)  798
Modulus of Elasticity in kg/cm2 (Green)  109400
Modulus of Rupture kg/cm2 (Dry)  950
Modulus of Elasticity in kg/cm2 (Dry)  126500
Uses  Beams, rafters, posts, general-purpose plywood, agricultural implements, blockboards, poles and fence posts door and window frames, boat and building, fuel wood, beams & rafters, boats & ship building, wells & wheels, oars and mine props
  • Tree Image
  • Timber Gross View
  • TS (100X)
  • TLS(100X)
  • RLS(100X)

College of Forestry - KAU