| Scientific Name | Hevea braziliensis (H.B.K) M.-A. |
| Trade Name | Rubber |
| Local Name | Rubber |
| Family | Euphorbiaceae |
| Tree Size | Large |
| Tree Height ( m ) | 20 |
| Tree Diameter ( cm ) | 40 - 70 |
| Tree Distribution | Native in South America, raised extensively in plantations |
| Sapwood-Heartwood Distinction | Not distinct |
| Sapwood Colour | Yellowish white or pale white |
| Heartwood Colour | Yellowish white or pale white |
| Hardness | Moderately hard |
| Specific Gravity Based on Weight Over-dry and Volume Green | 0.91 |
| Weight | Light to moderately heavy |
| Weight(Kg)/cubic meter at 12% Moisture Content | 526 |
| Texture | Medium coarse textured |
| Grain | Straight grained |
| Growth Rings | Distinct |
| Porosity | Diffuse porous |
| Vessel Size | Small to medium sized |
| Vessel Arrangement | Solitary and in radial multiples of two to three |
| Vessel Diameter | 110 - 260 185 |
| Vessel Element Lenght | 240 - 750 750 |
| Perforation | Simple |
| Pit Outline | Oval to circular |
| Pit Size | Large(7-14 µm),non-vestured |
| Vessel Ray Pitting | Larger with much reduced border |
| Ray Nature | Moderately broad, numerous and fairly closely spaced |
| Ray Arrangement/Type | 1-4 seriate,heterogeneous type-II,showing a tendancy to homogeneity.body of ray made up of procumbent cells and 2-4 marginal row of square or upright cells.Uniseriate rays made wholly of square or upright cells |
| Ray Number | 7 - 11 |
| Ray Height | 240 - 830 515 |
| Fibre Walls | Thin to thick walled,non-septate with minute, simple pits on radial walls |
| Fiber Length | |
| Modulus of Rupture in kg/cm2 (Green) | 437 |
| Modulus of Elasticity in kg/cm2 (Green) | 55600 |
| Modulus of Rupture kg/cm2 (Dry) | 756 |
| Modulus of Elasticity in kg/cm2 (Dry) | 82000 |
| Uses | Packing cases and boxes, fireboard, particleboard and low quality furniture. |
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