| Scientific Name | Nauclea diderrichii Merrill. |
| Trade Name | Kusia |
| Local Name | Opepe,Kusiaba(Ghana),Badi(Ivory coast),Bilinga(Cameroon) |
| Family | Rubiaceae |
| Tree Size | Large |
| Tree Height ( m ) | 50 |
| Tree Diameter ( cm ) | 150 |
| Tree Distribution | Tropical Africa |
| Sapwood-Heartwood Distinction | Distinct |
| Sapwood Colour | White or pale yellow |
| Heartwood Colour | Yellow or orange yellow |
| Hardness | Moderately hard |
| Specific Gravity Based on Weight Over-dry and Volume Green | 0.63 |
| Weight | Moderately heavy. |
| Weight(Kg)/cubic meter at 12% Moisture Content | |
| Texture | Medium coarse texture. |
| Grain | Interlocked or irregular grain |
| Growth Rings | Absent |
| Porosity | Diffuse porous |
| Vessel Size | Exclusively solitary,medium-sized, faintly visible to naked eye, but clearly seen under a hand lens |
| Vessel Arrangement | Vessels of two different sizes |
| Vessel Diameter | 145 - 260 180 |
| Vessel Element Lenght | 385 - 790 790 |
| Perforation | Simple |
| Pit Outline | Polygonal |
| Pit Size | Small( 3-4 µm),vestured. |
| Vessel Ray Pitting | Alternate and pit outline polygonal |
| Ray Nature | Fine to moderately broad. |
| Ray Arrangement/Type | One to three cells wide; heterogeneous type-I; uniseriate rays made up of square or upright cells; multiseriate rays with over four or more rows of upright cells |
| Ray Number | 14 - 16 |
| Ray Height | 300 - 900 710 |
| Fibre Walls | Thin to thick walled.Non-septate |
| Fiber Length | |
| Modulus of Rupture in kg/cm2 (Green) | |
| Modulus of Elasticity in kg/cm2 (Green) | |
| Modulus of Rupture kg/cm2 (Dry) | |
| Modulus of Elasticity in kg/cm2 (Dry) | |
| Uses | General construction and for making attractive floorings, piling, wharf and jetty decking and other docks and marine works, piles & posts, joinery & interior fittings. |
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