Adu (Garcinia kola)
Family: Guttiferae
Common names: Adu, Bita-kola, Bitter cola, Ebongagnagne, Edun, Efiat, Efrie, Etirai, Goro, Kofe, Ntu, Ojie, Okain, Okan, Onie, Orogbo, Sagbe, Sagbei, Sagbi, Sefufudua, Suapea, Swa-meh, Ta-sagbe, Tiampa, Twapea, Tweapea, Twiapia, Ugolu
Distributed in: Angola, Benin, Cameroon, Congo, Gabon, Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone, Togo, Zaire (Africa)
Common uses: Agricultural implements, Boat building (general), Boxes and crates, Flooring, Furniture, Joinery, Light construction, Railroad ties, Tool handles, Turnery, Vehicle parts
Environment profile: Rare
Tree size: Tree height is 20-30 m
Colors: the heart isRed, Yellow to golden-yellow to orangeand the sapwoodWhite to yellow, Yellow.The grain isStraight, the textureMediumand the lusterSlightly lustrous
Natural durability: Susceptible to marine borer attack, Very durable
LightInduced Color Change: Darker
Drying Defects: Distortion, Moderate end spitting
Ease of Drying: Fairly Easy
Tree Identification: Bole/stem form is straight
Boring: Fairly difficult to very difficult
Carving: Fairly Difficult to Very Difficult
Gluing: Easy to glue
Mortising: Fairly Difficult to Very Difficult
Moulding: Fairly Difficult to Very Difficult
Movement in Service: Fairly Difficult to Very Difficult
Nailing: Fairly Difficult to Very Difficult, Poor to Very Poor
Planing: Fairly Difficult to Very Difficult
Response to hand tools: Fairly Difficult to Difficult to Work
Routing recessing: Fairly Difficult to Very Difficult
Screwing: Fairly Difficult to Very Difficult, Poor to Very Poor Results; Turning: Fairly Difficult to Very Difficult
Polishing: Good; Staining: Fairly Easy to Very Easy;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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Item |
Green |
Dry |
Metric |
Specific Gravity |
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Density |
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817 |
kg/m3 |
Bending Strength |
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kg/cm2 |
Crushing Strength |
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kg/cm2 |
Hardness |
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kg |
Impact Strength |
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cm |
Shearing Strength |
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kg/cm2 |
Stiffness |
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1000 kg/cm2 |
Tangential Shrinkage |
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% |
Radial Shrinkage |
5 |
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% |
Weight |
801 |
641 |
kg/m3 |
Maximum Load |
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cm-kg/cm3 |
Toughness |
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cm-kg |
Static Bending |
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kg/cm2 |
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| | | | Item | Green | Dry | English | Density | | 51 | lbs/ft3 | Weight | 50 | 40 | lbs/ft3 | Radial Shrinkage | 5 | | % | Tangential Shrinkage | 9 | | % | |
Shrinkage, Tangential = large Shrinkage, Tangential = fairly large Shrinkage, Radial = large Shrinkage, Radial = fairly large Shrinkage, Tangential = moderate Shrinkage, Radial = moderate Density (dry weight) = 61-67 lbs/cu. ft Density (dry weight) = 38-45 lbs/cu. ft.
Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchCooper, G.P., Record, S.J.,1931,The Evergreen Forests of Liberia,Yale School Forestry Bulletin,31,pp1-153Hedin, L.,1930,Etude sur la Foret et les Bois du Cameroun,Haut-Commissaire de la CamerounIrvine, F.R.,1961,Woody Plants of Ghana,O.U.P. LondonKeay, R.W.J., et al,1960,Nigerian Trees Vol.1,Nigeria Federal Department of Forest Research, IbadanKennedy, J.D.,1936,Forest Flora of Southern Nigeria,Government Printer LagosKryn, J.M., Forbes, E.W.,1959,The Woods of Liberia,U.S.A. Department of Agriculture,Forest Products Laboratory, Madison,,Report No. 2159Pieters, A.,1977,Essences Forestieres du Zaire,R.U.G. Gent BelguimSavill, P.S., Fox, J.E.D.,1967,Trees of Sierra LeoneTaylor, C.J.,1960,Synecology and Silviculture in Ghana,University College of Ghana Thomas Nelson and Sons
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