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Kumbi (Lannea welwitschii)
Family: Anacardiaceae Common names: Abala puli, Abalapuli, Aberewa nyansid, Acajou magona, Asogedaka, Awpaw, Bopire, Borepore, Duko, Durgo, Duroko, Ekika, Ekika aja, Ekikaja, Eknalokpoe, Ekoa, Ekoe, Ewinwan, Kakoro, Kala, Kumbi, Kumenini, Kuntunkuni, Lannea, Leko, Loloti, Ngolo ngoloti, Oyinyin, Purukuma, Tchiko, Tyetebu Distributed in: Angola, Cameroon, Congo, Gabon, Ghana, Ivory Coast, Liberia, Nigeria, Uganda, Zaire (Africa) Distribution overview: West and Central Africa (mainly in Ivory Coast, Ghana, Cameroon, and Zaire). Common uses: Balusters, Bedroom suites, Boxes and crates, Building construction, Building materials, Cabinetmaking, Canoes, Casks, Chairs, Chemical derivatives, Chests, Concealed parts (Furniture), Construction, Core Stock, Decorative plywood, Desks, Dining-room furniture, Domestic flooring, Dowell pins, Dowells, Drawer sides, Excelsior, Factory flooring, Fine furniture, Floor lamps, Flooring, Fuelwood, Furniture , Furniture components, Furniture squares or stock, Hardboards, Hatracks, Interior construction, Interior trim, Joinery, Kitchen cabinets, Light construction, Living-room suites, Matchboxes, Matches, Millwork, Moldings, Office furniture, Packing cases, Parquet flooring, Particleboard, Plywood, Pulp/Paper products Product sources: The ITTO reports that timber from this species is produced and exported in negligible quantities. Environment profile: Secure in many areas of its range Tree size: Trunk diameter is 150-200 cm
Colors: the heart isWhite to cream, Yellow to golden-yellow to orangeand the sapwoodColor not distinct from heartwood, White to yellow.The grain isStraight, the textureMediumand the lusterSilvery luster
Natural durability: Susceptible to attack from termites (Isoptera), Susceptible to marine borer attack Odor: Tasteless Silica Content:
He wood contains silica which tends to interfere with some machining operations.
Kiln Drying Rate: Naturally dries quickly
Drying Defects: Distortion, Splitting Ease of Drying: Veneer dries relatively rapidly, with little degrade except slight tendency to split Tree Identification: Bole/stem form is straight Comments: Fairly stiff General finishing qualities are rated as good Moderately resiliant Pliable Soft Blunting Effect: Severe blunting effect on cutting tools due to high silica content Boring: Fairly easy to very easy Cutting Resistance: Moderate to saw Gluing: Very good properties
Nailing: Good nailing properties, Holds nails well Planing: Very Good to Excellent Resistance to Impregnation: Sapwood is moderately resistant Response to hand tools: Fairly Difficult to Difficult to Work Sanding:
Although there is a tendency for surfaces to be fuzzy, a good finish can be obtained with care
Screwing: Good screw holding properties, Good screwing properties;
Polishing: Good;
Bending strength (MOR) = medium Max. crushing strength = medium Hardness (side grain) = very soft Density (dry weight) = 38-45 lbs/cu. ft. Density (dry weight) = 31-37 lbs/cu. ft. Density (dry weight) = 23-30 lbs/cu. ft. Bending strength (MOR) = low Shrinkage, Volumetric = moderate Shrinkage, Volumetric = fairly large Modulus of Elasticity (stiffness) = low Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchEggeling, W.J.,1940,Indigenous Trees of Uganda,Govt. Printer Entebbe UgandaErfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentFouarge, J., Gerard, G.,1964,Bois du Mayumbe,I.N.E.A.C. BelguimHedin, 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. LondonITTO.1986.Tropical Timber Atlas, Volume 1 - Africa.International Tropical Timber Organization (ITTO) and Centre Technique Forestier Tropical (CTFT, 45bis, Avenue de la Belle Gabrielle, Nogent-sur-Marne Cedex, France.Keay, R.W.J.,1964,Nigerian Trees Vol.2,Nigeria Federal Department of Forest Research, IbadanKennedy, J.D.,1936,Forest Flora of Southern Nigeria,Government Printer LagosPieters, A.,1977,Essences Forestieres du Zaire,R.U.G. Gent BelguimSallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Taylor, C.J.,1960,Synecology and Silviculture in Ghana,University College of Ghana Thomas Nelson and SonsWCMC. 1992. Conservation Status Listing - Trees and Timbers of the World. World Conservation Monitoring Center-Plants Programme, Cambridge, CB3 ODL, United Kingdom. |
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