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Landa
Landa (Erythroxylum mannii)

Family: Erythroxylaceae

Common names: Bimini, Dabe, Ditsumi, Landa, Lukienzo, Luzinzou, N'dabe, N'kanza, Ndabe, Nkanza, Pepesia

Distributed in: Benin, Cameroon, Congo, Gabon, Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone, Zaire (Africa)

Distribution overview: Sierra Leone to Cameroon, and inland to the Congo, though fairly sparse. Occurs in both evergreen and deciduous forests, often present in small groups.

Common uses: Beams, Boat building (general), Boxes and crates, Building construction, Cabin construction, Cabinetmaking, Carvings, Chairs, Chests, Concealed parts (Furniture), Concrete formwork, Construction, Decks, Decorative plywood, Decorative veneer, Desks, Dining-room furniture, Dowell pins, Dowells, Drawer sides, Excelsior, Factory construction, Figured veneer, Fine furniture, Floor lamps, Flooring, Form work, Foundation posts, Framing, Fuelwood, Furniture , Furniture components, Furniture squares or stock, Furniture, Hatracks, Heavy construction, Joinery, Joists, Kitchen cabinets, Light construction, Living-room suites, Millwork, Mine timbers, Office furniture, Paneling, Plywood, Poles, Porch columns, Posts, Pulp/Paper products, Radio - stereo - TV cabinets, Rough construction, Rustic furniture, Stools, Turnery, Vats, Vehicle parts, Veneer: decorative

Environment profile: Status has not been officially assessed

Tree size: Tree height is 20-30 m

Colors: the heart isReddish brown, Yellow to golden-yellow to orangeand the sapwoodGrey, White to yellow.The grain isWavy, the textureMediumand the lusterLustrous

Natural durability: Susceptible to attack from termites (Isoptera), Susceptible to marine borer attack

Odor: No specific smell or taste

LightInduced Color Change: Darker

Kiln Schedules: Drying (speed) is fast

Drying Defects: No twisting or warping, Slight end splitting

Ease of Drying: Fairly Easy

Tree Identification: Bole/stem form is straight

Comments: General finishing qualities are rated as good

Blunting Effect: Slight effect

Boring: Bore holes are smooth on the surface

Carving: Good results

Cutting Resistance: Cutting Resistance with dry wood is easy

Gluing: Good properties

Mortising: good

Moulding: Good moulding properties

Movement in Service: Good moulding properties

Nailing: Easy to nail, Holds nails well

Planing: Easy to plane

Resistance to Impregnation: Sapwood is moderately resistant

Response to hand tools: Yields a smooth, clean finish

Routing recessing: Good in both routing and recessing.

Sanding: Yields smooth, clean surfaces

Screwing: Fairly good characteristics, Good screw holding properties; Turning: Yields smooth, clean surface.

Painting: Good; Polishing: Very good; Staining: Stains well; Varnishing: Good;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
Item Green Dry Metric
Specific Gravity 0,43 0,54
Density 657 kg/m3
Bending Strength 841 1156 kg/cm2
Crushing Strength 339 531 kg/cm2
Hardness 441 kg
Impact Strength 78 cm
Shearing Strength 119 kg/cm2
Stiffness 99 120 1000 kg/cm2
Tangential Shrinkage 8 %
Radial Shrinkage 3 %
Weight 641 512 kg/m3
Maximum Load 0,84 cm-kg/cm3
Toughness cm-kg
Static Bending kg/cm2
Item Green Dry English
Bending Strength 11967 16442 psi
Density 41 lbs/ft3
Hardness 973 lbs
Impact Strength 31 inches
Maximum Crushing Strength 4834 7555 psi
Shearing Strength 1699 psi
Stiffness 1409 1712 1000 psi
Work to Maximum Load 12 inch-lbs/in3
Specific Gravity 0.43 0.54
Weight 40 32 lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 8 %
Volumetric Shrinkage 11 %

Max. crushing strength = medium 0
Bending strength (MOR) = medium
Shrinkage, Radial = small
Hardness (side grain) = soft
Bending strength (MOR) = high
Modulus of Elasticity (stiffness) = low
Max. crushing strength = high
Density (dry weight) = 38-45 lbs/cu. ft.
Shrinkage, Volumetric = moderate
Shrinkage, Volumetric = fairly large
Shrinkage, Tangential = large
Shearing strength (parallel to grain) = low
Shrinkage, Tangential = small
Toughness-Hammer drop (Impact Strength) = low
Shrinkage, Tangential = very small
Shrinkage, Tangential = moderate
Shrinkage, Tangential = fairly large
Shrinkage, Radial = very small
Shrinkage, Radial = moderate
Shearing strength (parallel to grain) = very low
Shearing strength (parallel to grain) = medium
Modulus of Elasticity (stiffness) = medium
Hardness (side grain) = very soft
Density (dry weight) = 46-52 lbs/cu. ft.
Bending strength (MOR) = very high

Armstrong, F.H.,Mechanical and physical properties of Landa (Erythroxylum mannii,Forest Products Research Laboratory, Princes Risborough,, pp1-3Bertin, A., Meniaud, J.,1949,Timbers of the Cameroons,Compagnie Francais du Cameroon,(Transl. by F.Jane)Bois et Forets des Tropiques,1950,Landa (Erythoxylum mannii,Bois et Forets des Tropiques,No.13,pp43-6Bolza, E., Keating, W.G.,1972,African Timbers - the Properties, Uses and Characteristics of 700 Species,C.S.I.R.O. Div. of Building ResearchChudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Erfurth, T., Rusche, H.,1976,The Marketing of Tropical Wood A. Wood Species from African Moist Forests,F.A.O. Forestry DepartmentFrance - C.T.F.T./C.T.B.,1982,Guide pour le Choix des Essences Deroulables-pour la fabrication du,contreplaque,C.T.F.T./C.T.B. FranceFrance - C.T.F.T.,1960,Resultats des Observations et des Essais Effectues au CTFT sur le Landa,C.T.F.T. Information technique,No.71Hughes, J.F.,1971,The Principal Timber Trees of Cameroon,Unpublished dataIrvine, F.R.,1961,Woody Plants of Ghana,O.U.P. LondonJay, B.A.,1968,Timbers of West Africa,TRADA, Red Booklet SeriesKloot, N.H., Bolza, E.,1961,Properties of Timbers Imported into Australia,C.S.I.R.O. Forest Products Division Technological Paper,No.12Lavers, G. M.1966.The Strength Properties of Timbers.Forest Products Research Bulletin, No. 50.Ministry of Technology, Her Majesty's Stationery Office, London.Lavers, G.M.,1983,The Strength Properties of Timber (3rd ed. revised Moore G.L.,Forest Products Research Laboratory, Princes Risborough, Building Research,Establishment Report (formerly Bulletin No.50)Normand, D.,1937,Le Bois du Landa, Erythroxylum du Cameroun,Revue Bot. Appl. et Agricole,17196, pp883-9Rendle, B.J., Pettifor,Note on Brittleheart in Landa (Erythroxylum mannii,Forest Products Research Laboratory, Princes Risborough, TM 0/388Revue des Bois et de ses Applications,1957,Landa (Erythroxylum mannii,Revue des Bois et de ses Applications,12(12,p37Sallenave, P.,1955,Proprietes Phyiques et Mecaniques des Bois Tropicaux de l'Union Francaise,C.T.F.TSallenave, P.,1964,Proprietes Physiques et Mecaniques des Bois Tropicaux (Premier Supplement,C.T.F.T. Publ.,no.23Savill, P.S., Fox, J.E.D.,1967,Trees of Sierra LeoneTakahashi, A.,1978,Compilation of Data on the Mechanical Properties of Foreign Woods (Part,III) Africa,Shimane University, Japan, Research Report on Foreign Wood No. 7Unwin, A.H.,1920,West African Forests and Forestry,T. Fisher Unwin Ltd. London
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