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MUGONHA (Breonadia salicina)
Trade Name
Mugonha
Scientific Name
Breonadia salicina (Vahl) Hepper & Wood
Family
RUBIACEAE
Common Names
Matumi (South Africa); Adina (Uganda); Adina (Tanzania); Mulamandia (Kenya); Adina (Kenya); Muonha (Mozambique); Mugonha (Mozambique)
Scientific Name Synonyms
Nauclea microcephala Del.; Adina microcephala (Del.)Hiern; Adina lasiantha Schum.
Description Of The Tree
Botanical Description
The tree reaches a height of 32 m, with trunk diameters of 80 cm. The bole is straight and not always regular, medium to highly fluted, with buttresses.
Natural Habitat
Breonadia salicina is reported along water-courses and in gallery forest.
Natural Distribution
East and South Africa.
Wood Identification
Anatomic Description Of Wood
Wood diffuse porous. Vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 micras or less (very small). Vestured pits. Vessels per mm2 more than 20 (very abundant). Simple perforation plates. Vessel-ray pits similar to intervessel pi Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Rays more than 10 per mm (abundant). Rays non-storied. Rays 1 to 2 seriate. Heterogeneous rays and/or multiseriate heterogeneous rays. Non-septate fibers. Fibers with distinctly bordered pits. Fibers with vestured pits.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is yellowish brown with dark veins, it is not clearly demarcated.
Grain
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Texture
The wood is typically fine in texture.
Luster
The wood surface is described as low in luster.
Natural Durability
Very durable to decay; without preservative treatment. This species is especially suited for all the uses with risks of permanent or long-lasting humidification. Resistant to termites attack. Heartwood is resistant to Lyctus attacks.
Natural durability index (1= Very high durability, 7=Vey low durability)
1
Resistance To Impregnation
Nearly impossible to treat with a too much low penetration of the preservative substances.
Wood Physical Properties
Drying Defects
Ease of Drying: An extremely difficult timber to season. It dries slowly, develops small surface cracks and is susceptible to case-hardening stresses. Slow seasoning under cover in sheltered location gives the best result. Seasoning in log form followed by conversion and Drying Defects: Even under mild conditions, planks usually develops numerous surface cracks which may still increases on further drying. Thick scantlings are also liable to severe splitting. But in general, the timber does not warp. Kiln Schedules: In Malaysia kiln-drying schedules B or G are recommended depending upon wood density. To check case hardening, steam treatment at periodic intervals during kiln drying for as many as 2-4 hours each is recommended, depending upon the intensity of case hard
Recommended Dry Kiln Schedule
FR-13
Wood Chemical Properties
Wood Mechanical Properties
Workability
Sawing
Sawing of this species requires powerful equipment.
Rotary Veneer Cutting
Not suitable for veneering.
Sliced Veneer
Not suitable for veneering.
Blunting Effect
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Machining
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.
Planing
Moderately easy; tools must be cautiously sharpened.
Moulding
Moderately easy; tools must be cautiously sharpened.
Boring
Moderately easy; tools must be cautiously sharpened.
Mortising
Moderately easy; tools must be cautiously sharpened.
Nailing
Pre-boring is necessary.
Gluing
Difficult to glue because of the extracts content.
Sanding
Easy to perform; it gives good results.
Polishing
Can be polished without surface preparation.
Response To Hand Tools
Working with hand tools is difficult.
REFERENCED USES
End Uses Summary
EXTERIOR GENERAL, bridges, piers, HOUSING GENERAL, beams, joists, flooring, parquet, steps, panelling, OTHER AND MUSICAL INSTRUMENTS, handicrafts
Exterior General
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Bridges
- 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
Piers
- 9 - Maderas latinoamericanas. IV, Nectandra sp. Ocotea austinii, Persea sp. aff. vesticula, Persea schiedeana
General Housing
- 10 - Silica in Timbers
Beams
- 11 - Prospect: The wood database
Joists
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Flooring
- 14 - Handbook of Hardwoods
Parquet
- 15 - Empire Timbers
Steps
- 17 - Tree Conservation Database
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
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