MORA (Mora megistosperma)
Nom commercial
Mora
Nom scientifique (avec auteur)
Mora megistosperma (Pittier) Britton & Rose
Famille
LEGUMINOSAE
Noms communs (pays)
Pracuuba-Vermelha (Brazil); Pracuuba-Da-Várzea (Brazil); Pracuuba-Amarela (Brazil); Pracuuba (Brazil); Praculiba-Branca (Brazil); Mora (Venezuela); Nato (Ecuador); Alcornoque (Colombia); Mangle Nato (Colombia); Alcornoque (Panama); Alcornoque (Costa Rica); Pracouba (Brazil); Nato (Colombia); Paracuuba (Brazil)
Synonymes du nom scientifique (avec auteurs)
Mora oleifera (Triana ex Hemsl.) Ducke; Dimorphandra oleifera Triana ex Hemsl.; Dimorphandra megistosperma Pittier
DESCRIPTION DE L'ARBRE
Description botanique
Tree size is reported to attain a height of about 30 m, with a trunk diameter that can reach up to 80 or 100 cm over the buttresses. The boles are cylindrical or sometimes irregular, with commercial lengths of about 15 m. It presents slim and tall buttres
Habitat naturel
Mora megistosperma occurs gregariously in the varzea forests and in swampy areas along river banks and temporarily inundated forests. It is also reported growing at the sea level in tidal areas and in mangrove forests.
Répartition naturelle
Central and northern South America. It is reported in Costa Rica, Panama, Venezuela, Brazil, Colombia and Ecuador.
IDENTIFICATION DU BOIS
Description anatomique du bois
Wood diffuse porous. Vessels solitary and in short radial multiples. Tangential diameter of vessel lumina 150 to 200 micras (medium). Vessels per mm2 5 to 20. Simple perforation plates. Vessel-ray pits similar to intervessel pits in size and shape. Intervessel Axial parenchyma apparent with the naked eye. Axial parenchyma lozenge-aliform. Axial parenchyma confluent. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 3 to 4 cells per parenchyma strand. 4 to 10 rays per mm (medium). Rays 1 to 4 seriate. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Fibers with simple to minutely bordered pits.
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Vue macroscopique du bois (plan tangentiel)
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Vue microscopique d'une section transversale du bois
Disponibilité
Statut CITES
Unrestricted
DESCRIPTION GÉNÉRALE DU BOIS
Teinte
The sapwood is pinkish white, the heartwood is yellowish red with a dark brown tinge.
Index de Teinte (1 = Noir, 7 = Jaune clair)
4
Grain
This species is reported to have interlocked grain.
Texture
The wood is mostly medium in texture.
Luster
The wood surface is described as moderate in luster.
Durabilité naturelle
It is resistant to decay, dry wood insects and termites attack.
Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)
2
PROPRIÉTÉS PHYSIQUES DU BOIS
Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)
0.72
Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)
0.81
Retrait tangentiel total (saturé à 0%TH) (%)
7.2
Retrait radial total (saturé à 0%TH) (%)
4.0
Défauts dus au séchage
Ease of Drying: The rate of drying is reported to be slow to moderate. Drying Defects: Twisting and cupping are reported.
Calendrier de séchage en séchoir recommandé
UK-B; US-T2-C2
Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)
1.8
PROPRIÉTÉS CHIMIQUES DU BOIS
PROPRIÉTÉS MÉCANIQUES DU BOIS
Résistance à la flexion (module de rupture_MOR) 12%TH (kgf/cm²)
1265
Rigidité (module d'élasticité_ MOE) 12%TH (kgf/cm²)
155000
Résistance à la compression parallèle à la fibre 12%TH (kgf/cm²)
606
Résistance à la compression perpendiculaire à la fibre 12%TH (kgf/cm²)
94
Résistance au cisaillement (radial) 12%TH (kgf/cm²)
96
Dureté Janka (latérale) 12%TH (kgf)
560
Dureté Janka (extrémités) 12%TH (kgf)
760
OUVRABILITÉ
Sciage
Sawing of this species is reported to be rather difficult.
Coupe de placage de déroulage
It is not suitable for plywood because of its high density.
Placage tranche
It is not suitable for plywood because of its high density.
Effet d'émoussement
Wood of this species produces a moderate blunting effect.
Rabotage
The timber is reported to plane with moderate difficulty because of interlocked grain. A reduced cutting angle of 20 degrees is recommended.
Tournage
30
Clouage
Good nail-holding, pre-boring is necessary.
Collage
This species has a fair behavior in gluing.
Ponçage
The material is reported to sand with moderate difficulty.
Finissage
This wood yields a smooth surface in finishing.
Cintrage à la vapeur
Bending properties are reportedly moderate.
UTILISATIONS
UTILISATIONS FINALES (RÉSUMÉ)
EXTERIOR GENERAL, bridges, poles, crossties, HOUSING GENERAL, flooring, steps, FURNITURE AND CABINETS, PLYWOOD AND VENEER, TURNING, TOOLS, agricultural tools, CONTAINERS, truck bodies, NAVAL CONSTRUCTION, boats, port pillar, port storage, OTHER AND MUSICAL INSTRUMENTS, handicrafts
EXTERIOR GENERAL
- 1 - Tabela de resultados de ensaios fisicos e mecanicos
Ponts
- 2 - 25 madeiras da amazonia de valor comercial, caracterizacao, macroscopica, usos comuns e indices qualificativos
Poteaux
- 3 - Estudo dendrologico e determinacao das caracteristicas fisicas e mecanicas do genipapo (Genipa americana)
Traverses de chemin de fer
- 8 - Maderas latinoamericas. III, Podocarpus standleyi ,Podocarpus oleifolius, Drims granadensis, Magnolia poasana y Didymopanax pittieri
MEUBLES ET M. DE RANGEMENT
- 10 - Silica in Timbers
Planchers
- 14 - Handbook of Hardwoods
Marches
- 17 - Tree Conservation Database
MEUBLES ET M. DE RANGEMENT
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
PANNEAUX ET PLACAGE
- 25 - Directory of Timber Trade Malaysia
Tournage
- 30 - Embassy of Honduras in Japan
OUTILS
- 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Outils_agric
- 44 - Atlas of Peruvian Woods
Carros_camion
- 53 - Timbers of the New World
CONSTRUCTION NAVALE
- 55 - Tropical Timber Atlas of Latin America
Navires
- 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Ports piliers
- 61 - Manual de Diseño para Maderas del Grupo Andino
Port entreposage
- 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
Artisanat
- 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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