LUDAI (Sapium baccatum)

Nom commercial

Ludai

Nom scientifique (avec auteur)

Sapium baccatum Roxb.

Famille

EUPHORBIACEAE

Noms communs (pays)

Rulus; Pudlikat; Mayang; Mamas-mamas pelandok; Ludahi; Lelun; Larrna; Lal kainjal; Kradard; Kayu nilus; Kadat; Boedi; Billa; Bedi; Adamsali; Ludai pelandok (Malaysia); Ludai (Indonesia); Budi (Indonesia); Banai (Indonesia); Pho bai (Thailand); Salee nok (Thailand); Mousedeer`s rubber tree; Ludai (Sumatra); Memaya (Malaysia)

Synonymes du nom scientifique (avec auteurs)

Stillingia baccata (Roxb.) Baill.; Sapium populifolium Wallich ex Wight; Excoecaria baccata (Roxb.) Müll. Arg.; Excoecaria affinis Griff.; Carumbium baccatum (Roxb.) Kurz

DESCRIPTION DE L'ARBRE

Description botanique

It is a deciduous, monoecious, small to medium-sized trees up to 30 m tall. The bole is columnar to sinuous, up to 60 cm in diameter, sometimes fluted at base or with steep buttresses.

Habitat naturel

Sapium species are found scattered in well drained primary and secondary evergreen to deciduous rain forests, up to 800 m of altitude.

IDENTIFICATION DU BOIS

Description anatomique du bois

Wood diffuse porous. Occasionally vessels in radial multiples of 4 or more common. Tangential diameter of vessel lumina 200 micras or more (large). Vessels per mm2 5 to 20. Vessels per mm2 less than 6 (rare). Simple perforation plates. Intervessel pits medium, Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Siliceous bodies in the axial parenchyma cells. 5 to 8 cells per parenchyma strand. Over 9 cells per parenchyma strand. Axial parenchyma in narrow bands on lines up to 3 cells wide. Rays more than 10 per mm (abundant). Ray height more than 1 mm. Rays exclusively uniseriate. Silica bodies in the ray cells. All ray cells upright and/or square. Body ray cells procumbent with over 4 rows of upright and/or square marginal cells (Kribs-I). Fibers very thin walled. Fibers with simple to minutely bordered pits.

Disponibilité

Statut CITES

Unrestricted

DESCRIPTION GÉNÉRALE DU BOIS

Teinte

The heartwood is pale yellow-brown, not clearly differentiated from the sapwood.

Grain

The grain is straight to deeply interlocked, occasionally wavy.

Texture

The texture is moderately coarse and even.

Durabilité naturelle

It is non-durable under exposed conditions.

Index de durabilité naturelle (1 = Très élevée, 7 = Très faible)

Résistance à l'imprégnation

It is a permeable wood, with good preservatives retention.

PROPRIÉTÉS PHYSIQUES DU BOIS

Densité basale ou gravité spécifique (poids anhydre/vol. saturé) (g/cm³)

0.36

Densité sèche à l'air (poids et volume à 12%TH) (g/cm³)

0.38

Retrait tangentiel total (saturé à 0%TH) (%)

4.9

Retrait radial total (saturé à 0%TH) (%)

2.1

Défauts dus au séchage

Ease of Drying: Drying is easy; it can be performed without any problem. Drying Defects: No particular risks of drying defects, subject to normal drying conditions. Kiln Schedules: The kiln schedule has been tested.

Ratio de stabilité dimensionnelle (% retrait tangentiel total/% retrait radial total)

2.3

Sciage

Sawing of this species is easy.

Coupe de placage de déroulage

It is used for cores in veneer or plywood.

Placage tranche