Hard wood

The hard wood generally indicates the Bois leafy trees (often with null and void sheets, but not necessarily, in the case of the tropical trees) or Arbre S Angiosperme S. hard wood differentiates tender Bois, which often comes from coniferous tree or trees Conifère S. In general, the wood of the leafy trees has a density higher than wood of conifers, but there exist actually considerable variations with regard to the hardness of wood in the two groups, with an significant amount of covering; certain wood of angiospermes (as the balsa) are more tender than the majority of the wood of coniferous tree, whereas the yew is an example of wood of coniferous tree which is particularly hard. Wood hard push in the subtropics as in Africa and also in Europe and other areas such as Asia. What characterizes mainly the wood of the leafy tree of the wood of the coniferous trees is the presence of pores, or vessels.

The species of leafy trees are diversified than the coniferous trees. There exist hundred times more species with wood of leafy trees. The vessels differ in the face, the form of the perforations (simple, scalariform, réticulée, foraminée), and on the level of the structure of the cellular wall (cad thickening in spiral).

Wood hard are employed in a broad range of applications of which construction, joinery, making of floors, tools, etc

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