In the jargon of the forest , a forest gasoline generally indicates a species of Arbre, but it can be sometimes a subspecies or variety which is of interest in Sylviculture and which has biological requirements or particular employment.

The foresters distinguish as follows:

• according to botanical classification, the Leafy , species generally with null and void foliage, which are Angiosperme S, and the Résineux (with persistent foliage, except for the Mélèze S), which are gymnospermes;
• according to their origin, indigenous or spontaneous gasolines, in opposition to the introduced or exotic gasolines;
• according to the morphology of their system racinaire: the gasolines with rooting swivelling (which claim deep grounds) of those with rooting surface or tracing;
• according to their biology:
• or not rustic rustic gasolines, according to their degree of resistance to the winter and spring frosts;
• gasolines of shade or light, according to their capacity to grow under cover or not;
• the gasolines calcifuges or calcicoles, acidiphiles or neutrophiles, according to their requirements compared to the nature of the ground;
• hygrophile or xerophilous gasolines, according to their requirement in moisture or their adaptation to the dryness;
• according to their useful lifespan, longévives gasolines (250 to 300 years) or not very longévives;
• according to their behavior in association: the dominant gasolines, also called social gasolines because they are able to form important settlements, and the subordinated gasolines, often met in settlement disseminated.

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• List of the European forest gasolines

• List of the tropical forest gasolines

See too