Fraxinus excelsior — known as the ash, or European ash or common ash to distinguish it from other types of ash — is a species of Fraxinus native to most of Europe from Spain to Russia, with the exception of northern Scandinavia and southern Iberia. It is also considered native in southwestern Asia from northern Turkey east to the Caucasus and Alborz mountains.
An oak is a tree or shrub in the genus Quercus of the beech family, Fagaceae, having approximately 600 extant species. The common name "oak" may also appear in the names of species in related genera, notably Lithocarpus. The genus is native to the Northern Hemisphere, and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in Asia and the Americas.
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