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The tree is also sometimes cultivated for ornament.Hybrids with turkey oak (Quercus cerris) are regular, both in the wild in southwest Europe and in cultivation; the hybrid is known as Lucombe oak Quercus × hispanica.As a pyrophyte, this tree has a thick, insulating bark that makes it well adapted to forest fires.After a fire, many tree species regenerate from seeds (as, for example, the maritime pine) or resprout from the base of the tree (as, for example, the holm oak).In the Mediterranean basin the tree is an ancient species with fossil remnants dating back to the Tertiary period.It grows to up to 20 m (66 ft), although it is typically more stunted in its native environment.Quercus suber, commonly called the cork oak, is a medium-sized, evergreen oak tree in the section Quercus sect. It is the primary source of cork for wine bottle stoppers and other uses, such as cork flooring and as the cores of cricket balls.
Only the bark is extracted, and a new layer of cork regrows, making it a renewable resource.
The tree forms a thick, rugged bark containing high levels of suberin.