The term oak can be used as part of the common name of any of about 400 species of trees and shrubs in the genus Quercus (from Latin "oak tree"), which are listed in the List of ...
http://en.wikipedia.org/wiki/Oak

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Quercus robur (sometimes considered Q. pedunculata) is commonly known as the pedunculate oak or English oak. It is native to most of Europe, and to Asia Minor to the Caucasus, and ...
http://en.wikipedia.org/wiki/Pedunculate_oak

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