Cork

The name applied to the outer impervious mostly not-living part of the bark. Most bark, develops a corky exterior, and in some cases it becomes very prominent. In Enonymous thunbergianus, the English maple, the corky barked elm, and other trees and shrubs, it forms wings on the branches. The cork of commerce comes from the bark of Quercus ilex (better known as Q. Suber), plantations of which grow in southwestern Europe. The cork tree of the catalogues, Phellodendron amurense, is a curious tree, cultivated for ornament.

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This article contains a definition from the Glossary of Gardening Terms.