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What is a Chestnut Oak?

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  • Written By: Jessica Ellis
  • Edited By: Bronwyn Harris
  • Last Modified Date: 19 June 2018
  • Copyright Protected:
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    Conjecture Corporation
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The somewhat confusingly-named chestnut oak tree, scientifically known as Quercus prinus is a member of the oak tree family. Known for its love of rocky hill and ridge tops, the chestnut oak is native to eastern North America, most frequently found in the mountain ranges of the eastern United States. As with many oak species, the chestnut oak is often easily confused with related species, though some particular features help to differentiate this particular tree.

Commonly known as the rock or mountain oak, the tree is most often identified by its natural habitat. Unlike its cousin, the swamp bottom oak, which looks quite similar, the chestnut oak requires dry, rocky or sandy soil that has good drainage. Ridge lines and mountaintops rely on the species to provide food, shade and shelter for local species, including squirrels, chipmunks, birds, and larger mammals that feed on the bark and acorns. The tree tends to grow best in humid air and dry soil, making it ideally suited for the mountains of the eastern United States, such as the Appalachians.

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A relatively tall tree, chestnut oaks can reach over 130 ft (39.6 m) in height, though most mature adult specimens are between 60-70 ft (18.2-21.3 m). The tree is usually irregularly shaped, with a large, leafy crown. Throughout most of the year, the tree is covered with broad, ridged leaves that are a bright yellow-green in spring and summer, but fade to pale yellow during autumn. Acorns are numerous and quite large, and provide food for a variety of woodland and mountain creatures throughout the tree's native range.

The most distinguishing feature of the chestnut oak is its remarkably thick bark, which features a heavily grooved texture and a grey-brown color. In mature trees, the bark is often described as resembling the ridge pattern on alligators, though younger trees tend to have a smoother texture. High in tannins, the bark was once a choice material in the production of tanned leather.

The tree is often used for lumber, and is generally marketed as white or mixed oak. It is generally considered a mid-quality lumber tree, as trees tend to grow somewhat crooked and thus produce crooked lumber. Its preferred habitat of mountaintops also makes the tree sometimes inaccessible to logging and lumber pursuits.

In residential planting, the tree requires dry or sandy soil and partial shade in order to thrive. A humid climate is helpful for attaining strong growth, making the trees more likely to serve as residential trees near their native environments. The leafy canopies provide excellent shade, while the plentiful acorns can provide sustenance to suburban wildlife populations of birds and small mammals.

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