Tannin . It is used for ink and dyes and in the leather making industry.
Oak trees interact with the things that eat the bark or the acorns. It also interacts by growing and shedding leaves
Maple trees are known for their vibrant red leaves in autumn. Other types of trees that can also turn red in autumn include oak trees, dogwood trees, and sweet gum trees.
The bark of cork trees. Often the Cork Oak. This does not damage the tree.
The bark of oak trees peels off as part of the tree's natural growth process. As the tree expands in girth, the outer bark layer becomes tight and eventually cracks and peels away to make room for new growth. This shedding of bark also helps the tree get rid of any accumulated pests or diseases.
The African oak trees are not edible. They can be found in the country of Africa and grow to be very tall with a reddish-brown coloration on its bark.
http://science.howstuffworks.com/question550.htm Cork comes from the bark of Quercus suber.
Cork is a plant cell; it is the bark of the "cork oak" a type of oak tree that grows in Spain and similar climates.
To identify white oak tree bark, look for light gray to white bark with deep furrows and ridges. White oak bark is typically scaly and has a rough texture.
Bark is from trees. The trees grow bark to protect the tree.
You can identify an oak tree by its distinctive lobed leaves, acorns, and scaly bark. Oak trees also typically have a broad, spreading canopy and are commonly found in temperate regions around the world.
To identify oak bark, look for deep furrows and ridges with a grayish-brown color. Oak bark is also known for its rough texture and can sometimes have a scaly appearance. Additionally, oak bark may have a distinct smell that is earthy and slightly sweet.
Oak and birch trees are both types of deciduous trees that lose their leaves in the fall. They also provide valuable habitats for wildlife and have been used in various cultures for their wood for construction and crafting. Additionally, both oak and birch trees have distinctive and recognizable bark patterns that help in their identification.