The trees exchange carbon dioxide and oxygen with the atmosphere through little “mouths” in their leaves and tiny “windows” in their bark.

Figuring out black walnut tree identification is imperative for homeowners ... Search for black walnut trees by the color of their bark—varying from pale, grayish brown to deep chocolate brown.

On this edition of ID That Tree, Purdue Extension forester Lenny Farlee introduces ... which come out at nearly 90 degree angles to the stump, its alligator like bark and small berries.

In this episode of ID That Tree, meet the ash family ... resembling a smiley face. The bark is gray and featured an interlacing network of ridges forming a diamond shape.

This process cleanses the tree of pollution that has been stored in the outer bark. The plane tree is monoecious ... a key characteristic that occurs only in this species and helps with identification ...