Lichens are a combination of algae and fungus that often appear as white or gray blotches on the bark. They make their own food using the sun's rays so they don't feed on the tree and don't harm it.

A native Pennsylvania hardwood tree is facing extinction. Beech trees are being attacked by two separate diseases – one moves ...

Strolling through certain neighborhoods or rural landscapes, you might encounter an unusual sight: trees with their lower ...

This follows laboratory tests which proved it to be 85 per cent effective in combating the disease. The drug, derived from the bark of the African bush willow tree, has been shown to work by ...

Photo courtesy of the Vermont Department of Forest, Parks and Recreation For decades, beech trees in Vermont have already been infected with beech bark disease, which gives beech trees bumpy bark.

Dear Neil: What is wrong with my live oak? I hope it’s not a disease, since I have five others in my yard, and I don’t want ...

Dear Grant, William and Kate, When I was little, I liked to climb trees. I loved to grip the bark as I got higher and higher. Now I mostly hug trees – but I still love the way bark feels under ...