Strange bark pattern
Hello and thanks for using the Ask an Expert System.
Could you provide additional information such as where this photo was taken? How was the tree identified?
I spoke to Penn State Extension Urban Forester, Vincent Cotrone. He stated, “Not sure what the actual cause of the issue is, but it could be something like the formation of Burls, which are growths on the trunks of trees that are often caused by a bacterium.”
If you have additional questions you can contact the Lycoming County Master Gardener Hotline.