Common on black cherry trees. It is a edible fungus when young. This is a picture of the exposed fruiting body of the fungus. It grows on the heartwood of the tree.

Caused from to much moisture. Symptoms are often apparent from late spring to early summer but additional cycles of disease can result in damage which is visible later in the growing season.

A burl is a growth is which the grain has grown in a deformed manner. A burl results from some form of stress. It may be caused by injury, virus, or fungus.

Elongate hemlock scale disease is a armored scale insect. Females are brown. Males are white. Treatable.

Frothy Flux is caused by microorganisms that ferments the sap that seeps or bleeds from cracks and wounds in the bark.

Agrilus planipennis Known as the Emerald Ash Borer Beetle. It is a jewel green beetle from Eastern Asia that feeds on ash species.

Caused from girdling root. Girdling Roots are roots that grow around the stem and restrict water and nutrients. These roots can and will cut into the trunk.

Adventitious Roots are roots that grow off the aerial part of the stem of a tree or plant. Typically the tree will respond with these type of roots when injury occurs as a defense. This tree was struck by lightning and it created a large scar on the tree. The tree was trying to compartmentalize the wound. The wound was very large and the dead wood begin to rot.