1 Iritis is uncommon, but can be due to trauma, infections, or autoimmune conditions. Symptoms include pain, red eye, and often, decreased vision.  Optic neuritis. The nerve travelling from the back of the eyeball into the brain can become inflamed.
Oak root fungus, or white rot, is a widespread disease that becomes visible just beneath the bark and on roots. What looks like layers of light brown to tan mushrooms form in clusters at the base of the trees.
Although a few mushrooms with stems grow on tree bark, most do not. Bark mushrooms typically grow in the form of conk, also called a bract or shelf.Although some varieties of bark mushrooms are harmless, some cause what is called white rot, and some cause the more serious brown rot.A few mushrooms that grow on bark are edible, but most are not.Bark mushrooms most often grow in cool, rainy coastal areas and on the shady, north side of trees.ark mushrooms typically grow in the form of conk, also called a bract or shelf. Although some varieties of bark mushrooms are harmless, some cause what is called white rot, and some cause the more serious brown rot.