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.
What does beech look like? Overview: mature trees grow to a height of more than 40m and develop a huge domed crown. The bark is smooth, thin and grey, often with slight horizontal etchings. The reddish brown, torpedo-shaped leaf buds form on short stalks, and have a distinctive criss-cross pattern.