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.
(fresh and dried) Black Fungus: (Auricularia polytricha) see illustration. Also known as cloud ear; tree ear; wood fungus, mouse ear, and jelly mushroom. It grows rapidly on a variety of woods including mango and kapok and is very similar to another fungus called Jew's ear (A. auricula). Some say the smaller cloud ear or mouse ear has a more delicate flavour than the larger wood ear.