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.
A fungus (plural: fungi) is a kind of living organism: yeasts, moulds and mushrooms are types of fungi. The fungi are a separate kingdom of living things, different from animals and plants.Fungi have cells with nuclei.Their cell walls contain chitin, unlike the cell walls of plants, which contain cellulose. These and other differences show that the fungi form a single group of related organisms, called the Eumycota or Eumycetes.They share a common ancestor and are monophyletic group.ungi reproduce both sexually and asexually. Some fungi grow mushrooms: these are fruiting bodies. Under the cap there are gills; the gills bear spores that will disperse, and may develop into new fungi. Otherwise, fungi use a sporangium to bear asexual spores by mitosis, or sexual spores by meiosis.