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.
The body of a fungus starts as a single spore landing via wind currents or expelled from the fruiting structure. That spore grows into a strand called a hyphae; groups of these hyphae all grow together forming whatâs called a mycelia mat. Sometimes this is visible as a white coating or mass. When the fungus matures and the weather is right, a fruiting structure appears above ground. This is the part we notice.