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. A Filamentous Fungus: Rhizopus (Black bread mold). 1  On an amenable medium, Rhizopus can be seen with the naked eye, appearing as a fuzzy white mat growing all over the surface.( 2 And down into the medium. 3  And even over the top of the petri dish sometimes.) This is the mycelium, or body of a fungus. On an amenable medium, Rhizopus can be seen with the naked eye, appearing as a fuzzy white mat growing all over the surface. ( 2 And down into the medium. 3  And even over the top of the petri dish sometimes.) This is the mycelium, or body of a fungus. 4  Each strand is called a hypha (plural, hyphae).