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.
But this is a fungus blog. Aureobasidium is an interesting, sticky, goopy, ubiquitous thing. You can admire its slimy brown mugshot here. Itâs really, really good at growing superficially (like many politicians it is impressive, but lacks depth).