Fungus on my Acer
Please help me to identify what is happening with my Acer (apologies that the picture appears to have flipped through 90 degrees)
The trunk of the tree (it is only three feet tall but definitely a tree!) is totally covered by an awful looking fungus. However, the canopy is more beautiful than ever and seems totally unaffected.
I would appreciate any advice regarding what is growing on my beautiful tree; what I need to do to remove it (assuming I need to); and whether it is a threat of any sort to the rest of the shrubs and perennials in my small garden.