A fungal fruiting body of the fungus Dryad’s Saddle (Polyporous squamosus) had been evident for several years prior to the limb failure.

This is usually a localised decay, however the extent of decay plus the mass of the limb led to a spectacular failure, ripping a large area of living tissue from the tree: the prognosis for this tree is not good.

Mike says:

“The tree could have been saved if the diseased limb had been removed by a competent tree surgeon before it failed and ripped a large strip of cambium off the stem. If you notice any fungi on your tree, it it worth calling a professional consulting arborist to make sure it is safe.”