Fungus on dead Spiraea

Fungus on dead Spiraea

Observation - Fungus on dead Spiraea. Description: The fungus has appeared on a sadly dead Spiraea. The Spiraea suffered in the very cold winter of 2010, the winter of 2011 finished it off. I left it, in case it recovered. I plan to cut it down & dig it out soon, do I need to be wary of the fungus which i

The fungus has appeared on a sadly dead Spiraea. The Spiraea suffered in the very cold winter of 2010, the winter of 2011 finished it off. I left it, in case it recovered. I plan to cut it down & dig it out soon, do I need to be wary of the fungus which is attacking the dead wood?
TIA.