Beefsteak Fungus
Fistulina hepatica

Beefsteak Fungus on a fallen oak tree in Trawscoed hay meadow Creative Commons Attribution Share Alike: Bruce Langridge
Have you ever noticed how the fallen remains of oaks and sweet chestnuts can persist for decades?
Beefsteak fungus is one of the few specialist fungal species that can rot their heartwood. Look for its fruiting body on the large fallen oak along our Welsh Country Walk. In damp weather, this can ooze a liver-red liquid.