Fungus fun

A few fungi spotted this winter:

Armillaria (honey fungus) rhizomorphs

Kretzschmaria deusta on beech

Pleurotus ostreatus (oyster mushroom) on a very ill-looking horse chestnut

Piptoporus betulinus (birch polypore) on, um, birch

A top view...

...and a bottom view of Trametes gibbosa (lumpy bracket) found on a beech stump

Ganoderma (not sure which species - resinaceum? applanatum?) - there was plenty of it on a fallen beech

and, finally:

a fungus in symbiosis with an alga, or otherwise known as a lichen. Possibly a Parmelia species?