Simocybe phlebophora?
On dead wood.
Found by @SigridJakob
One of the biggest fungi I have ever seen! Boot is for size comparison.
Did not notice any pseudo stipes to indicate another species, although pseudostipes do disappear in time..., quite tall, but without further info. I will say austrofilopes.
Dispersed ring of mushrooms ranging in size from 10 cm to 2cm