[mollisia]

Hallo,

I wanr to give my comments to these pictures too, although it makes it not easier I fear.

1.) I wouldn't have recognized Flamuulina velutipes when looking at the stipe. The underside of the cap are very well Flammulina. So I don't have a better idea for it, although it still makes me feel uncomfortable.

2.) Although you seem to have an accordance that the tree is birch, I would have said it is Alnus or may be even Corylus.
The pyreno on it is in my opinion very old Hypoxylon fuscum.

3.) I dont think it is Diatrype stigma, but for me it is without much doubt Biscognauxia nummularia. "Must" be Fagus then, this species is very strictly confined to it and exceptions are very rare (if they exist).

best regards,
Andreas