Notes: 1 and 2 are the same mushroom, 3 and 4 are a mushroom that grew very close by. I think it grows on rotting wood, reminds me of Oudemansiella mucida. But that one is white (“porcelain”), whereas this one is very bluish-greenish. The cap has a little bit of whitish “fur”, the stem is furry below the ring. Above the ring, the stem is white-grey and smooth. The spore colour is probably brown or maybe pink-brownish.