Mushroom

Today I joined some people from a nature organisation in a walk to look for mushrooms. We managed to find several. I tried keeping up with the names, but I'm afraid I don't seem able to retrieve the name of this pretty delicate one from the notes I made. I don't think I'll remember any of the names, but I had a good day. :-)

Update: I found a similar mushroom on blip, it's a pleated inkcap.