Paarse schijnridder (Lepista nuda)

Hoi! It looks like the Lepista nuda, but it actually is Laccaria amethystina. The L. nuda has a smooth cap surface, is more convexed often with an umbo and the center is often a bit yellowish. Furthermore L. nuda is fleshier and brittle. L. amethystina is more "grillig" in its appearence and it has a very fibrous stipe, which can be quite tough. The easiest way to tell them apart, is to look at the gills. L. nuda has thinner gills which stand closer together and they're emarginate. L. amethystina has thick and wide apart gills and the gills are widely attached to the stipe.
http://en.wikipedia.org/wiki/File:Lepist...
http://www.flickriver.com/photos/2242293...