Hypholoma fasciculare (from the same Latin root as fascism: fasces meaning a bundle). These colourful fungi grow on rotten wood in clusters that can contain a huge mass of fruiting bodies. They look attractive but are highly toxic although not normally fatal.
Uploaded to Geograph by ceridwen on 15 September 2010
Photo © ceridwen, 15 September 2010. Licensed for reuse under this Creative Commons licence