'Violet pouch fungus (Cortinarius porphyroideus)' by Bernard Spragg. NZ

The violet pouch fungus (Cortinarius porphyroideus) is a truffle-like fungus found in the leaf litter of beech forests. Its spore-producing tissue is enclosed within its purple cap. Spores are released when the cap begins to disintegrate, or when insects and other small animals eat the tissue within the cap.

Found on flickr