<a href="http://www.strangeattractor.co.uk/further/archives/fungiglow.jpg"><img alt="fungiglow.jpg" src="http://www.strangeattractor.co.uk/further/archives/fungiglow-thumb.jpg" width="300" height="199" border="0" /></a>

The mushrooms are part of the genus Mycena, a group that includes about 500 species worldwide. Of these only 33 are known to be bioluminescent—capable of producing light through a chemical reaction.

From <a href="http://news.nationalgeographic.com/news/2006/10/061026-fungi-glow.html">National Geographic</a>

Thanks Anthony Matt!