Prototaxites, a prehistric 20 foot tall mushroom

I had read about this earlier today and dug up some links.

http://www.sciencedaily.com/releases/2007/04/070423080454.htm

http://www.cnn.com/2007/TECH/science/04/24/fossil.fungus.reut/index.html

http://www.xs4all.nl/~steurh/engprot/eprototx.html

http://en.wikipedia.org/wiki/Prototaxites