From John Halamka of Life as a Healthcare CIO:"As part of my duties as an Emergency Physician, I do 200 toxicology consultations each year for patients in New England who eat wild mushrooms and seek medical care.
My complete (warning -it's a 21 megabyte Powerpoint) guide to mushroom poisonous identification and treatment is available online."
Image source: Amanita muscaria, from Wikipedia, the free encyclopedia, Creative Commons Attribution-ShareAlike 2.5 Netherlands.