Good Eatin': How to Avoid Poisonous Mushrooms (California Poison Control System)

"There are no non-scientific tests or rules that can accurately determine the safety or toxicity of a mushroom....'poisonous mushroom' means any mushroom or toadstool that causes an adverse or negative reaction when eaten. Symptoms can range from 6 hours of vomiting to lethal liver or kidney failure....There is no antidote for mushroom poisoning!" -- from the website.

<http://calpoison.org/public/mushrooms.html>