SIMON FRASER / SCIENCE PHOTO LIBRARY SIMON FRASER / SCIENCE PHOTO LIBRARY
Fly agaric mushrooms (Amanita muscaria) are powerfully hallucinogenic, containing the drugs ibotenic acid and muscimol. The effects are unpredictable, and a few deaths have been attributed to this mushroom. It takes its name from the medieval practice of breaking the caps into a saucer of milk in order to stupefy flies. It is commonly found amongst birch trees in temperate regions in autumn.
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