Amanita phalloides, commonly known as the death cap mushroom, is a highly toxic fungus found in various parts of the world, particularly in Europe and North America. It typically has a greenish or yellowish cap and white gills, making it resemble some edible mushrooms. Consuming even a small amount can lead to severe liver and kidney damage, often resulting in death. This mushroom grows in association with certain trees, forming a symbiotic relationship known as mycorrhiza. It is often mistaken for safe-to-eat species, which increases the risk of accidental poisoning. Proper identification is crucial for foragers and mushroom enthusiasts.