The death cap is a highly toxic mushroom known scientifically as Amanita phalloides. It is responsible for the majority of mushroom poisoning cases worldwide. The mushroom has a distinctive appearance, often featuring a greenish or yellowish cap, white gills, and a white stem. Consuming even a small amount of the death cap can lead to severe liver and kidney damage, and it can be fatal without prompt medical treatment. It is important for foragers to be able to identify this mushroom and avoid it, as it closely resembles some edible species, such as Agaricus bisporus (the common button mushroom).