A large, conspicuous mushroom, the Amanita is generally common and numerous where it grows, and is often found in groups of other mushrooms growing underneath trees. Amanita fruiting bodies emerge from the soil looking like white eggs. After emerging from the ground, the cap is covered with numerous small white to yellow pyramid-shaped warts. These are remnants of the universal veil, a membrane that encloses the entire mushroom when it is still very young.
Amanitas contains several biologically active agents, at least one of which, muscimol, is known to be psychoactive. Very few deaths have occurred from the ingestion of Amanita mushrooms.