Amanita muscaria.Fly agaric..
Fly agaric toadstool
Amanita muscaria, commonly called fly agaric or less often fly mushroom, is a basidiomycete mushroom of the genus Amanita.
The original white-spotted red toadstool, it is one of the most recognizable mushrooms and is widely encountered in popular culture.
Though it is generally considered poisonous, Amanita muscaria is otherwise famed for its hallucinogenic properties, which had a religious significance in Siberian culture and possibly ancient India and Scandinavia.
Since mediaeval times it has been used as an insecticide, from where it derives its name.
Consuming more than about one gram of Amanita muscaria can cause nausea and a number of other effects, depending on dosage, ranging from twitching to drowsiness, cholinergic effects (lower blood pressure, increase sweat and saliva), visual distortions, mood changes, euphoria, relaxation, and hallucinations.