Amanita muscaria is the botanical name of the fungi more commonly known as the fly agaric mushroom. The Amanita genus contains both edible and poisonous species of mushrooms. There are over 600 different species of Amanita in the genus.
The fly agaric mushroom itself is rarely toxic to humans, but some species of Amanita are. They are thought to be involved in a majority of human deaths from eating poison mushrooms.
Although it does not look like Amanita muscaria, the most deadly mushroom in the Amanita genus is Amanita phalloides, more commonly known as the death cap, or deadly white cap. Amanita phalloides alone, is thought to be involved in about half of human deaths that result from eating poison mushrooms.