The Collaborative International Dictionary
deadly amanita
Fly amanita \Fly amanita\, Fly fungus \Fly fungus\ . (Bot.) A poisonous mushroom ( Amanita muscaria, syn. Agaricus muscarius), having usually a bright red or yellowish cap covered with irregular white spots. It has a distinct volva at the base, generally an upper ring on the stalk, and white spores. Called also fly agaric, deadly amanita.
Usage examples of "deadly amanita".
There was the dead white shape of Mycelium masses, the grotesqueness of Agaricus, the deformity of Deadly Amanita and of Morel.
What's the first thing you look for to be sure it isn't the deadly amanita?