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.
[Webster 1913 Suppl.]