Amanita crenulata

Amanita crenulata, also known as the poison champagne amanita is a species of fungus that is very common in the Northeast United States.
Description.
It is an ectomycorrhizal fungus, living in root symbiosis with a tree.
Biochemistry.
"Amanita crenulata" when ingested can produce symptoms associated with ibotenic acid/muscimol intoxication. It is considered poisonous.