Some of the most poisonous mushrooms belong to the genus Amanita. Toxic species of this genus have been called such names as “death angel” (Amanita phalloides) and “destroying angel” (Amanita virosa). Ingestion of a single cap can kill a healthy, adult human! Even ingesting a tiny bit of the amatoxin—the toxin present in species of this genus—may result in liver ailments that will last the rest of a person’s life.