Amanita phalloides ("Death cap")

One of the most toxic mushrooms, this cyclopeptide-containing mushroom is responsible for the majority of human fatalities due to mushroom poisoning because of the life-threatening liver toxicity that it can cause. Note the greenish white cap and large bulbous root. This specimen was mistaken for the edible mushrooms, Caesar's mushroom (Amanita caesara) and straw mushroom (Volvariella volvacea) and was picked in the Finger Lakes Region of New York State.