of lethal mushroom poisoning in the United States. Volvariella and Amanita cannot be distinguished in the early "button stage", that, for many, is considered the best stage to collect Volvariella for consumption. Like Amanita, the paddy straw mushroom has a volva, or universal veil, so called because it is a membrane that encapsulates the entire mushroom when it is young. This structure breaks apart as the mushroom expands, leaving parts that can be found at the base of the stalk as a cup-like structure.