The genus Lepiota lacks a volva, but the veil is present forming a ring on the stem. Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.
In the second type the ring is present while the volva is absent, as in the common mushroom, Agaricus campestris, and its close allies; in the genus Lepiota, Armillaria, and others. Studies of American Fungi. Mushrooms, Edible, Poisonous, etc.