It is convex, then expanded, the margin first incurved and finally wavy and often somewhat lobed.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
It is often crenate or lobed on the margin, the larger plants showing this character more prominently.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
It is white in color, and the plants are usually considerably smaller, and the pileus is, according to my observations, sometimes more irregular, lobed and wavy on the margin.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson