The pileus is convex to expanded, more or less depressed in the center, the margin involute, and the surface at first floccose, becoming in age floccose scaly, since the surface breaks up into triangular scales more prominent in and near the center, smaller and inconspicuous toward the margin.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
The margin is sometimes free and involute.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
In young plants the margin is strongly involute or inrolled, and a loose but thick veil of interwoven threads extends from the surface of the roll to the stem.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson