The ring is thin, Membranaceous, delicate, sometimes with broad, soft, floccose patches on the under side.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
This gives a fluted appearance to the margin of the pileus, which is very thin and Membranaceous.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
The annulus is superior, that is, near the upper end of the stem, Membranaceous, thin, sometimes tearing, as in A. virosa.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson