It is hollow and stuffed with loose cottony threads, as shown in Fig.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
Base of stem sometimes with white cottony threads, especially in damp situations.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
It is easily recognized by the reddish cottony layer of mycelium threads which cover the entire plant when young, and form a veil which covers the gills at this time.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson