The pileus becomes convex, and expanded or nearly flat, and often with an elevation or umbo in the center.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
The color is tawny or light yellowish with intermediate shades, darker on the umbo and becoming darker in age, sometimes umber colored, and stained with black, especially after rains where the spores are washed on the pileus.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
As the cap becomes more expanded the brown surface is torn into scales, which give the cap a more or less shaggy appearance except on the umbo, where the color is more uniform.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson