In the youngest specimens the outline of the bulb and the young convex or nearly globose cap are only seen, and these are covered with the more or less floccose outer veil or volva.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
In some specimens of A. frostiana the spores are quite variable, being nearly globose, ovate to elliptical, approaching the spores of A. muscaria.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson
The pileus is very fleshy, nearly globose, then convex to nearly expanded, smooth, or rarely the surface is broken into minute scales.
"Studies of American Fungi. Mushrooms, Edible, Poisonous, etc."
George Francis Atkinson