Does anyone know what the name (either scientific or common) of this mushroom is? We found it in early fall in the old growth wilderness on the western side of the Cascades. We haven't seen it anywhere else, or anything else resembling it. It is known as the mystical unidentified mushroom at this point since I can't seem to identify it anywhere.
The bright yellow ring is preceded by a deep brown colored ring which is much more visible in the top view of the mushroom (see the drawing).