American Eastern Yellow Fly Agaric

The range probably fits better with guessowii, the easiest way to separate persicina from the other muscaria is examining the base of stem. To my knowledge persicina is only variety that lacks the well defined concentric zones of volval material. Color is not the best identifying characteristic of fungi, there can be fair amount of deviation within the expected color, and a mushroom this far along could have faded considerably. If you would like to take a stab at identifying your own Amanitacea, this site is an excellent resource, http://www.amanitaceae.org