Agaricus abruptibulbus  

AGARICUS abruptibulbus  Peck is a large white, smoothish, dry, convex to flat mushrm, that bruises yellow.  It has a fragrant anise-almond odor. Persistant pendant ring. Stalk tapers down to small, bulbous base. Free, crowded, narrow gills.  Brown spore print. Agaricus abruptibulbus is edible.

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Agaricus abruptibulbus 

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Agaricus abruptibulbus