Horse Mushroom

Agaricus fissuratus

in lawn at residence on Elizabeth Way in Tustin, Orange County, CA. 11/15/2014. © Joanne Schwartz.

Family: Agaricaceae

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Persistent annulus/ring on stem/stipe has caught brown spores which dropped from gills under cap.

Cottony Universal Veil firmly attached to annulus/ring on stem/stipe