Agaricus

Agaricus deardorffensis

Under Silk Oak and grape vines in residential yard on Elizabeth Way, Tustin, Orange County, CA. 3/11/16. © Joanne Schwartz.

Family: Agaricaceae

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Mature cap cut to show very light staining.

Mature, persistent, yellow ring/annulus on stem/stipe. Gills stained brown as brown spores have already dropped and stained the gills. Very light staining, if any, on purposely broken base of stem/stipe.

Gills

Cap with brown fibrils on top

Young specimen - Pink gills have not yet been stained by spored dropping.