Agaricus berryessae
A Californian Agaricus described by Kerrigan in 2016 in his monograph of the genus in California, named for the Lake Berryessa area. Records cluster in California, with a few in Mexico, and it fruits in the cool rainy season.
Where it grows wild
A soil or litter saprotroph of oak woodland and mixed forest; one Los Angeles County sample is labelled forest.
Low to mid elevations in the California Coast Ranges; few records carry an altitude.
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Profiles are drafts built from measured range and climate and from published sources; each section carries its own confidence in the app.