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Salty Mushroom

Agaricus bernardii · Family Agaricaceae · Updated October 2026

104US records

8states

Octbusiest month

104 US records since 1940 (48 in the last 10 years)

Last seen Aug 22, 2026 (about 2 months ago) near Highlands Ranch, Douglas County, CO, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Colorado and Pennsylvania, and the busiest months are Oct, Nov and Sep. (Data as of October 26, 2026; records can lag by weeks.)

⚠ Never eat a wild mushroom based on this site. We show where fungi have been recorded, nothing more. We never say any mushroom is edible or safe, and you shouldn't decide that from any website, app or photo. Many deadly mushrooms look like harmless ones. If someone may have eaten a wild mushroom, call Poison Control at 1-800-222-1222 right away.

Lookalike warning. Many mushrooms, including deadly ones, closely resemble each other, and the only reliable identification comes from an expert looking at the actual specimen (often with spore prints or microscopy). Never use a name, photo or record count on this page to decide what something is.

When it's recorded

Records by month, all years. Busiest: Oct, Nov, Sep.

Where it's recorded

State	Records	Latest sighting
California	47	Jan 18, 2026
Colorado	43	Aug 22, 2026
Pennsylvania	5	Oct 23, 2024
Washington	3	Oct 4, 2020
New York	2	Oct 11, 2018
Maryland	2	Oct 19, 1976
West Virginia	1	Sep 20, 2018
Illinois	1	Jul 13, 1940

Top counties

Denver County, CO (24) · latest Jun 7, 2026
San Francisco County, CA (17) · latest Nov 22, 2021
San Mateo County, CA (13) · latest May 1, 2022
Arapahoe County, CO (5) · latest Oct 5, 2022
Boulder County, CO (5) · latest Oct 16, 2022
Monterey County, CA (4) · latest Mar 28, 2012
Alameda County, CA (4) · latest Nov 25, 2020
Armstrong County, PA (3) · latest Oct 17, 2009
El Paso County, CO (3) · latest May 13, 2025
Santa Cruz County, CA (2) · latest Apr 9, 2014

Bring along

🍄

Regional mushroom field guideSee on Amazon

🍄

Folding mushroom knife with brushSee on Amazon

🍄

Wicker foraging basketSee on Amazon

🍄

10x hand lens / loupeSee on Amazon

🍄

Spore print paperSee on Amazon

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