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Chestnut Mushroom

Pholiota adiposa · Family Strophariaceae · Updated October 2026

221US records

32states

Octbusiest month

221 US records since 1878 (5 in the last 10 years)

Last seen Oct 8, 2024 (about 2 years ago) near Orient, Multnomah County, OR, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from New York, Pennsylvania and Illinois, and the busiest months are Oct, Sep and Nov. (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, Sep, Nov.

Where it's recorded

State	Records	Latest sighting
New York	58	Oct 16, 2016
Pennsylvania	41	Oct 17, 1953
Illinois	22	Oct 15, 1995
Idaho	12	Sep 21, 2024
California	8	Dec 22, 1938
Ohio	7	Nov 25, 1973
Connecticut	7	Oct 20, 1944
Washington	6	Oct 18, 2000
Massachusetts	6	1942-09
Virginia	6	May 31, 1960
Colorado	4	Aug 26, 1997
District of Columbia	4	Nov 9, 1933

Top counties

Tompkins County, NY (27) · latest Oct 1, 1956
Cook County, IL (11) · latest Oct 15, 1995
Centre County, PA (10) · latest Aug 25, 1950
Bonner County, ID (9) · latest Oct 10, 1920
Washington County, NY (8) · latest Sep 28, 1970
Capitol Planning Region, CT (6) · latest Sep 23, 1908
Allegheny County, PA (5) · latest Oct 20, 1951
District of Columbia, DC (4) · latest Nov 9, 1933
Champaign County, IL (4) · latest Oct 17, 1957
Suffolk County, NY (3) · latest Oct 16, 2016

Bring along

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Regional mushroom field guideSee on Amazon

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Folding mushroom knife with brushSee on Amazon

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Wicker foraging basketSee on Amazon

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10x hand lens / loupeSee on Amazon

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Spore print paperSee on Amazon

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