Blueing Fishy Fiberhead
Inosperma maximum · Family Inocybaceae · Updated October 2026
63US records
4states
Octbusiest month
63 US records since 1940 (15 in the last 10 years)
Last seen Oct 18, 2025 (about 12 months ago) near Forks, Clallam County, WA, a preserved specimen in INSDC Sequences. Most US records come from Washington, California and Oregon, 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 |
|---|---|---|
| Washington | 40 | Oct 18, 2025 |
| California | 18 | Nov 23, 2024 |
| Oregon | 4 | Dec 16, 2020 |
| Wisconsin | 1 | Oct 22, 2013 |
Top counties
- Humboldt County, CA (16) · latest Nov 23, 2024
- Snohomish County, WA (13) · latest Oct 4, 1970
- Thurston County, WA (6) · latest Oct 15, 1973
- Jefferson County, WA (5) · latest Oct 28, 2001
- Whatcom County, WA (4) · latest Nov 22, 1997
- King County, WA (3) · latest Nov 8, 1976
- Lane County, OR (3) · latest Dec 16, 2020
- Clallam County, WA (2) · latest Oct 18, 2025
- Pierce County, WA (2) · latest Oct 10, 2014
- Lewis County, WA (2) · latest Nov 11, 2016
More on this species from GBIF.
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 AmazonAs an Amazon Associate we earn from qualifying purchases.