Bondarzewia occidentalis
Family Bondarzewiaceae · Updated October 2026
50US records
3states
Octbusiest month
50 US records since 2011 (49 in the last 10 years)
Last seen Aug 17, 2026 (about 2 months ago) in Mike Miller County Park, OR, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Washington and Oregon, 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 |
|---|---|---|
| California | 21 | Sep 28, 2025 |
| Washington | 15 | Nov 16, 2025 |
| Oregon | 14 | Aug 17, 2026 |
Top counties
- Humboldt County, CA (13) · latest Sep 24, 2025
- Lane County, OR (6) · latest Oct 19, 2024
- Pierce County, WA (4) · latest Nov 16, 2025
- Mason County, WA (3) · latest Sep 28, 2020
- Lincoln County, OR (3) · latest Aug 17, 2026
- Grays Harbor County, WA (3) · latest Oct 10, 2021
- Jackson County, OR (2) · latest Oct 29, 2020
- Lassen County, CA (2) · latest Jan 16, 2021
- Clallam County, WA (2) · latest Oct 16, 2025
- Thurston County, WA (2) · latest Nov 11, 2022
More on this species from GBIF.
Bring along
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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.