Russula mordax
Family Russulaceae · Updated October 2026
191US records
6states
Octbusiest month
191 US records since 1911 (19 in the last 10 years)
Last seen Dec 1, 2024 (about 23 months ago) near Timber Cove, Sonoma County, CA, a preserved specimen in INSDC Sequences. Most US records come from Washington, Oregon and Idaho, 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 |
|---|---|---|
| Washington | 166 | Oct 23, 2021 |
| Oregon | 15 | Nov 2, 2022 |
| Idaho | 4 | Sep 25, 1999 |
| California | 4 | Dec 1, 2024 |
| Montana | 1 | Oct 12, 2019 |
| Wisconsin | 1 | Aug 17, 2019 |
Top counties
- Snohomish County, WA (42) · latest Sep 2, 2007
- Kittitas County, WA (40) · latest Oct 5, 2005
- King County, WA (30) · latest Oct 5, 2005
- Thurston County, WA (15) · latest Nov 2, 2020
- Jefferson County, WA (11) · latest Oct 28, 1996
- Mason County, WA (10) · latest Oct 29, 1988
- Lane County, OR (6) · latest Nov 2, 2022
- Grays Harbor County, WA (5) · latest Oct 21, 1981
- Clackamas County, OR (5) · latest Nov 5, 1988
- Skagit County, WA (4) · latest Oct 22, 2002
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.