Lactarius occidentalis
Family Russulaceae · Updated October 2026
53US records
5states
Octbusiest month
53 US records since 1934 (24 in the last 10 years)
Last seen Dec 6, 2024 (about 23 months ago) near Georgetown, El Dorado County, CA, a preserved specimen in INSDC Sequences. Most US records come from California, Washington and Alaska, 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 | 35 | Dec 6, 2024 |
| Washington | 12 | 2012-09 |
| Alaska | 3 | Aug 25, 2016 |
| Oregon | 2 | 2011-10 |
| North Carolina | 1 | Jun 29, 2011 |
Top counties
- Humboldt County, CA (26) · latest Nov 25, 2024
- King County, WA (7) · latest Jul 12, 1998
- Marin County, CA (3) · latest Dec 13, 1981
- Del Norte County, CA (2) · latest Oct 23, 1982
- Jefferson County, WA (2) · latest Oct 21, 2006
- Sierra County, CA (1) · latest Sep 22, 1984
- El Dorado County, CA (1) · latest Dec 6, 2024
- Lincoln County, OR (1) · latest Oct 28, 1978
- Placer County, CA (1) · latest Sep 29, 2023
- Mendocino County, CA (1) · latest Nov 5, 2024
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.