Olive Phaeocollybia
Phaeocollybia olivacea · Family Hymenogastraceae · Updated October 2026
50US records
3states
Novbusiest month
50 US records since 1939 (7 in the last 10 years)
Last seen Dec 15, 2024 (about 22 months ago) near Camptonville, Yuba County, CA, a preserved specimen in INSDC Sequences. Most US records come from California, Oregon and Idaho, and the busiest months are Nov, Dec and Oct. (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: Nov, Dec, Oct.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| California | 27 | Dec 15, 2024 |
| Oregon | 22 | Oct 27, 2021 |
| Idaho | 1 | Oct 24, 1971 |
Top counties
- Mendocino County, CA (19) · latest Nov 24, 1992
- Benton County, OR (9) · latest Oct 30, 1997
- Tillamook County, OR (6) · latest 1975-11
- Yuba County, CA (4) · latest Dec 15, 2024
- Clackamas County, OR (4) · latest Nov 28, 1994
- Humboldt County, CA (3) · latest Nov 15, 2013
- Lane County, OR (2) · latest Oct 27, 2021
- El Dorado County, CA (1) · latest Dec 6, 2024
- Crook County, OR (1) · latest Nov 11, 1939
- Kootenai County, ID (1) · latest Oct 24, 1971
More on this species from GBIF.
Bring along
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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.