Oak-Leaf Pinwheel
Collybiopsis quercophila · Family Omphalotaceae · Updated October 2026
178US records
7states
Decbusiest month
178 US records since 1960 (135 in the last 10 years)
Last seen Dec 15, 2025 (about 10 months ago) near Fairfield, Solano County, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Oregon and Ohio, and the busiest months are Dec, Nov and Jan. (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: Dec, Nov, Jan.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| California | 168 | Dec 15, 2025 |
| Oregon | 3 | Nov 9, 2015 |
| Ohio | 2 | Oct 3, 2025 |
| Florida | 2 | Dec 22, 2022 |
| Texas | 1 | Sep 16, 2018 |
| Indiana | 1 | Oct 20, 2020 |
| Pennsylvania | 1 | Dec 3, 2022 |
Top counties
- San Mateo County, CA (29) · latest Nov 19, 2025
- Marin County, CA (26) · latest Dec 14, 2025
- Mendocino County, CA (19) · latest Dec 31, 2021
- Santa Clara County, CA (18) · latest Nov 16, 2025
- Santa Cruz County, CA (17) · latest Oct 2, 2025
- Sonoma County, CA (13) · latest Dec 2, 2025
- Contra Costa County, CA (10) · latest Mar 17, 2025
- Alameda County, CA (9) · latest Nov 26, 2025
- Humboldt County, CA (5) · latest May 14, 2022
- Sacramento County, CA (4) · latest Nov 15, 2024
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.