Xerocomellus mendocinensis
Family Boletaceae · Updated October 2026
64US records
2states
Decbusiest month
64 US records since 1967 (57 in the last 10 years)
Last seen Dec 16, 2025 (about 10 months ago) in Alum Rock, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California and Oregon, 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 | 38 | Dec 16, 2025 |
| Oregon | 26 | Oct 20, 2025 |
Top counties
- Lane County, OR (16) · latest Nov 27, 2024
- Sonoma County, CA (7) · latest Dec 28, 2024
- Marin County, CA (7) · latest Jan 25, 2020
- Santa Cruz County, CA (5) · latest Dec 6, 2025
- Mendocino County, CA (4) · latest Nov 10, 2023
- Benton County, OR (4) · latest Oct 20, 2025
- San Mateo County, CA (3) · latest Dec 13, 2025
- Santa Barbara County, CA (2) · latest Jan 31, 2020
- Linn County, OR (2) · latest Dec 1, 2018
- Multnomah County, OR (2) · latest Nov 18, 2021
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.