Western Gilled Bolete
Phylloporus arenicola · Family Boletaceae · Updated October 2026
78US records
6states
Janbusiest month
78 US records since 1977 (67 in the last 10 years)
Last seen Dec 4, 2025 (about 11 months ago) near Santa Cruz, Santa Cruz County, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Washington and Oregon, and the busiest months are Jan, Oct 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: Jan, Oct, Nov.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| California | 50 | Dec 4, 2025 |
| Washington | 13 | Jun 5, 2025 |
| Oregon | 10 | Oct 20, 2024 |
| Arizona | 3 | Aug 24, 2024 |
| Colorado | 1 | Jul 29, 2022 |
| Idaho | 1 | Sep 23, 1983 |
Top counties
- Humboldt County, CA (11) · latest Nov 7, 2023
- Marin County, CA (11) · latest Nov 15, 2025
- Santa Cruz County, CA (10) · latest Dec 4, 2025
- Mendocino County, CA (7) · latest Nov 15, 2025
- Sonoma County, CA (6) · latest Oct 30, 2025
- Del Norte County, CA (3) · latest Dec 31, 2024
- Apache County, AZ (3) · latest Aug 24, 2024
- Whatcom County, WA (3) · latest Oct 19, 2023
- Lewis County, WA (2) · latest Oct 10, 2014
- Thurston County, WA (2) · latest May 11, 2025
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.