Ganoderma polychromum
Family Polyporaceae · Updated October 2026
99US records
6states
Julbusiest month
99 US records since 1902 (90 in the last 10 years)
Last seen Jul 18, 2026 (about 3 months ago) near Claremont, Los Angeles 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 District of Columbia, and the busiest months are Jul, Oct and Aug. (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: Jul, Oct, Aug.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| California | 90 | Jul 18, 2026 |
| Washington | 2 | Sep 8, 2018 |
| District of Columbia | 2 | – |
| Arizona | 2 | Jul 29, 2017 |
| Oregon | 2 | Oct 23, 2022 |
| Texas | 1 | Sep 15, 2024 |
Top counties
- Los Angeles County, CA (29) · latest Jul 18, 2026
- San Diego County, CA (15) · latest Oct 4, 2025
- Stanislaus County, CA (11) · latest Jan 21, 2023
- Sonoma County, CA (5) · latest Jan 27, 2024
- Orange County, CA (5) · latest Jul 21, 2021
- Contra Costa County, CA (5) · latest Aug 16, 2021
- Alameda County, CA (4) · latest Aug 2, 2025
- District of Columbia, DC (2)
- San Mateo County, CA (2) · latest Oct 17, 1902
- Pima County, AZ (2) · latest Jul 29, 2017
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.