West Coast Reishi
Ganoderma oregonense · Family Polyporaceae · Updated October 2026
321US records
9states
Sepbusiest month
321 US records since 1902 (248 in the last 10 years)
Last seen Oct 2, 2026 (about 3 weeks ago) in Snohomish County, WA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Washington, Oregon and California, and the busiest months are Sep, 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: Sep, Oct, Aug.
Where it's recorded
Top counties
- Lincoln County, OR (29) · latest Aug 7, 2026
- Grays Harbor County, WA (26) · latest Apr 20, 2025
- Clallam County, WA (20) · latest Oct 17, 2025
- Jefferson County, WA (18) · latest Jul 25, 2026
- Humboldt County, CA (16) · latest Jul 16, 2025
- Lane County, OR (14) · latest Aug 4, 2026
- Benton County, OR (12) · latest Sep 14, 2024
- Clatsop County, OR (11) · latest Aug 15, 2022
- Mason County, WA (11) · latest Aug 23, 2026
- Klamath County, OR (11) · latest Sep 13, 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.