Bitter Iodine Polypore
Jahnoporus hirtus · Family Dacryobolaceae · Updated October 2026
114US records
9states
Octbusiest month
114 US records since 1892 (69 in the last 10 years)
Last seen Jan 4, 2026 (about 10 months ago) near Brinnon, Kitsap County, WA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Washington, California and Oregon, and the busiest months are Oct, Nov and Sep. (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: Oct, Nov, Sep.
Where it's recorded
Top counties
- Lane County, OR (12) · latest Nov 9, 2025
- Humboldt County, CA (11) · latest Jan 18, 2025
- King County, WA (9) · latest Oct 4, 1996
- Mendocino County, CA (8) · latest Dec 22, 2025
- Whatcom County, WA (7) · latest Nov 19, 2024
- Mason County, WA (6) · latest Dec 11, 2025
- Sonoma County, CA (5) · latest Nov 23, 2023
- Grand County, CO (4) · latest Aug 18, 2021
- Thurston County, WA (4) · latest Oct 18, 2024
- Clallam County, WA (3) · latest Oct 16, 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.