Brown Cubical Rot
Laetiporus conifericola · Family Laetiporaceae · Updated October 2026
274US records
9states
Sepbusiest month
274 US records since 2000 (240 in the last 10 years)
Last seen Sep 18, 2026 (about 5 weeks ago) in Jedediah Smith Redwoods State Park, 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 Sep, Aug and Oct. (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, Aug, Oct.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| California | 88 | Sep 18, 2026 |
| Washington | 78 | Sep 7, 2026 |
| Oregon | 51 | Sep 4, 2026 |
| Alaska | 49 | Aug 22, 2026 |
| Idaho | 3 | Aug 9, 2025 |
| Kansas | 2 | – |
| Arizona | 1 | Aug 24, 2017 |
| Montana | 1 | Oct 2, 2024 |
| Massachusetts | 1 | Sep 27, 2024 |
Top counties
- Humboldt County, CA (14) · latest Sep 13, 2026
- Lane County, OR (13) · latest Nov 12, 2025
- King County, WA (13) · latest Oct 13, 2025
- Jefferson County, WA (12) · latest Aug 19, 2026
- Tulare County, CA (12) · latest Jul 21, 2026
- Snohomish County, WA (11) · latest Sep 7, 2026
- Nevada County, CA (8) · latest Jul 14, 2024
- Kenai Peninsula Borough, AK (8) · latest Aug 11, 2025
- Whatcom County, WA (8) · latest Aug 25, 2022
- Santa Cruz County, CA (7) · latest Nov 9, 2022
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.