Aphanobasidium filicinum
Family Radulomycetaceae · Updated October 2026
58US records
7states
Julbusiest month
58 US records since 1915 (0 in the last 10 years)
Last seen Jul 11, 1966 (about 60 years ago) near Warner Valley, Shasta County, CA, a preserved specimen in USDA United States National Fungus Collections. Most US records come from Oregon, California and Massachusetts, and the busiest months are Jul, Jun 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: Jul, Jun, Nov.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| Oregon | 45 | Jul 21, 1958 |
| California | 5 | Jul 11, 1966 |
| Massachusetts | 2 | May 25, 1944 |
| Rhode Island | 2 | May 1, 1942 |
| New York | 2 | Sep 6, 1952 |
| Maine | 1 | Nov 11, 1935 |
| Montana | 1 | Sep 20, 1915 |
Top counties
- Josephine County, OR (16) · latest Jul 20, 1958
- Coos County, OR (9) · latest Jun 27, 1958
- Douglas County, OR (4) · latest Jul 20, 1958
- Lane County, OR (4) · latest Jul 6, 1958
- Shasta County, CA (4) · latest Jul 11, 1966
- Washington County, RI (2) · latest May 1, 1942
- Tompkins County, NY (2) · latest Sep 6, 1952
- Linn County, OR (2) · latest Jul 16, 1958
- Deschutes County, OR (2) · latest Jul 16, 1958
- Jefferson County, OR (1) · latest Jul 20, 1958
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.