Coprinus fimetarius
Family Agaricaceae · Updated October 2026
42US records
11states
Julbusiest month
42 US records since 1890 (0 in the last 10 years)
Last seen Jun 27, 1980 (about 46 years ago) near Seattle, King County, WA, a preserved specimen in University of Washington Herbarium (WTU) - Macrofungi Collection. Most US records come from Washington, New York and Tennessee, and the busiest months are Jul, Jan and May. (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, Jan, May.
Where it's recorded
Top counties
- Knox County, TN (6) · latest Apr 22, 1945
- King County, WA (6) · latest Jun 27, 1980
- Tompkins County, NY (5) · latest Mar 19, 1905
- Orange County, NC (4) · latest Aug 12, 1923
- Centre County, PA (3) · latest Jul 26, 1973
- Marin County, CA (2) · latest Nov 20, 1965
- Armstrong County, PA (1) · latest 1903-07
- Mercer County, NJ (1)
- Los Angeles County, CA (1)
- Genesee County, NY (1) · latest Sep 26, 1948
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.