Late Fall Oyster Mushroom
Sarcomyxa serotina · Family Sarcomyxaceae · Updated October 2026
1,222US records
32states
Octbusiest month
1,222 US records since 1875 (734 in the last 10 years)
Last seen Oct 4, 2026 (about 3 weeks ago) near West Bend, Washington County, WI, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from New Jersey, Washington and New York, and the busiest months are Oct, Nov and Dec. (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, Dec.
Where it's recorded
Top counties
- King County, WA (54) · latest Jan 13, 2026
- Tompkins County, NY (45) · latest Nov 24, 2025
- Sussex County, NJ (37) · latest Nov 23, 2020
- Whatcom County, WA (35) · latest Jan 13, 2026
- Ocean County, NJ (29) · latest Oct 26, 2019
- Morris County, NJ (28) · latest Dec 8, 2025
- Mercer County, NJ (26) · latest Nov 29, 2021
- Snohomish County, WA (24) · latest Dec 1, 2025
- Chittenden County, VT (21) · latest Oct 2, 2025
- Burlington County, NJ (20) · latest Nov 21, 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.