Corn-Silk Fiberhead
Pseudosperma sororium · Family Inocybaceae · Updated October 2026
296US records
27states
Octbusiest month
296 US records since 1902 (115 in the last 10 years)
Last seen Sep 5, 2026 (about 7 weeks ago) near Jennerstown, Somerset County, PA, 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 Oct, Sep 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: Oct, Sep, Nov.
Where it's recorded
Top counties
- San Mateo County, CA (19) · latest Dec 2, 2025
- Humboldt County, CA (18) · latest Dec 24, 2022
- San Juan County, WA (18) · latest Sep 25, 1977
- Lane County, OR (15) · latest Nov 21, 2023
- Santa Cruz County, CA (14) · latest Nov 23, 2025
- Marin County, CA (13) · latest Jan 5, 2024
- Pierce County, WA (10) · latest Nov 23, 1960
- Mendocino County, CA (9) · latest Nov 14, 2025
- King County, WA (9) · latest Oct 10, 2014
- Sonoma County, CA (8) · latest May 13, 2026
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.