Frosty Webcap
Cortinarius hemitrichus · Family Cortinariaceae · Updated October 2026
45US records
11states
Sepbusiest month
45 US records since 1902 (1 in the last 10 years)
Last seen Oct 7, 2023 (about 3 years ago) in Fresno County, CA, a preserved specimen in International Barcode of Life project (iBOL). Most US records come from Washington, North Carolina and Tennessee, 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.
☠ Dangerous genus. The genus Cortinarius includes webcaps containing orellanine. Mushrooms in this group have caused serious or fatal poisonings.
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
Top counties
- Macon County, NC (11) · latest Aug 9, 1996
- Sevier County, TN (4) · latest Sep 7, 1941
- Grays Harbor County, WA (4) · latest Nov 16, 1993
- Pend Oreille County, WA (4) · latest Oct 3, 1998
- Tompkins County, NY (2) · latest Sep 9, 1904
- Snohomish County, WA (2) · latest Sep 27, 2000
- Teton County, WY (2) · latest Aug 7, 1999
- Bronx County, NY (1) · latest Sep 5, 1902
- Fresno County, CA (1) · latest Oct 7, 2023
- Blount County, TN (1) · latest Sep 30, 1951
More on this species from GBIF.
Bring along
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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.