Cortinarius argentatus
Family Cortinariaceae · Updated October 2026
37US records
14states
Augbusiest month
37 US records since 1901 (0 in the last 10 years)
Last seen Oct 26, 2013 (about 13 years ago) near Townsend, Blount County, TN, a preserved specimen in University of Tennessee Fungal Herbarium. Most US records come from North Carolina, Tennessee and Michigan, and the busiest months are Aug, Sep and Jul. (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: Aug, Sep, Jul.
Where it's recorded
Top counties
- Macon County, NC (7) · latest 1964-08
- Blount County, TN (6) · latest Oct 26, 2013
- Emmet County, MI (2) · latest Jul 25, 1968
- Fairbanks North Star Borough, AK (2) · latest Aug 12, 2006
- Sauk County, WI (1) · latest Aug 20, 1907
- Albany County, WY (1) · latest Aug 2, 1938
- San Mateo County, CA (1) · latest Apr 3, 1961
- Cheboygan County, MI (1) · latest Jun 29, 1951
- Tom Green County, TX (1) · latest Jul 1, 1975
- Alachua County, FL (1) · latest Jan 11, 1987
More on this species from GBIF.
Bring along
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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.