Stout Webcap
Cystinarius crassus · Family Cortinariaceae · Updated October 2026
41US records
12states
Augbusiest month
41 US records since 1948 (6 in the last 10 years)
Last seen Aug 16, 2025 (about 14 months ago) near Norton, Wise County, VA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Colorado, Washington and Wyoming, and the busiest months are Aug, Sep 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.
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, Oct.
Where it's recorded
Top counties
- Teton County, WY (5) · latest Aug 16, 1989
- Clear Creek County, CO (3) · latest Aug 10, 2010
- Pitkin County, CO (2) · latest Aug 7, 1979
- Yancey County, NC (2) · latest Sep 19, 2020
- Rich County, UT (2) · latest Sep 7, 1999
- Pierce County, WA (2) · latest Aug 6, 2002
- Chelan County, WA (2) · latest Aug 29, 1989
- Custer County, ID (1) · latest Aug 6, 1962
- Siskiyou County, CA (1) · latest Oct 11, 1990
- Boundary County, ID (1) · latest Sep 4, 1964
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.