Thaxterogaster mutabilis
Family Cortinariaceae · Updated October 2026
76US records
8states
Octbusiest month
76 US records since 1947 (0 in the last 10 years)
Last seen Oct 10, 2014 (about 12 years ago) in Lewis County, WA, a preserved specimen in Field Museum of Natural History (Botany) Fungi Collection. Most US records come from Washington, California and Oregon, and the busiest months are Oct, Nov and Sep. (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, Sep.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| Washington | 44 | Oct 10, 2014 |
| California | 13 | Nov 13, 1989 |
| Oregon | 8 | Oct 10, 2002 |
| Idaho | 6 | Sep 6, 2008 |
| Colorado | 2 | Aug 20, 1978 |
| North Carolina | 1 | Aug 27, 1949 |
| Maryland | 1 | Sep 22, 1967 |
| Alaska | 1 | Aug 20, 2014 |
Top counties
- Mendocino County, CA (12) · latest Nov 13, 1989
- Lewis County, WA (12) · latest Oct 10, 2014
- Clallam County, WA (9) · latest Oct 9, 2004
- Coos County, OR (6) · latest Dec 7, 1989
- Valley County, ID (3) · latest Sep 6, 2008
- Pierce County, WA (3) · latest Oct 18, 1995
- Jefferson County, WA (3) · latest Oct 9, 1995
- Kittitas County, WA (3) · latest Oct 3, 1981
- Kitsap County, WA (3) · latest Nov 26, 1999
- Whatcom County, WA (2) · latest Oct 11, 1969
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.