Leratiomyces riparius
Family Strophariaceae · Updated October 2026
35US records
6states
Junbusiest month
35 US records since 1950 (7 in the last 10 years)
Last seen Apr 21, 2025 (about 18 months ago) near Fruit Heights, Davis County, UT, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Colorado, California and Washington, and the busiest months are Jun, Jul and Aug. (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: Jun, Jul, Aug.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| Colorado | 13 | Aug 14, 2021 |
| California | 7 | Jun 14, 2021 |
| Washington | 6 | 2011-06 |
| Wyoming | 4 | Jul 30, 1994 |
| Utah | 4 | Apr 21, 2025 |
| Arkansas | 1 | Oct 26, 2013 |
Top counties
- Eagle County, CO (4) · latest Jul 29, 2017
- Pitkin County, CO (4) · latest Jul 26, 2017
- Carbon County, WY (3) · latest Jun 30, 1950
- Davis County, UT (3) · latest Apr 21, 2025
- Sierra County, CA (2) · latest Jun 10, 1992
- Santa Cruz County, CA (2) · latest Jan 9, 2010
- Kittitas County, WA (2) · latest 2011-06
- Boulder County, CO (2) · latest Aug 1, 2012
- Grant County, WA (2) · latest Jun 7, 1981
- Placer County, CA (1) · latest Jun 14, 2021
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.