Tyromyces leucospongius
Family Incrustoporiaceae · Updated October 2026
287US records
11states
Junbusiest month
287 US records since 1884 (66 in the last 10 years)
Last seen Sep 8, 2026 (about 7 weeks ago) near Mount Shasta, Siskiyou County, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Colorado and Wyoming, 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
Top counties
- Siskiyou County, CA (48) · latest Sep 8, 2026
- Fresno County, CA (24) · latest Jun 1, 2024
- Tuolumne County, CA (12) · latest Jul 12, 2026
- Teton County, WY (11) · latest Jul 20, 1986
- Albany County, WY (9) · latest Aug 4, 1970
- Boulder County, CO (9) · latest Jul 28, 2024
- Mono County, CA (8) · latest Jul 30, 2026
- Carbon County, WY (8) · latest Aug 10, 1950
- Cache County, UT (7) · latest May 22, 2012
- San Bernardino County, CA (7) · latest Jun 14, 2024
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.