Hairy Curtain Crust
Stereum hirsutum · Family Stereaceae · Updated October 2026
2,983US records
45states
Novbusiest month
2,983 US records since 1869 (1,283 in the last 10 years)
Last seen Sep 26, 2026 (about 4 weeks ago) in Galbreath Wildlands Preserve, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, New Jersey and Pennsylvania, and the busiest months are Nov, Dec and Jan. (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: Nov, Dec, Jan.
Where it's recorded
Top counties
- Santa Clara County, CA (155) · latest Feb 20, 2026
- Marin County, CA (142) · latest May 16, 2026
- Sonoma County, CA (129) · latest Jul 25, 2026
- San Mateo County, CA (103) · latest Feb 22, 2026
- Contra Costa County, CA (99) · latest Apr 13, 2026
- Santa Cruz County, CA (75) · latest Mar 14, 2026
- Alameda County, CA (71) · latest Jan 16, 2026
- Los Angeles County, CA (66) · latest Nov 28, 2025
- San Diego County, CA (64) · latest Apr 27, 2026
- Benton County, OR (53) · latest Nov 17, 2025
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.