Star-Capped Coprinus
Coprinus calyptratus · Family Agaricaceae · Updated October 2026
40US records
6states
Aprbusiest month
40 US records since 1895 (37 in the last 10 years)
Last seen Aug 31, 2026 (about 8 weeks ago) near North Platte, Lincoln County, NE, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Texas and Arizona, and the busiest months are Apr, May and Mar. (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: Apr, May, Mar.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| California | 29 | Nov 30, 2025 |
| Texas | 5 | Apr 27, 2026 |
| Arizona | 3 | Apr 21, 2023 |
| Nebraska | 1 | Aug 31, 2026 |
| New Mexico | 1 | Sep 23, 2024 |
| Kansas | 1 | Jun 7, 2026 |
Top counties
- Sonoma County, CA (4) · latest May 7, 2025
- Alameda County, CA (3) · latest Apr 1, 2025
- San Francisco County, CA (3) · latest Nov 7, 2021
- Los Angeles County, CA (2) · latest Mar 19, 2020
- Contra Costa County, CA (2) · latest Mar 27, 2025
- Yavapai County, AZ (2) · latest Apr 21, 2023
- Monterey County, CA (2) · latest Apr 18, 2024
- Marin County, CA (2) · latest May 18, 2024
- Taylor County, TX (1) · latest May 18, 2024
- Coconino County, AZ (1) · latest Jul 22, 2021
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.