Calvatia occidentalis
Family Lycoperdaceae · Updated October 2026
47US records
11states
Novbusiest month
47 US records since 1901 (0 in the last 10 years)
Last seen Jun 30, 1931 (about 95 years ago) near Big Creek, Fresno County, CA, a preserved specimen in University of North Carolina at Chapel Hill Herbarium: Fungi. Most US records come from California, Colorado and Massachusetts, and the busiest months are Nov, Jun and Oct. (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, Jun, Oct.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| California | 21 | Jun 30, 1931 |
| Colorado | 7 | Nov 5, 1901 |
| Massachusetts | 5 | – |
| District of Columbia | 3 | – |
| Pennsylvania | 3 | – |
| Washington | 2 | – |
| Texas | 2 | 1907-12 |
| South Dakota | 1 | – |
| Tennessee | 1 | – |
| New Hampshire | 1 | – |
| Minnesota | 1 | – |
Top counties
- Denver County, CO (4) · latest Oct 7, 1901
- Los Angeles County, CA (4) · latest Oct 7, 1916
- District of Columbia, DC (3)
- Barnstable County, MA (3)
- San Francisco County, CA (3)
- El Paso County, CO (2) · latest Nov 5, 1901
- Riverside County, CA (2)
- Spokane County, WA (2)
- Potter County, TX (2) · latest 1907-12
- Napa County, CA (2) · latest Nov 11, 1904
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.