Ballerina Waxcap
Porpolomopsis calyptriformis · Family Hygrophoraceae · Updated October 2026
65US records
10states
Marbusiest month
65 US records since 1960 (38 in the last 10 years)
Last seen Feb 12, 2026 (about 8 months ago) in El Corte de Madera Creek Open Space Preserve, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, West Virginia and Tennessee, and the busiest months are Mar, Aug and Jul. (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: Mar, Aug, Jul.
Where it's recorded
Top counties
- Humboldt County, CA (19) · latest Mar 19, 2024
- Sevier County, TN (6) · latest Jun 26, 2016
- Marin County, CA (5) · latest Mar 27, 2023
- Santa Cruz County, CA (4) · latest Mar 18, 2024
- San Mateo County, CA (3) · latest Feb 12, 2026
- Randolph County, WV (3) · latest Aug 15, 2003
- Alameda County, CA (2) · latest Mar 19, 2023
- Haywood County, NC (2) · latest Jul 18, 2015
- Dutchess County, NY (2) · latest Jul 20, 2021
- Fayette County, WV (1) · latest Aug 19, 2004
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.