Ivory Bonnet
Atheniella flavoalba · Family Mycenaceae · Updated October 2026
31US records
10states
Augbusiest month
31 US records since 1937 (3 in the last 10 years)
Last seen Dec 9, 2025 (about 11 months ago) in Beer Sheva Park, WA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Washington, Colorado and Michigan, and the busiest months are Aug, Oct and Sep. (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: Aug, Oct, Sep.
Where it's recorded
Top counties
- Chelan County, WA (3) · latest Sep 8, 1997
- Cheboygan County, MI (3) · latest Jul 27, 1957
- Clear Creek County, CO (2) · latest Aug 22, 1974
- Pitkin County, CO (2) · latest Aug 10, 1979
- Grant County, WA (2) · latest Nov 4, 1982
- King County, WA (2) · latest Dec 9, 2025
- North Slope Borough, AK (1) · latest Aug 29, 2020
- Bonner County, ID (1) · latest Jul 5, 1964
- Emmet County, MI (1) · latest 1951-09
- Mendocino County, CA (1) · latest Nov 2, 1975
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.