Osteina undosa
Family Dacryobolaceae · Updated October 2026
43US records
14states
Augbusiest month
43 US records since 1898 (10 in the last 10 years)
Last seen Feb 21, 2024 (about 3 years ago) near Big Lagoon, Humboldt County, CA, a preserved specimen in International Barcode of Life project (iBOL). Most US records come from Washington, California and New York, and the busiest months are Aug, Sep 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: Aug, Sep, Oct.
Where it's recorded
Top counties
- Humboldt County, CA (6) · latest Feb 21, 2024
- King County, WA (3) · latest Oct 20, 1911
- Sevier County, TN (3) · latest Aug 27, 1983
- Pierce County, WA (3) · latest Jan 19, 2019
- Orange County, NC (2) · latest Oct 20, 1945
- Worcester County, MA (2) · latest Sep 29, 2013
- Cheshire County, NH (2) · latest Oct 15, 1937
- Bonner County, ID (2) · latest 1915-08
- Hamilton County, NY (2) · latest Aug 26, 1902
- Lincoln County, MT (1) · latest Aug 5, 1966
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.