Rigidoporus undatus
Family Meripilaceae · Updated October 2026
36US records
12states
Octbusiest month
36 US records since 1902 (2 in the last 10 years)
Last seen Oct 20, 2023 (about 3 years ago) in Chenango Valley State Park, NY, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Pennsylvania, Ohio and New York, and the busiest months are Oct, Aug and Apr. (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: Oct, Aug, Apr.
Where it's recorded
Top counties
- Hamilton County, OH (8) · latest Oct 31, 1935
- Alachua County, FL (3) · latest Apr 8, 1938
- Chautauqua County, NY (3) · latest 1921-08
- Cambria County, PA (2) · latest 1916-08
- Armstrong County, PA (2) · latest 1905-08
- Allegheny County, PA (2) · latest Oct 7, 1907
- Northampton County, PA (2)
- Beaver County, PA (1) · latest Nov 17, 1941
- Westmoreland County, PA (1) · latest 1922-07
- Butler County, OH (1) · latest Sep 30, 1911
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.