Rhizoctonia anceps
Family Ceratobasidiaceae · Updated October 2026
115US records
6states
Julbusiest month
115 US records since 1889 (0 in the last 10 years)
Last seen Aug 24, 1966 (about 60 years ago) near Spring Green, Iowa County, WI, a preserved specimen in Wisconsin State Herbarium, Fungi. Most US records come from Wisconsin, New York and Washington, and the busiest months are Jul, Jun and Aug. (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: Jul, Jun, Aug.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| Wisconsin | 103 | Aug 24, 1966 |
| New York | 6 | May 18, 1938 |
| Washington | 2 | Jun 22, 1955 |
| Maine | 2 | Aug 27, 1938 |
| Massachusetts | 1 | – |
| New Hampshire | 1 | Jun 27, 1929 |
Top counties
- Vernon County, WI (17) · latest Jun 9, 1960
- Sauk County, WI (14) · latest Jul 8, 1966
- Sawyer County, WI (13) · latest Jul 26, 1964
- Dane County, WI (10) · latest Jun 15, 1960
- Iowa County, WI (7) · latest Aug 24, 1966
- Door County, WI (5) · latest Aug 26, 1929
- Grant County, WI (5) · latest Sep 14, 1923
- Manitowoc County, WI (4) · latest Jul 28, 1917
- Barron County, WI (3) · latest Jul 20, 1928
- Menominee County, WI (3) · latest Jul 15, 1914
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.