Acanthobasidium penicillatum
Family Stereaceae · Updated October 2026
64US records
9states
Octbusiest month
64 US records since 1904 (0 in the last 10 years)
Last seen Oct 1, 2015 (about 11 years ago) in Swain County, NC, a preserved specimen in Aphyllophorales externi. Most US records come from Washington, Oregon and Idaho, and the busiest months are Oct, May and Mar. (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, May, Mar.
Where it's recorded
Top counties
- Bonner County, ID (8) · latest Jun 6, 1964
- Pend Oreille County, WA (6) · latest Oct 16, 2014
- Clackamas County, OR (5) · latest Apr 12, 1932
- Benton County, OR (5) · latest Oct 19, 1937
- Clallam County, WA (5) · latest 1916-04
- Lincoln County, OR (4) · latest Jun 20, 1958
- Del Norte County, CA (4) · latest May 8, 1947
- Pierce County, WA (4) · latest Oct 10, 2014
- Multnomah County, OR (3) · latest Mar 31, 1932
- King County, WA (3) · latest May 10, 2004
More on this species from GBIF.
Bring along
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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.