Poplar Knight
Tricholoma populinum · Family Tricholomataceae · Updated October 2026
47US records
11states
Octbusiest month
47 US records since 1936 (19 in the last 10 years)
Last seen 2021-11 () in Southwick Beach State Park, NY, a preserved specimen in Cornell University Plant Pathology Herbarium. Most US records come from Oregon, Washington and Colorado, and the busiest months are Oct, Nov 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: Oct, Nov, Aug.
Where it's recorded
Top counties
- King County, WA (8) · latest Oct 11, 2008
- Multnomah County, OR (7) · latest Oct 24, 2021
- Columbia County, OR (4) · latest Oct 27, 2016
- Benton County, OR (4) · latest Oct 15, 2018
- Houghton County, MI (2) · latest Oct 19, 1985
- Hood River County, OR (2) · latest Oct 26, 2016
- Snohomish County, WA (2) · latest Oct 31, 2015
- Arapahoe County, CO (2) · latest Nov 12, 1995
- Ravalli County, MT (1) · latest Oct 7, 1982
- Franklin County, MA (1) · latest Oct 10, 1977
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.