Grooved Bonnet
Mycena polygramma · Family Mycenaceae · Updated October 2026
36US records
11states
Octbusiest month
36 US records since 1890 (0 in the last 10 years)
Last seen May 24, 1992 (about 34 years ago) near Salem, Roanoke County, VA, a preserved specimen in Virginia Tech University, Massey Herbarium - Fungi. Most US records come from New York, North Carolina and Washington, and the busiest months are Oct, Jun and Sep. (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, Jun, Sep.
Where it's recorded
Top counties
- Tompkins County, NY (17) · latest Jun 25, 1917
- Watauga County, NC (3) · latest Aug 19, 1901
- Kitsap County, WA (2) · latest Jan 1, 1934
- New Castle County, DE (2) · latest Oct 9, 1890
- Chippewa County, MI (1) · latest 1909-09
- East Baton Rouge Parish, LA (1) · latest Dec 18, 1955
- Knox County, TN (1) · latest May 22, 1934
- Cattaraugus County, NY (1) · latest Jun 25, 1964
- Hamilton County, OH (1) · latest Oct 21, 1932
- Roanoke County, VA (1) · latest May 24, 1992
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.