Inocybe agglutinata
Family Inocybaceae · Updated October 2026
44US records
10states
Novbusiest month
44 US records since 1936 (8 in the last 10 years)
Last seen Oct 21, 2025 (about 12 months ago) near Sudden Valley, Whatcom County, WA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Washington, California and Arizona, and the busiest months are Nov, Oct 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.
☠ Dangerous genus. The genus Inocybe includes fibercaps containing muscarine. Mushrooms in this group have caused serious or fatal poisonings.
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: Nov, Oct, Sep.
Where it's recorded
Top counties
- San Juan County, WA (15) · latest Nov 24, 1972
- Thurston County, WA (3) · latest Oct 24, 1969
- Coconino County, AZ (2) · latest Sep 2, 2023
- Contra Costa County, CA (2) · latest Jan 19, 2022
- Kittitas County, WA (2) · latest Oct 20, 1963
- King County, WA (2) · latest Oct 16, 1997
- Pierce County, WA (2) · latest Nov 4, 1976
- Island County, WA (2) · latest Sep 14, 1976
- Whatcom County, WA (2) · latest Oct 21, 2025
- Fillmore County, MN (1) · latest Sep 22, 2007
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.