Amanita thiersii
Family Amanitaceae · Updated October 2026
108US records
23states
Augbusiest month
108 US records since 1955 (39 in the last 10 years)
Last seen Sep 11, 2025 (about 13 months ago) near Manhattan, Riley County, KS, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Illinois, Texas and Oklahoma, and the busiest months are Aug, Sep and Jul. (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 Amanita includes death cap and destroying angels. 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: Aug, Sep, Jul.
Where it's recorded
Top counties
- Jackson County, IL (12) · latest Jul 25, 2001
- Oklahoma County, OK (7) · latest Aug 22, 2001
- Tippecanoe County, IN (5) · latest Jul 21, 2023
- Brazos County, TX (4) · latest Sep 19, 1958
- Douglas County, KS (4) · latest Aug 16, 2025
- Montgomery County, MD (4) · latest Jul 16, 2022
- Kingfisher County, OK (3) · latest Aug 17, 2004
- Jefferson County, KY (3) · latest Aug 2, 2022
- Shawnee County, KS (3) · latest Aug 1, 2025
- Macon County, NC (2) · latest Jul 22, 1986
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.