Caloboletus firmus
Family Boletaceae · Updated October 2026
44US records
12states
Julbusiest month
44 US records since 1935 (28 in the last 10 years)
Last seen Aug 22, 2026 (about 2 months ago) in Cumberland Trail, TN, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from North Carolina, Tennessee and Michigan, and the busiest months are Jul, Aug and Jun. (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: Jul, Aug, Jun.
Where it's recorded
Top counties
- Erie County, NY (4) · latest Aug 8, 2017
- Clarke County, GA (3) · latest Jun 19, 2025
- Chatham County, NC (3) · latest Aug 3, 2024
- Cocke County, TN (2) · latest Jul 14, 2015
- Madison County, AL (2) · latest Jul 20, 2026
- Calvert County, MD (2) · latest Jul 15, 2025
- Montgomery County, TN (2) · latest Aug 3, 2026
- Guilford County, NC (2) · latest Aug 21, 2025
- Oconee County, SC (2) · latest Jul 11, 2022
- Cheboygan County, MI (1) · latest Jul 22, 1968
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.