Fibroporia vaillantii
Family Fibroporiaceae · Updated October 2026
240US records
35states
Decbusiest month
240 US records since 1859 (1 in the last 10 years)
Last seen Sep 17, 2022 (about 4 years ago) near Ward, Boulder County, CO, a preserved specimen in Denver Botanic Gardens, Sam Mitchel Herbarium of Fungi. Most US records come from New York, Massachusetts and Pennsylvania, and the busiest months are Dec, 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.
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: Dec, Oct, Sep.
Where it's recorded
Top counties
- Norfolk County, MA (14) · latest Nov 5, 1922
- Fayette County, WV (12) · latest Feb 19, 1897
- Chester County, PA (12)
- Orange County, NC (10) · latest Oct 18, 1945
- Hinds County, MS (9) · latest Dec 1, 1914
- Madison Parish, LA (8) · latest Dec 3, 1914
- Gloucester County, NJ (7) · latest 1878
- Los Angeles County, CA (7) · latest 1966-10
- District of Columbia, DC (6) · latest May 6, 1921
- Bonner County, ID (6) · latest Oct 11, 1920
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.