Resinoporia crassa
Family Fomitopsidaceae · Updated October 2026
41US records
13states
Augbusiest month
41 US records since 1904 (0 in the last 10 years)
Last seen 1980-12 () near Pass Christian, Harrison County, MS, a preserved specimen in University of Washington Herbarium (WTU) - Macrofungi Collection. Most US records come from New York, Pennsylvania and Michigan, 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.
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
- Warren County, NY (5) · latest Sep 2, 1946
- Somerset County, ME (4) · latest Aug 8, 1940
- Grand Traverse County, MI (3) · latest 1909-09
- Del Norte County, CA (2) · latest Feb 1, 1944
- Seminole County, FL (2) · latest Aug 1, 1966
- Ravalli County, MT (2) · latest Sep 24, 1953
- Chippewa County, MI (2) · latest 1909-09
- Knox County, ME (2) · latest Oct 14, 1936
- Missoula County, MT (1) · latest Sep 3, 1913
- Giles County, VA (1) · latest Sep 2, 1936
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.