Giant Elm Bracket
Rigidoporus ulmarius · Family Meripilaceae · Updated October 2026
76US records
11states
Augbusiest month
76 US records since 1883 (1 in the last 10 years)
Last seen Apr 9, 2022 (about 5 years ago) near Manhattan, Riley County, KS, a preserved specimen in Denver Botanic Gardens, Sam Mitchel Herbarium of Fungi. Most US records come from Florida, Louisiana and New Jersey, and the busiest months are Aug, Oct and Jan. (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, Oct, Jan.
Where it's recorded
Top counties
- Alachua County, FL (26) · latest Aug 31, 1969
- Marion County, FL (8) · latest Sep 27, 1941
- Duval County, FL (5) · latest Jan 3, 1947
- Mercer County, NJ (4)
- Jefferson Parish, LA (4) · latest Feb 7, 1958
- Hawaii County, HI (3) · latest Apr 2, 1983
- Bexar County, TX (2) · latest Sep 28, 1920
- Putnam County, FL (2) · latest Aug 15, 1913
- Pointe Coupee Parish, LA (2) · latest Nov 5, 1984
- Orange County, NC (2) · latest May 6, 1933
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.