Frothy Porecrust
Irpex latemarginatus · Family Irpicaceae · Updated October 2026
240US records
34states
Octbusiest month
240 US records since 1887 (30 in the last 10 years)
Last seen Apr 27, 2026 (about 6 months ago) near Plano, Collin County, TX, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from Ohio, California and Florida, and the busiest months are Oct, Nov 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: Oct, Nov, Sep.
Where it's recorded
Top counties
- Hamilton County, OH (28) · latest Feb 9, 1937
- Alameda County, CA (14) · latest Jan 9, 2025
- Orange County, NC (8) · latest Mar 3, 2001
- Lane County, OR (7) · latest 1958-07
- Sonoma County, CA (7) · latest Dec 27, 2025
- Alachua County, FL (6) · latest Nov 23, 2013
- Grant County, KY (6) · latest Oct 20, 1914
- Lake County, FL (5) · latest Jan 21, 1933
- Riley County, KS (5) · latest Sep 10, 2023
- Benton County, OR (5) · latest Feb 12, 1938
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.