Obba rivulosa
Family Gelatoporiaceae · Updated October 2026
33US records
12states
Octbusiest month
33 US records since 1915 (3 in the last 10 years)
Last seen Sep 12, 2023 (about 3 years ago) near Timber Cove, Sonoma County, CA, a preserved specimen in International Barcode of Life project (iBOL). Most US records come from Washington, Idaho and California, and the busiest months are Oct, Sep and Aug. (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, Sep, Aug.
Where it's recorded
Top counties
- Clallam County, WA (7) · latest Oct 21, 2014
- Idaho County, ID (4) · latest Sep 13, 1956
- Pend Oreille County, WA (2) · latest Oct 15, 2014
- Lewis County, WA (2) · latest Oct 11, 2014
- Jefferson County, WA (2) · latest Sep 4, 1957
- Collier County, FL (1) · latest Apr 9, 2010
- Santa Cruz County, CA (1) · latest Nov 13, 2018
- Multnomah County, OR (1) · latest Oct 27, 1937
- Cochise County, AZ (1) · latest Sep 5, 1958
- Flathead County, MT (1) · latest Aug 2, 1952
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.