Rhizopogon occidentalis
Family Rhizopogonaceae · Updated October 2026
106US records
11states
Octbusiest month
106 US records since 1899 (23 in the last 10 years)
Last seen Jan 1, 2026 (about 10 months ago) near Livermore, Alameda County, CA, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Washington and Oregon, and the busiest months are Oct, Dec and Nov. (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, Dec, Nov.
Where it's recorded
Top counties
- Klickitat County, WA (15) · latest Sep 23, 1978
- Lincoln County, OR (7) · latest Nov 21, 2004
- Humboldt County, CA (6) · latest Dec 3, 2022
- Spokane County, WA (6) · latest Oct 3, 2022
- Lane County, OR (6) · latest Oct 17, 2020
- Monterey County, CA (5) · latest Jan 23, 1934
- Madera County, CA (4) · latest Feb 14, 1998
- Siskiyou County, CA (4) · latest Oct 16, 1978
- Pacific County, WA (3) · latest Oct 13, 2023
- Alameda County, CA (3) · latest Jan 1, 2026
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.