Redwood Rooter
Caulorhiza umbonata · Family unknown · Updated October 2026
394US records
4states
Janbusiest month
394 US records since 1895 (269 in the last 10 years)
Last seen Feb 13, 2026 (about 8 months ago) in Henry Cowell Redwoods State Park, 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 Illinois, and the busiest months are Jan, 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: Jan, Dec, Nov.
Where it's recorded
| State | Records | Latest sighting |
|---|---|---|
| California | 391 | Feb 13, 2026 |
| Washington | 1 | – |
| Illinois | 1 | Aug 24, 1972 |
| Oregon | 1 | Nov 7, 1911 |
Top counties
- Santa Cruz County, CA (82) · latest Feb 13, 2026
- Marin County, CA (74) · latest Dec 11, 2025
- San Mateo County, CA (54) · latest Dec 13, 2025
- Mendocino County, CA (36) · latest Dec 22, 2025
- Sonoma County, CA (30) · latest Jan 13, 2026
- Contra Costa County, CA (30) · latest Feb 16, 2025
- Humboldt County, CA (25) · latest Oct 19, 2025
- Santa Clara County, CA (25) · latest Nov 12, 2025
- Alameda County, CA (23) · latest Feb 9, 2025
- Del Norte County, CA (4) · latest Nov 24, 2024
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.