Yellow Fieldcap
Bolbitius titubans · Family Bolbitiaceae · Updated October 2026
1,248US records
43states
Janbusiest month
1,248 US records since 1889 (1,044 in the last 10 years)
Last seen Sep 16, 2026 (about 6 weeks ago) in Kenwood Pkwy, MN, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from California, Oregon and New York, and the busiest months are Jan, Dec and Feb. (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, Feb.
Where it's recorded
Top counties
- Santa Clara County, CA (166) · latest Feb 20, 2026
- San Mateo County, CA (89) · latest Mar 3, 2026
- Marin County, CA (85) · latest Feb 10, 2026
- Alameda County, CA (81) · latest Feb 5, 2026
- San Francisco County, CA (80) · latest Feb 15, 2026
- Sonoma County, CA (80) · latest Feb 26, 2026
- Contra Costa County, CA (70) · latest Jan 19, 2026
- Los Angeles County, CA (60) · latest Feb 15, 2026
- Sacramento County, CA (38) · latest Apr 26, 2026
- Napa County, CA (31) · latest Jan 13, 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.