Mushrooms in San Joaquin County, California
Fruiting now
Based on past sightings (mostly since 2011; all years where recent records are few), not a forecast. Weather and place matter a lot, and a listing here says nothing about whether a mushroom is safe.
Usually recorded in January here:
Yellow Fieldcap Bolbitius titubans3 January records since 2011
Hairy Curtain Crust Stereum hirsutum2 January records since 2011
Big Sheath Mushroom Volvopluteus gloiocephalus2 January records since 2011
Usually recorded in February here:
Field Bird's Nest Cyathus olla3 February records across all years
Short-Stalked Suillus Suillus brevipes2 February records across all years
Turkeytail Trametes versicolor2 February records across all years- Big Sheath Mushroom Volvopluteus gloiocephalus2 February records across all years
Too few past records in March here to list species.
Usually recorded in April here:
- Hairy Curtain Crust Stereum hirsutum3 April records since 2011
Too few past records in May here to list species.
Too few past records in June here to list species.
Too few past records in July here to list species.
Too few past records in August here to list species.
Usually recorded in September here:
Pisolithus tinctorius2 September records since 2011
Usually recorded in October here:
- Pisolithus tinctorius2 October records since 2011
Fly Agaric Amanita muscaria2 October records since 2011
False Parasol Chlorophyllum molybdites2 October records since 2011
Usually recorded in November here:
Lawyer's Wig Coprinus comatus2 November records since 2011
Brown Roll Rim Paxillus involutus2 November records since 2011
Usually recorded in December here:
- Fly Agaric Amanita muscaria10 December records since 2011
- Lawyer's Wig Coprinus comatus7 December records since 2011
- Turkeytail Trametes versicolor5 December records since 2011
Pale Brittlestem Candolleomyces candolleanus4 December records since 2011- Lilaceophlebia ochraceofulva4 December records since 2011
Wood Blewit Lepista nuda4 December records since 2011
Honey Fungus Armillaria mellea3 December records since 2011
Western Amethyst Laccaria Laccaria amethysteo-occidentalis2 December records since 2011- Yellow Fieldcap Bolbitius titubans2 December records since 2011
- Big Sheath Mushroom Volvopluteus gloiocephalus2 December records since 2011
Most-recorded species
| # | Species | Records |
|---|---|---|
| 1 | 14 | |
| 2 | 10 | |
| 3 | 9 | |
| 4 | 7 | |
| 5 | 6 | |
| 6 | 5 | |
| 7 | 5 | |
| 8 | 5 | |
| 9 | 5 | |
| 10 | Lilaceophlebia ochraceofulva | 4 |
| 11 | 4 | |
| 12 | 4 | |
| 13 | 3 | |
| 14 | 3 | |
| 15 | 3 |
Being on this list doesn't mean a mushroom is common, easy to identify or safe. It only means it has been recorded here often.
Best months to look
Records by month, all years. Busiest: Dec, Jan, Nov.
Sightings map
● Each dot is a place with at least one record (rounded to about 1 km). Locations can be approximate, and many are on private land. Numbered blue circles are recent sightings, shown only to a general area of about 10 km.
Recent sightings
The 10 most recent dated records in this county, newest first. Data as of October 26, 2026. Records can take weeks or more to reach GBIF, so the newest finds may not show yet. Places are given only as a public park or forest (from the USGS Protected Areas Database) or the nearest town, and the numbered circles on the map cover a general area, not an exact spot.
- 1Sep 18, 2026Pale Brittlestem Candolleomyces candolleanusnear Lodi, CA · iNaturalist photo, research grade · original record
- 2
Jul 17, 2026Lantern Stinkhorn Lysurus mokusinnear Lodi, CA · iNaturalist photo, research grade · original record - 3Feb 28, 2026Turkeytail Trametes versicolornear Camanche Village, CA · iNaturalist photo, research grade · original record
- 4Dec 27, 2025Big Sheath Mushroom Volvopluteus gloiocephalusin Oak Grove Regional Park, CA · iNaturalist photo, research grade · original record
- 5Dec 27, 2025Wood Blewit Lepista nudain Oak Grove Regional Park, CA · iNaturalist photo, research grade · original record
- 6Dec 27, 2025Yellow Fieldcap Bolbitius titubansin Oak Grove Regional Park, CA · iNaturalist photo, research grade · original record
- 7
Nov 17, 2025Ganoderma polychromumnear Stockton, CA · iNaturalist photo, research grade · original record - 8
Oct 28, 2025Blushing Rosette Abortiporus biennisnear Stockton, CA · iNaturalist photo, research grade · original record - 9Oct 11, 2025False Parasol Chlorophyllum molybditesnear Lodi, CA · iNaturalist photo, research grade · original record
- 10Oct 7, 2025Pisolithus tinctoriusnear Ripon, CA · iNaturalist photo, research grade · original record
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How we built this page
135 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 5 CC0 and 130 CC BY 4.0. See about the data for the full citation.