Mushrooms in Napa 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 titubans11 January records since 2011
Hairy Curtain Crust Stereum hirsutum9 January records since 2011
Common Porecrust, Split Gill Fungus Schizophyllum commune8 January records since 2011
California Jack O' Lantern Omphalotus olivascens6 January records since 2011
Turkeytail Trametes versicolor4 January records since 2011
Mulch Maids Leratiomyces percevalii4 January records since 2011
Gymnopilus aurantiophyllus3 January records since 2011
Silky Pinkgill Entoloma sericeum3 January records since 2011
Big Sheath Mushroom Volvopluteus gloiocephalus3 January records since 2011
Death Cap Amanita phalloides2 January records since 2011
Slender Pholiota Pholiota spumosa2 January records since 2011
Honey Fungus Armillaria mellea2 January records since 2011
Usually recorded in February here:
- Yellow Fieldcap Bolbitius titubans7 February records since 2011
- Big Sheath Mushroom Volvopluteus gloiocephalus5 February records since 2011
- Mulch Maids Leratiomyces percevalii5 February records since 2011
- Hairy Curtain Crust Stereum hirsutum5 February records since 2011
Dichomitus squalens2 February records since 2011
Hare'Sfoot Inkcap Coprinopsis lagopus2 February records since 2011
Red Edge Brittlestem Psathyrella corrugis2 February records since 2011
Usually recorded in March here:
- Common Porecrust, Split Gill Fungus Schizophyllum commune4 March records since 2011
- Turkeytail Trametes versicolor4 March records since 2011
- Mulch Maids Leratiomyces percevalii3 March records since 2011
- Hairy Curtain Crust Stereum hirsutum3 March records since 2011
- Fomes arctostaphyli2 March records since 2011
Usually recorded in April here:
- Common Porecrust, Split Gill Fungus Schizophyllum commune6 April records since 2011
- Turkeytail Trametes versicolor3 April records since 2011
Bittersweet Orange Ringless Amanita Amanita velosa2 April records since 2011- California Jack O' Lantern Omphalotus olivascens2 April records since 2011
- Mulch Maids Leratiomyces percevalii2 April records since 2011
Usually recorded in May here:
Pale Brittlestem Candolleomyces candolleanus3 May records since 2011- Common Porecrust, Split Gill Fungus Schizophyllum commune3 May records since 2011
Too few past records in June here to list species.
Usually recorded in July here:
- Turkeytail Trametes versicolor3 July records since 2011
False Parasol Chlorophyllum molybdites2 July records since 2011
Usually recorded in August here:
- Turkeytail Trametes versicolor2 August records since 2011
Usually recorded in September here:
- Sebacina lactescens3 September records across all years
Leucocoprinus leucothites3 September records across all years
Usually recorded in October here:
- Sebacina burtii3 October records across all years
Western Chicken-Of-The-Woods Laetiporus gilbertsonii3 October records across all years
Usually recorded in November here:
- Hairy Curtain Crust Stereum hirsutum8 November records since 2011
- Yellow Fieldcap Bolbitius titubans7 November records since 2011
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii6 November records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune3 November records since 2011
- Big Sheath Mushroom Volvopluteus gloiocephalus3 November records since 2011
- Agaricus incultorum2 November records since 2011
- Turkeytail Trametes versicolor2 November records since 2011
Purple Fuzz Punctularia atropurpurascens2 November records since 2011
Golden Milk Cap Lactarius alnicola2 November records since 2011
Usually recorded in December here:
- Hairy Curtain Crust Stereum hirsutum9 December records since 2011
- Death Cap Amanita phalloides9 December records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune6 December records since 2011
- Turkeytail Trametes versicolor6 December records since 2011
- California Jack O' Lantern Omphalotus olivascens5 December records since 2011
- Yellow Fieldcap Bolbitius titubans5 December records since 2011
Crystal Brain Fungus Myxarium nucleatum5 December records since 2011- Golden Milk Cap Lactarius alnicola4 December records since 2011
Scurfy Twiglet Tubaria furfuracea3 December records since 2011
Deer Mushroom Pluteus cervinus2 December records since 2011
Cabbage Parachute Gymnopus brassicolens2 December records since 2011
Miller's Oysterling Clitopilus hobsonii2 December records since 2011
Most-recorded species
| # | Species | Records |
|---|---|---|
| 1 | 41 | |
| 2 | 36 | |
| 3 | 34 | |
| 4 | 33 | |
| 5 | 31 | |
| 6 | 26 | |
| 7 | 17 | |
| 8 | 16 | |
| 9 | 15 | |
| 10 | 14 | |
| 11 | 12 | |
| 12 | 12 | |
| 13 | 7 | |
| 14 | 7 | |
| 15 | 7 |
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.
- 1
Oct 1, 2026Fatal Dapperling Lepiota subincarnatain Veterans Home Open Space, CA · iNaturalist photo, research grade · original record - 2Sep 24, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniinear American Canyon, CA · iNaturalist photo, research grade · original record
- 3
Jul 27, 2026Golden Bracket Fuscoporia gilvanear Napa, CA · iNaturalist photo, research grade · original record - 4
Jul 24, 2026Pine Bracket Porodaedalea pininear Angwin, CA · iNaturalist photo, research grade · original record - 5Jul 23, 2026Turkeytail Trametes versicolornear Napa, CA · iNaturalist photo, research grade · original record
- 6Jun 5, 2026Common Porecrust, Split Gill Fungus Schizophyllum communenear American Canyon, CA · iNaturalist photo, research grade · original record
- 7
Jun 2, 2026Ceriporia spissain Napa-Sonoma Marshes Wildlife Area, CA · iNaturalist photo, research grade · original record - 8May 15, 2026Common Porecrust, Split Gill Fungus Schizophyllum communenear Napa, CA · iNaturalist photo, research grade · original record
- 9Apr 10, 2026Common Porecrust, Split Gill Fungus Schizophyllum communenear Napa, CA · iNaturalist photo, research grade · original record
- 10Apr 7, 2026Birch Mazegill, Gilled Polypore Lenzites betulinusin Quail Ridge Reserve, CA · iNaturalist photo, research grade · original record
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How we built this page
712 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 338 CC0 and 374 CC BY 4.0. See about the data for the full citation.