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Mushrooms in Santa Clara County, California
Updated October 2026 · from open GBIF records
3,309mushroom records
455species recorded
Janbusiest month
3,309 records since 1892 (2,439 in the last 10 years)
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 titubans77 January records since 2011
California Jack O' Lantern Omphalotus olivascens66 January records since 2011
Big Sheath Mushroom Volvopluteus gloiocephalus49 January records since 2011
Turkeytail Trametes versicolor36 January records since 2011
Golden Milk Cap Lactarius alnicola35 January records since 2011
Hairy Curtain Crust Stereum hirsutum32 January records since 2011- Birch Mazegill, Gilled Polypore Lenzites betulinus30 January records since 2011
Wood Blewit Lepista nuda23 January records since 2011
Mulch Maids Leratiomyces percevalii23 January records since 2011
Common Porecrust, Split Gill Fungus Schizophyllum commune16 January records since 2011
Redwood Rooter Caulorhiza umbonata13 January records since 2011
Deadly Galerina Galerina marginata11 January records since 2011
Usually recorded in February here:
- Hairy Curtain Crust Stereum hirsutum31 February records since 2011
- Yellow Fieldcap Bolbitius titubans31 February records since 2011
- California Jack O' Lantern Omphalotus olivascens24 February records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune24 February records since 2011
- Turkeytail Trametes versicolor18 February records since 2011
Bittersweet Orange Ringless Amanita Amanita velosa18 February records since 2011- Mulch Maids Leratiomyces percevalii16 February records since 2011
- Big Sheath Mushroom Volvopluteus gloiocephalus16 February records since 2011
- Wood Blewit Lepista nuda10 February records since 2011
California Golden Chanterelle Cantharellus californicus9 February records since 2011- Birch Mazegill, Gilled Polypore Lenzites betulinus8 February records since 2011
- Golden Milk Cap Lactarius alnicola8 February records since 2011
Usually recorded in March here:
- Bittersweet Orange Ringless Amanita Amanita velosa28 March records since 2011
- Hairy Curtain Crust Stereum hirsutum19 March records since 2011
- California Jack O' Lantern Omphalotus olivascens13 March records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune11 March records since 2011
- Turkeytail Trametes versicolor10 March records since 2011
- Mulch Maids Leratiomyces percevalii8 March records since 2011
- Yellow Fieldcap Bolbitius titubans7 March records since 2011
Pale Brittlestem Candolleomyces candolleanus5 March records since 2011- Birch Mazegill, Gilled Polypore Lenzites betulinus5 March records since 2011
Spring Fieldcap Agrocybe praecox4 March records since 2011
Cryptic Globe Fungus Cryptoporus volvatus3 March records since 2011
Dune Stinkhorn Phallus hadriani3 March records since 2011
Usually recorded in April here:
- Bittersweet Orange Ringless Amanita Amanita velosa12 April records since 2011
- Turkeytail Trametes versicolor10 April records since 2011
- Mulch Maids Leratiomyces percevalii7 April records since 2011
Blushing Bride Amanita novinupta6 April records since 2011
Red Cage Clathrus ruber6 April records since 2011
Mulch Fieldcap Agrocybe putaminum5 April records since 2011- Hairy Curtain Crust Stereum hirsutum5 April records since 2011
- Birch Mazegill, Gilled Polypore Lenzites betulinus4 April records since 2011
Hare'Sfoot Inkcap Coprinopsis lagopus4 April records since 2011
Artist's Conk Ganoderma brownii4 April records since 2011
Sulphur Tuft Hypholoma fasciculare3 April records since 2011- Yellow Fieldcap Bolbitius titubans3 April records since 2011
Usually recorded in May here:
- Turkeytail Trametes versicolor7 May records since 2011
- Artist's Conk Ganoderma brownii6 May records since 2011
- Birch Mazegill, Gilled Polypore Lenzites betulinus4 May records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune3 May records since 2011
- Bittersweet Orange Ringless Amanita Amanita velosa3 May records since 2011
- Mulch Fieldcap Agrocybe putaminum2 May records since 2011
- California Jack O' Lantern Omphalotus olivascens2 May records since 2011
- Hairy Curtain Crust Stereum hirsutum2 May records since 2011
- Pale Brittlestem Candolleomyces candolleanus2 May records since 2011
Petticoat Mottlegill Panaeolus papilionaceus2 May records since 2011
Giraffe Spots Peniophora albobadia2 May records since 2011- Red Cage Clathrus ruber2 May records since 2011
Usually recorded in June here:
- Artist's Conk Ganoderma brownii3 June records since 2011
False Parasol Chlorophyllum molybdites2 June records since 2011- Common Porecrust, Split Gill Fungus Schizophyllum commune2 June records since 2011
- Red Cage Clathrus ruber2 June records since 2011
- Turkeytail Trametes versicolor2 June records since 2011
Usually recorded in July here:
- Red Cage Clathrus ruber5 July records since 2011
- Turkeytail Trametes versicolor4 July records since 2011
Yellow Stainer Agaricus xanthodermus2 July records since 2011- False Parasol Chlorophyllum molybdites2 July records since 2011
- Artist's Conk Ganoderma brownii2 July records since 2011
Usually recorded in August here:
- Turkeytail Trametes versicolor3 August records since 2011
- Cryptic Globe Fungus Cryptoporus volvatus2 August records since 2011
Lantern Stinkhorn Lysurus mokusin2 August records since 2011- False Parasol Chlorophyllum molybdites2 August records since 2011
- Red Cage Clathrus ruber2 August records since 2011
Usually recorded in September here:
Western Chicken-Of-The-Woods Laetiporus gilbertsonii19 September records since 2011
Plantpot Dapperling Leucocoprinus birnbaumii3 September records since 2011
Bohemian Truffle Pisolithus arhizus2 September records since 2011- Common Porecrust, Split Gill Fungus Schizophyllum commune2 September records since 2011
Glistening Ink-Cap Coprinellus micaceus2 September records since 2011- Red Cage Clathrus ruber2 September records since 2011
- Lantern Stinkhorn Lysurus mokusin2 September records since 2011
Usually recorded in October here:
- Western Chicken-Of-The-Woods Laetiporus gilbertsonii13 October records since 2011
- Red Cage Clathrus ruber3 October records since 2011
- Turkeytail Trametes versicolor3 October records since 2011
Alice Eastwood's Bolete Rubroboletus eastwoodiae2 October records since 2011- Artist's Conk Ganoderma brownii2 October records since 2011
Bearded Tooth Hericium erinaceus2 October records since 2011
Usually recorded in November here:
- Hairy Curtain Crust Stereum hirsutum23 November records since 2011
Death Cap Amanita phalloides21 November records since 2011- California Jack O' Lantern Omphalotus olivascens20 November records since 2011
- Yellow Fieldcap Bolbitius titubans17 November records since 2011
Ballen's American Caesar Amanita calyptroderma16 November records since 2011- Golden Milk Cap Lactarius alnicola13 November records since 2011
- Sulphur Tuft Hypholoma fasciculare11 November records since 2011
Honey Fungus Armillaria mellea10 November records since 2011- Western Chicken-Of-The-Woods Laetiporus gilbertsonii7 November records since 2011
- Birch Mazegill, Gilled Polypore Lenzites betulinus7 November records since 2011
- Big Sheath Mushroom Volvopluteus gloiocephalus7 November records since 2011
- Yellow Stainer Agaricus xanthodermus7 November records since 2011
Usually recorded in December here:
- California Jack O' Lantern Omphalotus olivascens53 December records since 2011
- Hairy Curtain Crust Stereum hirsutum30 December records since 2011
- Honey Fungus Armillaria mellea29 December records since 2011
- Yellow Fieldcap Bolbitius titubans27 December records since 2011
- Golden Milk Cap Lactarius alnicola23 December records since 2011
- Death Cap Amanita phalloides21 December records since 2011
Questionable Stropharia Stropharia ambigua17 December records since 2011- Common Porecrust, Split Gill Fungus Schizophyllum commune14 December records since 2011
- Turkeytail Trametes versicolor13 December records since 2011
- Big Sheath Mushroom Volvopluteus gloiocephalus13 December records since 2011
- Sulphur Tuft Hypholoma fasciculare12 December records since 2011
Oyster Mushroom Pleurotus ostreatus9 December records since 2011
⚠ 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.
Most-recorded species
| # | Species | Records |
|---|---|---|
| 1 | 183 | |
| 2 | 166 | |
| 3 | 155 | |
| 4 | 124 | |
| 5 | 93 | |
| 6 | 92 | |
| 7 | 81 | |
| 8 | 68 | |
| 9 | 67 | |
| 10 | 66 | |
| 11 | 60 | |
| 12 | 49 | |
| 13 | 46 | |
| 14 | 45 | |
| 15 | 44 |
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: Jan, Dec, Feb.
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.
- 1Oct 5, 2026Red Cage Clathrus rubernear Sunnyvale, CA · iNaturalist photo, research grade · original record
- 2Sep 23, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniinear San Jose, CA · iNaturalist photo, research grade · original record
- 3Sep 21, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniiin Henry W. Coe State Park, CA · iNaturalist photo, research grade · original record
- 4Sep 21, 2026Western Chicken-Of-The-Woods Laetiporus gilbertsoniinear San Jose, CA · iNaturalist photo, research grade · original record
- 5Sep 18, 2026Common Porecrust, Split Gill Fungus Schizophyllum communenear Saratoga, CA · iNaturalist photo, research grade · original record
- 6Sep 9, 2026Red Cage Clathrus ruberin Charleston Park, CA · iNaturalist photo, research grade · original record
- 7Aug 24, 2026Turkeytail Trametes versicolornear Lexington Hills, CA · iNaturalist photo, research grade · original record
- 8Aug 6, 2026Lantern Stinkhorn Lysurus mokusinin Rengstorff Park, CA · iNaturalist photo, research grade · original record
- 9Jun 20, 2026False Parasol Chlorophyllum molybditesnear San Jose, CA · iNaturalist photo, research grade · original record
- 10Jun 1, 2026False Parasol Chlorophyllum molybditesnear San Jose, CA · iNaturalist photo, research grade · original record
Many sightings are on private land. Always get the landowner's permission, and follow the rules of parks and forests, which often limit or ban collecting.
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.
How we built this page
3,309 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 1,958 CC0 and 1,351 CC BY 4.0. See about the data for the full citation.