Mushrooms in Washington County, Oregon
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:
Fragrant Clitocybe Clitocybe fragrans2 January records since 2011
Cat's Tongue Pseudohydnum gelatinosum2 January records since 2011
Western Amethyst Laccaria Laccaria amethysteo-occidentalis2 January records since 2011
Wood Blewit Lepista nuda2 January records since 2011
Silky Pinkgill Entoloma sericeum2 January records since 2011
Wrinkled Club Clavulina rugosa2 January records since 2011
Usually recorded in February here:
Common Porecrust, Split Gill Fungus Schizophyllum commune3 February records since 2011
Turkeytail Trametes versicolor2 February records since 2011- Cat's Tongue Pseudohydnum gelatinosum2 February records since 2011
Usually recorded in March here:
- Turkeytail Trametes versicolor4 March records since 2011
Rosy Conk Rhodofomes cajanderi2 March records since 2011
Northern Red Belt Fomitopsis mounceae2 March records since 2011
Questionable Stropharia Stropharia ambigua2 March records since 2011
Usually recorded in April here:
- Turkeytail Trametes versicolor3 April records since 2011
Lichenomphalia ericetorum2 April records since 2011
Conifer Parasol Chlorophyllum olivieri2 April records since 2011- Northern Red Belt Fomitopsis mounceae2 April records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune2 April records since 2011
Usually recorded in May here:
Western American False Panther Amanita pantherinoides3 May records across all years- Antrodiella incrustans2 May records across all years
Lilac Oysterling Panus conchatus2 May records across all years
Artist's Bracket Ganoderma applanatum2 May records across all years
Too few past records in June here to list species.
Usually recorded in July here:
- Northern Red Belt Fomitopsis mounceae4 July records since 2011
- Artist's Bracket Ganoderma applanatum3 July records since 2011
Too few past records in August here to list species.
Usually recorded in September here:
Bohemian Truffle Pisolithus arhizus2 September records since 2011- Turkeytail Trametes versicolor2 September records since 2011
Oak Mazegill Daedalea quercina2 September records since 2011
Usually recorded in October here:
Fir-Cone Mushroom Strobilurus trullisatus7 October records since 2011- Questionable Stropharia Stropharia ambigua5 October records since 2011
Slippery Jack Suillus luteus4 October records since 2011
Fly Agaric Amanita muscaria4 October records since 2011
Hare'Sfoot Inkcap Coprinopsis lagopus3 October records since 2011
Blushing Rosette Abortiporus biennis3 October records since 2011- Cat's Tongue Pseudohydnum gelatinosum2 October records since 2011
Lawyer's Wig Coprinus comatus2 October records since 2011
Queen Bolete Boletus regineus2 October records since 2011
Scurfy Twiglet Tubaria furfuracea2 October records since 2011
Chip Cherries Leratiomyces ceres2 October records since 2011- Northern Red Belt Fomitopsis mounceae2 October records since 2011
Usually recorded in November here:
- Fly Agaric Amanita muscaria16 November records since 2011
- Questionable Stropharia Stropharia ambigua8 November records since 2011
Blue-Staining Suillus Suillus caerulescens6 November records since 2011- Cat's Tongue Pseudohydnum gelatinosum4 November records since 2011
- Chip Cherries Leratiomyces ceres4 November records since 2011
- Wood Blewit Lepista nuda3 November records since 2011
- Northern Red Belt Fomitopsis mounceae3 November records since 2011
Fluted Bird's Nest Cyathus striatus3 November records since 2011
Cep Boletus edulis2 November records since 2011
Conifer Mazegill Gloeophyllum sepiarium2 November records since 2011
Deceiver Laccaria laccata2 November records since 2011- Fir-Cone Mushroom Strobilurus trullisatus2 November records since 2011
Usually recorded in December here:
- Fly Agaric Amanita muscaria9 December records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune7 December records since 2011
- Cat's Tongue Pseudohydnum gelatinosum4 December records since 2011
Cucumber Cap Macrocystidia cucumis3 December records since 2011
Western Matsutake Tricholoma murrillianum2 December records since 2011
Sulphur Tuft Hypholoma fasciculare2 December records since 2011
Late Fall Oyster Mushroom Sarcomyxa serotina2 December records since 2011
Bitter Brown Leucopax Leucopaxillus gentianeus2 December records since 2011- Conifer Mazegill Gloeophyllum sepiarium2 December records since 2011
Hairy Curtain Crust Stereum hirsutum2 December records since 2011
Most-recorded species
| # | Species | Records |
|---|---|---|
| 1 | 29 | |
| 2 | 17 | |
| 3 | 16 | |
| 4 | 16 | |
| 5 | 15 | |
| 6 | 14 | |
| 7 | 9 | |
| 8 | 8 | |
| 9 | 7 | |
| 10 | 6 | |
| 11 | 6 | |
| 12 | 6 | |
| 13 | 6 | |
| 14 | 6 | |
| 15 | 5 |
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: Nov, Dec, Oct.
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.
- 1Jul 30, 2026Fluted Bird's Nest Cyathus striatusnear Tualatin, OR · iNaturalist photo, research grade · original record
- 2Apr 13, 2026Turkeytail Trametes versicolornear Bethany, OR · iNaturalist photo, research grade · original record
- 3
Apr 6, 2026Jellied Bird's Nest Fungus Nidula candidanear Bethany, OR · iNaturalist photo, research grade · original record - 4Mar 20, 2026Northern Red Belt Fomitopsis mounceaein Tualatin River National Wildlife Refuge, OR · iNaturalist photo, research grade · original record
- 5Mar 19, 2026Turkeytail Trametes versicolornear Beaverton, OR · iNaturalist photo, research grade · original record
- 6Mar 19, 2026Birch Mazegill, Gilled Polypore Lenzites betulinusnear Beaverton, OR · iNaturalist photo, research grade · original record
- 7Mar 19, 2026Turkeytail Trametes versicolornear Beaverton, OR · iNaturalist photo, research grade · original record
- 8Mar 2, 2026Common Porecrust, Split Gill Fungus Schizophyllum communenear Bethany, OR · iNaturalist photo, research grade · original record
- 9Feb 15, 2026Common Porecrust, Split Gill Fungus Schizophyllum communenear Hillsboro, OR · iNaturalist photo, research grade · original record
- 10Feb 15, 2026Turkeytail Trametes versicolornear Hillsboro, OR · iNaturalist photo, research grade · original record
Bring along
As an Amazon Associate we earn from qualifying purchases.
How we built this page
404 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 248 CC0 and 156 CC BY 4.0. See about the data for the full citation.