Mushrooms in Washington County, Wisconsin
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.
Too few past records in January here to list species.
Usually recorded in February here:
Milk-White Toothed Polypore Irpex lacteus2 February records since 2011
Too few past records in March here to list species.
Too few past records in April here to list species.
Usually recorded in May here:
Dryad's Saddle Cerioporus squamosus4 May records across all years
Collared Earthstar Geastrum triplex2 May records across all years
Mossy Maze Polypore Cerrena unicolor2 May records across all years
Usually recorded in June here:
Black Trumpet Craterellus cornucopioides2 June records across all years
Grey Coral Clavulina cinerea2 June records across all years
Usually recorded in July here:
- Black Trumpet Craterellus cornucopioides4 July records across all years
Protohydnum album3 July records across all years
Golden Oyster Mushroom Pleurotus citrinopileatus2 July records across all years
Usually recorded in August here:
Michigan Earthball Scleroderma michiganense5 August records across all years
Crown-Tipped Coral Artomyces pyxidatus4 August records across all years
Usually recorded in September here:
- Scleroderma flavidum11 September records across all years
Leopard Earthball Scleroderma areolatum11 September records across all years- Michigan Earthball Scleroderma michiganense10 September records across all years
Common Earthball Scleroderma citrinum5 September records across all years- Podofomes mollis3 September records across all years
Annosus Root Disease Heterobasidion annosum2 September records across all years
White Coral Jelly Fungus Sebacina sparassoidea2 September records across all years
Usually recorded in October here:
- Scleroderma flavidum6 October records across all years
Spreading Phlebia Phlebia radiata4 October records across all years
Brick Cap Hypholoma lateritium3 October records across all years
Veiled Lady Phallus indusiatus2 October records across all years
Oak Mazegill Daedalea quercina2 October records across all years
Deadly Galerina Galerina marginata2 October records across all years- Stump Puffball Lycoperdon pyriforme2 October records across all years
Jelly Rot Phlebia tremellosa2 October records across all years- Bovista polymorpha2 October records across all years
Artist's Bracket Ganoderma applanatum2 October records across all years- Leopard Earthball Scleroderma areolatum2 October records across all years
- Suillus serotinus2 October records across all years
Too few past records in November here to list species.
Usually recorded in December here:
- Spreading Phlebia Phlebia radiata2 December records since 2011
Bitter Oysterling Panellus stipticus2 December records since 2011
False Turkey-Tail Stereum ostrea2 December records since 2011
Most-recorded species
| # | Species | Records |
|---|---|---|
| 1 | 17 | |
| 2 | 17 | |
| 3 | 15 | |
| 4 | 7 | |
| 5 | 6 | |
| 6 | 6 | |
| 7 | 6 | |
| 8 | 6 | |
| 9 | 6 | |
| 10 | 4 | |
| 11 | 4 | |
| 12 | 3 | |
| 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: Oct, Sep, Aug.
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 4, 2026Late Fall Oyster Mushroom Sarcomyxa serotinanear West Bend, WI · iNaturalist photo, research grade · original record - 2Sep 12, 2026Golden Oyster Mushroom Pleurotus citrinopileatusin Glacial Blue Hills Recreation Area, WI · iNaturalist photo, research grade · original record
- 3
Sep 7, 2026Helvellosebacina concrescensnear Richfield, WI · iNaturalist photo, research grade · original record - 4Sep 7, 2026White Coral Jelly Fungus Sebacina sparassoideanear Richfield, WI · iNaturalist photo, research grade · original record
- 5
Jul 5, 2026Enveloping Crust Sebacina incrustansnear Slinger, WI · iNaturalist photo, research grade · original record - 6
- 7Jul 5, 2026White Coral Jelly Fungus Sebacina sparassoideanear Slinger, WI · iNaturalist photo, research grade · original record
- 8
May 3, 2026Hoof Fungus Fomes fomentariusnear West Bend, WI (location blurred by the observer) · iNaturalist photo, research grade · original record - 9
May 3, 2026Northern Cinnabar Polypore Trametes cinnabarinanear Slinger, WI · iNaturalist photo, research grade · original record - 10Dec 26, 2025Spreading Phlebia Phlebia radiatanear Kewaskum, WI (location blurred by the observer) · iNaturalist photo, research grade · original record
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How we built this page
280 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 204 CC0 and 76 CC BY 4.0. See about the data for the full citation.