Mushrooms in Winnebago County, Illinois
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.
Too few past records in February here to list species.
Too few past records in March here to list species.
Usually recorded in April here:
Dryad's Saddle Cerioporus squamosus6 April records since 2011
Turkeytail Trametes versicolor6 April records since 2011
Pear-Shaped Puffball Apioperdon pyriforme5 April records since 2011
Common Porecrust, Split Gill Fungus Schizophyllum commune2 April records since 2011
Milk-White Toothed Polypore Irpex lacteus2 April records since 2011
Usually recorded in May here:
- Dryad's Saddle Cerioporus squamosus8 May records since 2011
- Milk-White Toothed Polypore Irpex lacteus2 May records since 2011
Golden Oyster Mushroom Pleurotus citrinopileatus2 May records since 2011
Diamond Polypore Neofavolus alveolaris2 May records since 2011
Usually recorded in June here:
- Golden Oyster Mushroom Pleurotus citrinopileatus10 June records across all years
Byssomerulius incarnatus3 June records across all years
Golden Bracket Fuscoporia gilva2 June records across all years
Crown-Tipped Coral Artomyces pyxidatus2 June records across all years
Usually recorded in July here:
- Golden Oyster Mushroom Pleurotus citrinopileatus5 July records across all years
Hairy Curtain Crust Stereum hirsutum3 July records across all years- Byssomerulius incarnatus3 July records across all years
- Brunneoporus malicola2 July records across all years
Giraffe Spots Peniophora albobadia2 July records across all years
Usually recorded in August here:
- Golden Oyster Mushroom Pleurotus citrinopileatus3 August records across all years
- Acladium curtisii2 August records across all years
Bleeding Fairy Helmet Mycena haematopus2 August records across all years- Crown-Tipped Coral Artomyces pyxidatus2 August records across all years
Usually recorded in September here:
Bay Polypore Picipes badius2 September records since 2011
Usually recorded in October here:
- Serried Porecrust Neoantrodia serialis3 October records across all years
- Pear-Shaped Puffball Apioperdon pyriforme3 October records across all years
Bleeding Oak Crust Stereum gausapatum2 October records across all years
Deadly Galerina Galerina marginata2 October records across all years- Dryad's Saddle Cerioporus squamosus2 October records across all years
Too few past records in November here to list species.
Too few past records in December here to list species.
Most-recorded species
| # | Species | Records |
|---|---|---|
| 1 | 22 | |
| 2 | 20 | |
| 3 | 10 | |
| 4 | 9 | |
| 5 | 6 | |
| 6 | 6 | |
| 7 | 5 | |
| 8 | 4 | |
| 9 | 4 | |
| 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: Jul, Aug, 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.
- 1Aug 14, 2026Bleeding Fairy Helmet Mycena haematopusnear Roscoe, IL (location blurred by the observer) · iNaturalist photo, research grade · original record
- 2
Aug 14, 2026White Cheese Polypore Tyromyces chioneusnear Machesney Park, IL (location blurred by the observer) · iNaturalist photo, research grade · original record - 3Aug 14, 2026Golden Oyster Mushroom Pleurotus citrinopileatusin Rock Cut State Park, IL · iNaturalist photo, research grade · original record
- 4
Jun 28, 2026Pholiota polychroain Kiskwakee Gorge North Forest Preserve, IL · iNaturalist photo, research grade · original record - 5Jun 28, 2026Golden Oyster Mushroom Pleurotus citrinopileatusin Kiskwakee Gorge North Forest Preserve, IL · iNaturalist photo, research grade · original record
- 6
Jun 28, 2026Great Funnel-Veil Amanita Amanita velatipesin Kiskwakee Gorge North Forest Preserve, IL · iNaturalist photo, research grade · original record - 7Jun 28, 2026Byssomerulius incarnatusin Kiskwakee Gorge North Forest Preserve, IL · iNaturalist photo, research grade · original record
- 8
Jun 28, 2026Flat Crep Crepidotus applanatusin Kiskwakee Gorge North Forest Preserve, IL · iNaturalist photo, research grade · original record - 9Jun 28, 2026Byssomerulius incarnatusin Kiskwakee Gorge North Forest Preserve, IL · iNaturalist photo, research grade · original record
- 10
Jun 28, 2026Fluted Bird's Nest Cyathus striatusin Kiskwakee Gorge North Forest Preserve, IL · iNaturalist photo, research grade · original record
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How we built this page
190 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 28 CC0 and 162 CC BY 4.0. See about the data for the full citation.