Mushrooms in DeKalb 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.
Too few past records in April here to list species.
Too few past records in May here to list species.
Too few past records in June here to list species.
Usually recorded in July here:
Perenniporia ohiensis8 July records across all years
Golden Bracket Fuscoporia gilva6 July records across all years
Milk-White Toothed Polypore Irpex lacteus5 July records across all years- Fungi Pallidohirschioporus biformis5 July records across all years
Elegant Polypore Cerioporus varius4 July records across all years
Cinnamon Bracket Hapalopilus rutilans4 July records across all years
Resinomycena rhododendri4 July records across all years
Leopard Earthball Scleroderma areolatum3 July records across all years
Pholiota polychroa3 July records across all years
Ash Tree Bolete Boletinellus merulioides3 July records across all years
Crepidotus kauffmanii3 July records across all years
Ochre Spreading Tooth Steccherinum ochraceum3 July records across all years
Usually recorded in August here:
- Perenniporia ohiensis5 August records across all years
- Crepidotus kauffmanii4 August records across all years
- Pholiota polychroa3 August records across all years
- Ochre Spreading Tooth Steccherinum ochraceum2 August records across all years
Collybiopsis subnuda2 August records across all years
Saffron Crep Crepidotus crocophyllus2 August records across all years
Usually recorded in September here:
Pancake Crust Perenniporia medulla-panis5 September records across all years
Ceriporiopsis mucida3 September records across all years
Trichaptum subchartaceum2 September records across all years
Usually recorded in October here:
- Fungi Pallidohirschioporus biformis2 October records across all years
Turkeytail Trametes versicolor2 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 | 13 | |
| 2 | 8 | |
| 3 | 8 | |
| 4 | 7 | |
| 5 | 7 | |
| 6 | 6 | |
| 7 | 6 | |
| 8 | 5 | |
| 9 | 5 | |
| 10 | 5 | |
| 11 | 5 | |
| 12 | 4 | |
| 13 | 4 | |
| 14 | 4 | |
| 15 | 4 |
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, 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
Sep 29, 2026Giant Puffball Calvatia giganteain Potawatomi Woods, IL · iNaturalist photo, research grade · original record - 2
Sep 13, 2026Golden Oyster Mushroom Pleurotus citrinopileatusin Prairie Park, IL · iNaturalist photo, research grade · original record - 3
Sep 13, 2026Common Porecrust, Split Gill Fungus Schizophyllum communein Prairie Park, IL · iNaturalist photo, research grade · original record - 4May 12, 2025Golden Oyster Mushroom Pleurotus citrinopileatusin Russell Forest Preserve, IL · iNaturalist photo, research grade · original record
- 5
Jun 10, 2024Dryad's Saddle Cerioporus squamosusnear Genoa, IL · iNaturalist photo, research grade · original record - 6
Oct 7, 2023Lilac Bonnet Mycena purain Shabbona Lake State Park, IL · iNaturalist photo, research grade · original record - 7
Oct 7, 2023Veiled Oyster Pleurotus dryinusin Shabbona Lake State Park, IL · iNaturalist photo, research grade · original record - 8
Oct 7, 2023Fly Agaric Amanita muscariain Shabbona Lake State Park, IL · iNaturalist photo, research grade · original record - 9Sep 24, 2022Fly Agaric Amanita muscariain Shabbona Lake State Park, IL · iNaturalist photo, research grade · original record
- 10
Sep 24, 2022Walnut Mycena Mycena croceain Shabbona Lake State Park, IL · iNaturalist photo, research grade · original record
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How we built this page
210 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 202 CC0 and 8 CC BY 4.0. See about the data for the full citation.