Mushrooms in Jefferson 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.
Too few past records in February here to list species.
Usually recorded in March here:
Crowded Parchment Stereum complicatum7 March records since 2011
Red Tree Brain Fungus Peniophora rufa5 March records since 2011
Common Porecrust, Split Gill Fungus Schizophyllum commune4 March records since 2011
Common Bird's Nest Crucibulum laeve3 March records since 2011
Brown-Toothed Crust Fungus Hydnoporia olivacea3 March records since 2011
Ceramic Parchment Xylobolus frustulatus3 March records since 2011- Poronidulus conchifer3 March records since 2011
Jelly Rot Phlebia tremellosa3 March records since 2011
Diamond Polypore Neofavolus alveolaris2 March records since 2011
Hairy Bracket Trametes hirsuta2 March records since 2011
Usually recorded in April here:
Dryad's Saddle Cerioporus squamosus4 April records since 2011- Ceramic Parchment Xylobolus frustulatus3 April records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune2 April records since 2011
Usually recorded in May here:
- Dryad's Saddle Cerioporus squamosus13 May records since 2011
- Diamond Polypore Neofavolus alveolaris3 May records since 2011
- Common Porecrust, Split Gill Fungus Schizophyllum commune2 May records since 2011
Glistening Ink-Cap Coprinellus micaceus2 May records since 2011
Usually recorded in June here:
Golden Oyster Mushroom Pleurotus citrinopileatus3 June records across all years- Ceratorhiza rhizodes2 June records across all years
Elegant Polypore Cerioporus varius2 June records across all years
Usually recorded in July here:
Golden Bracket Fuscoporia gilva2 July records across all years
Usually recorded in August here:
Bleeding Fairy Helmet Mycena haematopus3 August records since 2011
Crown-Tipped Coral Artomyces pyxidatus3 August records since 2011- Dryad's Saddle Cerioporus squamosus2 August records since 2011
Orange Mycena Mycena leaiana2 August records since 2011
Artist's Bracket Ganoderma applanatum2 August records since 2011
Usually recorded in September here:
Giant Puffball Calvatia gigantea6 September records across all years- Scleroderma flavidum3 September records across all years
Sessile Earthstar Geastrum saccatum3 September records across all years
Ochre Spreading Tooth Steccherinum ochraceum2 September records across all years- Golden Oyster Mushroom Pleurotus citrinopileatus2 September records across all years
Late Fall Polypore Ischnoderma resinosum2 September records across all years
Purple-And-White Deceiver Laccaria ochropurpurea2 September records across all years
Usually recorded in October here:
- Common Bird's Nest Crucibulum laeve2 October records since 2011
Deadly Galerina Galerina marginata2 October records since 2011- Giant Puffball Calvatia gigantea2 October records since 2011
- Boletinus spectabilis2 October records since 2011
Conifer Mazegill Gloeophyllum sepiarium2 October records since 2011
Velvet Shank Flammulina velutipes2 October records since 2011
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 | 11 | |
| 3 | 11 | |
| 4 | 9 | |
| 5 | 8 | |
| 6 | 8 | |
| 7 | 7 | |
| 8 | 6 | |
| 9 | 6 | |
| 10 | 6 | |
| 11 | 5 | |
| 12 | 5 | |
| 13 | 5 | |
| 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: Oct, Mar, 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 9 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
Aug 21, 2026Pick-A-Back Toadstool Asterophora lycoperdoidesnear Sullivan, WI (location blurred by the observer) · iNaturalist photo, research grade · original record - 2
Oct 31, 2025Wood Blewit Lepista nudanear Johnson Creek, WI · iNaturalist photo, research grade · original record - 3Sep 24, 2025Golden Oyster Mushroom Pleurotus citrinopileatusnear Whitewater, WI · iNaturalist photo, research grade · original record
- 4Sep 24, 2025Golden Oyster Mushroom Pleurotus citrinopileatusnear Whitewater, WI · iNaturalist photo, research grade · original record
- 5
Aug 23, 2025Orange-Yellow Marasmius Marasmius strictipesnear Rome, WI (location blurred by the observer) · iNaturalist photo, research grade · original record - 6
Aug 23, 2025Velvet Rollrim Tapinella atrotomentosanear Sullivan, WI (location blurred by the observer) · iNaturalist photo, research grade · original record - 7
Aug 23, 2025Variable Oysterling Crepidotus variabilisnear Palmyra, WI (location blurred by the observer) · iNaturalist photo, research grade · original record - 8
Aug 23, 2025Ivory Coral Ramariopsis kunzeinear Palmyra, WI (location blurred by the observer) · iNaturalist photo, research grade · original record - 9
Aug 22, 2024Eastern Stinkhorn Phallus raveneliinear Lake Ripley, WI · iNaturalist photo, research grade · original record
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How we built this page
299 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 81 CC0 and 218 CC BY 4.0. See about the data for the full citation.