Mushrooms in Winneshiek County, Iowa
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.
Usually recorded in May here:
Dryad's Saddle Cerioporus squamosus9 May records across all years
False Turkey-Tail Stereum ostrea4 May records across all years
Golden Oyster Mushroom Pleurotus citrinopileatus2 May records across all years
Too few past records in June here to list species.
Too few past records in July here to list species.
Usually recorded in August here:
Hairy Parachute Crinipellis scabella11 August records across all years
Tree Bacon Punctularia strigosozonata7 August records across all years
Mycorrhaphium adustum2 August records across all years
Usually recorded in September here:
Mossy Maze Polypore Cerrena unicolor5 September records across all years
Turkeytail Trametes versicolor4 September records across all years- Dryad's Saddle Cerioporus squamosus4 September records across all years
Brown-Toothed Crust Fungus Hydnoporia olivacea3 September records across all years
Hen Of The Woods Grifola frondosa3 September records across all years- Acanthophysium oakesii2 September records across all years
- Poronidulus conchifer2 September records across all years
Northern Cinnabar Polypore Trametes cinnabarina2 September records across all years
Phellinopsis conchata2 September records across all years
Usually recorded in October here:
Dentocorticium portoricense12 October records across all years
Winter Polypore Lentinus brumalis9 October records across all years- Pseudospongipellis unicolor4 October records across all years
Spongipellis unicolor3 October records across all years- Northern Cinnabar Polypore Trametes cinnabarina2 October records across all years
Perenniporia ohiensis2 October records across all years
Silky Parchment Stereum striatum2 October records across all years
Brown Cubical Rot Of Birch Fomitopsis betulina2 October records across all years
Hairy Curtain Crust Stereum hirsutum2 October records across all years
Steccherinum fimbriatum2 October records across all years- Mossy Maze Polypore Cerrena unicolor2 October records across all years
Usually recorded in November here:
- Perenniporia ohiensis3 November records across all years
- Poronidulus conchifer3 November records across all years
Too few past records in December here to list species.
Most-recorded species
| # | Species | Records |
|---|---|---|
| 1 | 23 | |
| 2 | 14 | |
| 3 | 14 | |
| 4 | 12 | |
| 5 | 11 | |
| 6 | 9 | |
| 7 | 8 | |
| 8 | 8 | |
| 9 | 7 | |
| 10 | 7 | |
| 11 | 6 | |
| 12 | 6 | |
| 13 | 5 | |
| 14 | Antrodia conchata | 5 |
| 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: 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
Jul 29, 2026Northern Tooth Climacodon septentrionalisin Upper Iowa River Wildlife Management Area, IA · iNaturalist photo, research grade · original record - 2Jan 8, 2026Turkeytail Trametes versicolorin Bluffton Fir Stand State Preserve, IA · iNaturalist photo, research grade · original record
- 3
Oct 4, 2025Bear's Head Tooth Hericium americanumin Phelps Park, IA · iNaturalist photo, research grade · original record - 4Sep 21, 2025Turkeytail Trametes versicolornear Decorah, IA · iNaturalist photo, research grade · original record
- 5Sep 20, 2025Hen Of The Woods Grifola frondosanear Decorah, IA · iNaturalist photo, research grade · original record
- 6
May 23, 2025Diamond Polypore Neofavolus alveolarisnear Decorah, IA · iNaturalist photo, research grade · original record - 7May 23, 2025Dryad's Saddle Cerioporus squamosusnear Decorah, IA · iNaturalist photo, research grade · original record
- 8
Apr 7, 2025Fluted Bird's Nest Cyathus striatusnear Decorah, IA · iNaturalist photo, research grade · original record - 9Nov 10, 2024Poronidulus conchifernear Decorah, IA · iNaturalist photo, research grade · original record
- 10Nov 8, 2024Poronidulus conchifernear Decorah, IA · iNaturalist photo, research grade · original record
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How we built this page
221 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 217 CC0 and 4 CC BY 4.0. See about the data for the full citation.