Mushrooms in Linn County, Iowa
Updated October 2026 · from open GBIF records
572mushroom records
178species recorded
Octbusiest month
572 records since 1891 (523 in the last 10 years)
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.
Usually recorded in January here:
Crowded Parchment Stereum complicatum3 January records since 2011
Usually recorded in February here:
False Turkeytail Stereum lobatum2 February records since 2011- Crowded Parchment Stereum complicatum2 February records since 2011
Too few past records in March here to list species.
Usually recorded in April here:
Turkeytail Trametes versicolor2 April records since 2011
Usually recorded in May here:
Golden Oyster Mushroom Pleurotus citrinopileatus10 May records since 2011
Dryad's Saddle Cerioporus squamosus9 May records since 2011
Deer-Colored Trametes Trametopsis cervina3 May records since 2011
Pale Oyster Pleurotus pulmonarius2 May records since 2011
Protohydnum album2 May records since 2011
Usually recorded in June here:
- Golden Oyster Mushroom Pleurotus citrinopileatus7 June records since 2011
Coprinopsis romagnesiana3 June records since 2011- Fungi Pallidohirschioporus biformis3 June records since 2011
Crown-Tipped Coral Artomyces pyxidatus3 June records since 2011
Eastern American Platterful Mushroom Megacollybia rodmanii3 June records since 2011
Mycorrhaphium adustum2 June records since 2011
Giraffe Spots Peniophora albobadia2 June records since 2011- Turkeytail Trametes versicolor2 June records since 2011
Pale Brittlestem Candolleomyces candolleanus2 June records since 2011
Silky Rosegill Volvariella bombycina2 June records since 2011
Bleeding Oak Crust Stereum gausapatum2 June records since 2011
Yellowing Curtain Crust Stereum subtomentosum2 June records since 2011
Usually recorded in July here:
- Golden Oyster Mushroom Pleurotus citrinopileatus4 July records since 2011
Corrugated-Cap Milky Lactarius corrugis3 July records since 2011- False Turkeytail Stereum lobatum3 July records since 2011
Orange Mycena Mycena leaiana3 July records since 2011
Bradley Lactifluus volemus2 July records since 2011
Porphyrellus sordidus2 July records since 2011
Mallocybe unicolor2 July records since 2011- Inocybe neotropicalis2 July records since 2011
- Crowded Parchment Stereum complicatum2 July records since 2011
Golden Bracket Fuscoporia gilva2 July records since 2011
Artist's Bracket Ganoderma applanatum2 July records since 2011- Pale Oyster Pleurotus pulmonarius2 July records since 2011
Usually recorded in August here:
Chicken Of The Woods Laetiporus sulphureus5 August records since 2011
Bleeding Fairy Helmet Mycena haematopus3 August records since 2011
Lumpy Bracket Trametes gibbosa3 August records since 2011
Lactarius subplinthogalus2 August records since 2011
Aniseed Funnel Clitocybe odora2 August records since 2011
Leopard Earthball Scleroderma areolatum2 August records since 2011- Crowded Parchment Stereum complicatum2 August records since 2011
- Bleeding Oak Crust Stereum gausapatum2 August records since 2011
- False Turkeytail Stereum lobatum2 August records since 2011
Usually recorded in September here:
Lactarius psammicola3 September records since 2011
Clitocybula oculus3 September records since 2011
Foetid Parachute Gymnopus foetidus3 September records since 2011
Celandine Milkcap Lactarius chelidonium3 September records since 2011- Crowded Parchment Stereum complicatum3 September records since 2011
Late Fall Polypore Ischnoderma resinosum3 September records since 2011- Golden Oyster Mushroom Pleurotus citrinopileatus3 September records since 2011
Inkstain Bolete Cyanoboletus pulverulentus2 September records since 2011
Cyanoboletus cyaneitinctus2 September records since 2011
American Slippery Jack Suillus americanus2 September records since 2011- Bradley Lactifluus volemus2 September records since 2011
Pear-Shaped Puffball Apioperdon pyriforme2 September records since 2011
Usually recorded in October here:
- Dryad's Saddle Cerioporus squamosus8 October records since 2011
- Pear-Shaped Puffball Apioperdon pyriforme6 October records since 2011
- Late Fall Polypore Ischnoderma resinosum5 October records since 2011
- Fungi Pallidohirschioporus biformis5 October records since 2011
Deadly Galerina Galerina marginata4 October records since 2011- Crowded Parchment Stereum complicatum4 October records since 2011
- Artist's Bracket Ganoderma applanatum4 October records since 2011
Brown Goblet Arrhenia epichysium3 October records since 2011
Bitter Oysterling Panellus stipticus3 October records since 2011
Oyster Mushroom Pleurotus ostreatus3 October records since 2011
Deer Mushroom Pluteus cervinus3 October records since 2011
Bulbous Honey Fungus Armillaria gallica3 October records since 2011
Usually recorded in November here:
Velvet Shank Flammulina velutipes3 November records since 2011- Lumpy Bracket Trametes gibbosa3 November records since 2011
Bay Polypore Picipes badius2 November records since 2011
Oak Curtain Crust Hymenochaete rubiginosa2 November records since 2011- Golden Bracket Fuscoporia gilva2 November records since 2011
- Artist's Bracket Ganoderma applanatum2 November records since 2011
Too few past records in December here to list species.
⚠ Never eat a wild mushroom based on this site. We show where fungi have been recorded, nothing more. We never say any mushroom is edible or safe, and you shouldn't decide that from any website, app or photo. Many deadly mushrooms look like harmless ones. If someone may have eaten a wild mushroom, call Poison Control at 1-800-222-1222 right away.
Most-recorded species
| # | Species | Records |
|---|---|---|
| 1 | 28 | |
| 2 | 25 | |
| 3 | 23 | |
| 4 | 16 | |
| 5 | 12 | |
| 6 | 12 | |
| 7 | 12 | |
| 8 | 11 | |
| 9 | 11 | |
| 10 | 9 | |
| 11 | 9 | |
| 12 | 9 | |
| 13 | 8 | |
| 14 | 8 | |
| 15 | 7 |
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, Jun, Sep.
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.
- 1Sep 6, 2026Pear-Shaped Puffball Apioperdon pyriformenear Bertram, IA · iNaturalist photo, research grade · original record
- 2Jun 19, 2026Protohydnum albumin Palisades-Kepler State Park, IA · iNaturalist photo, research grade · original record
- 3
Jun 19, 2026Mossy Maze Polypore Cerrena unicolorin Palisades-Kepler State Park, IA · iNaturalist photo, research grade · original record - 4May 19, 2026Dryad's Saddle Cerioporus squamosusin Butler Park, IA · iNaturalist photo, research grade · original record
- 5
May 2, 2026Common Porecrust, Split Gill Fungus Schizophyllum communein Wickiup Hill Natural Area, IA · iNaturalist photo, research grade · original record - 6Apr 23, 2026Pear-Shaped Puffball Apioperdon pyriformenear Marion, IA · iNaturalist photo, research grade · original record
- 7Apr 17, 2026Dryad's Saddle Cerioporus squamosusnear Cedar Rapids, IA · iNaturalist photo, research grade · original record
- 8Sep 27, 2025Deer-Colored Trametes Trametopsis cervinanear Central City, IA · iNaturalist photo, research grade · original record
- 9Sep 6, 2025Cyanoboletus cyaneitinctusin Wickiup Hill Natural Area, IA · iNaturalist photo, research grade · original record
- 10Aug 30, 2025Bitter Oysterling Panellus stipticusin Palisades-Kepler State Park, IA · iNaturalist photo, research grade · original record
Many sightings are on private land. Always get the landowner's permission, and follow the rules of parks and forests, which often limit or ban collecting.
Bring along
🍄
Regional mushroom field guideSee on Amazon🍄
Folding mushroom knife with brushSee on Amazon🍄
Wicker foraging basketSee on Amazon🍄
10x hand lens / loupeSee on Amazon🍄
Spore print paperSee on AmazonAs an Amazon Associate we earn from qualifying purchases.
How we built this page
572 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 26 CC0 and 546 CC BY 4.0. See about the data for the full citation.