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Mushrooms in Mercer County, New Jersey
Updated October 2026 · from open GBIF records
38,795mushroom records
1,618species recorded
Maybusiest month
38,795 records since 1880 (8,256 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.
Too few past records in January here to list species.
Usually recorded in February here:
Turkeytail Trametes versicolor2 February records since 2011
Usually recorded in March here:
- Turkeytail Trametes versicolor4 March records since 2011
Lumpy Bracket Trametes gibbosa2 March records since 2011
Usually recorded in April here:
Dryad's Saddle Cerioporus squamosus7 April records since 2011- Turkeytail Trametes versicolor3 April records since 2011
Wine Roundhead Stropharia rugosoannulata2 April records since 2011
Usually recorded in May here:
Orange-Gilled Waxycap Humidicutis marginata48 May records since 2011
Funnel Chanterelle Craterellus tubaeformis32 May records since 2011
Snowy Waxcap Cuphophyllus virgineus32 May records since 2011
Heath Waxcap Gliophorus laetus32 May records since 2011
Parrot Mushroom Gliophorus psittacinus32 May records since 2011
Spotted Bolete Xanthoconium affine32 May records since 2011
Spring Polypore Lentinus arcularius25 May records since 2011
Brown-Toothed Crust Fungus Hydnoporia olivacea25 May records since 2011
Salmon-Colored Entoloma Entoloma quadratum25 May records since 2011
Fly Agaric Amanita muscaria24 May records since 2011
American Amidella Amanita volvata24 May records since 2011- Boletus bicolor24 May records since 2011
Too few past records in June here to list species.
Usually recorded in July here:
- Orange-Gilled Waxycap Humidicutis marginata6 July records since 2011
- Funnel Chanterelle Craterellus tubaeformis4 July records since 2011
- Heath Waxcap Gliophorus laetus4 July records since 2011
- Snowy Waxcap Cuphophyllus virgineus4 July records since 2011
- Spotted Bolete Xanthoconium affine4 July records since 2011
- Parrot Mushroom Gliophorus psittacinus4 July records since 2011
- Fly Agaric Amanita muscaria3 July records since 2011
Grisette Amanita vaginata3 July records since 2011
Crested Coral Clavulina coralloides3 July records since 2011- Salmon-Colored Entoloma Entoloma quadratum3 July records since 2011
Lactifluus subvellereus3 July records since 2011
Lactifluus glaucescens3 July records since 2011
Usually recorded in August here:
- Orange-Gilled Waxycap Humidicutis marginata6 August records across all years
- Funnel Chanterelle Craterellus tubaeformis4 August records across all years
- Heath Waxcap Gliophorus laetus4 August records across all years
- Snowy Waxcap Cuphophyllus virgineus4 August records across all years
- Parrot Mushroom Gliophorus psittacinus4 August records across all years
Black Trumpet Craterellus cornucopioides4 August records across all years- Spotted Bolete Xanthoconium affine4 August records across all years
- Fly Agaric Amanita muscaria3 August records across all years
- Boletus bicolor3 August records across all years
Bradley Lactifluus volemus3 August records across all years
Stinky Squid Pseudocolus fusiformis3 August records across all years
Bay Bolete Imleria badia3 August records across all years
Usually recorded in September here:
- Orange-Gilled Waxycap Humidicutis marginata24 September records since 2011
- Parrot Mushroom Gliophorus psittacinus16 September records since 2011
- Heath Waxcap Gliophorus laetus16 September records since 2011
- Funnel Chanterelle Craterellus tubaeformis16 September records since 2011
- Snowy Waxcap Cuphophyllus virgineus16 September records since 2011
- Spotted Bolete Xanthoconium affine16 September records since 2011
- Fly Agaric Amanita muscaria13 September records since 2011
- Boletus bicolor12 September records since 2011
- American Amidella Amanita volvata12 September records since 2011
Clustered Brown Bolete Aureoboletus innixus12 September records since 2011
Parasitic Bolete Pseudoboletus parasiticus12 September records since 2011- White Jelly Fungus Ductifera pululahuana12 September records since 2011
Usually recorded in October here:
- Fly Agaric Amanita muscaria8 October records since 2011
Hen Of The Woods Grifola frondosa4 October records since 2011
Poison Champagne Amanita Amanita crenulata3 October records since 2011
Jack O Lantern Omphalotus illudens3 October records since 2011
Death Cap Amanita phalloides2 October records since 2011
Brown Cubical Rot Of Birch Fomitopsis betulina2 October records since 2011
Usually recorded in November here:
Late Fall Oyster Mushroom Sarcomyxa serotina3 November records across all years
Velvet Shank Flammulina velutipes2 November records across all years
Bearded Tooth Hericium erinaceus2 November records across all years
Pear-Shaped Puffball Apioperdon pyriforme2 November records across all years
Late Fall Polypore Ischnoderma resinosum2 November records across all years
Usually recorded in December here:
Mock Oyster Mushroom Phyllotopsis nidulans3 December records since 2011
False Turkeytail Stereum lobatum2 December records since 2011- Turkeytail Trametes versicolor2 December records since 2011
⚠ 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 | 138 | |
| 2 | 95 | |
| 3 | 94 | |
| 4 | 92 | |
| 5 | 92 | |
| 6 | 92 | |
| 7 | 78 | |
| 8 | 75 | |
| 9 | 75 | |
| 10 | 75 | |
| 11 | 74 | |
| 12 | 73 | |
| 13 | 72 | |
| 14 | 71 | |
| 15 | 71 |
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: May, Sep, Jul.
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
Aug 20, 2026Ringless Honey Mushroom Desarmillaria caespitosanear Princeton, NJ · iNaturalist photo, research grade · original record - 2Aug 20, 2026Ringless Honey Mushroom Desarmillaria caespitosanear Princeton, NJ · iNaturalist photo, research grade · original record
- 3Apr 19, 2026Turkeytail Trametes versicolorin Baldpate Mountain, NJ · iNaturalist photo, research grade · original record
- 4Apr 19, 2026Turkeytail Trametes versicolorin Baldpate Mountain, NJ · iNaturalist photo, research grade · original record
- 5Apr 19, 2026Lumpy Bracket Trametes gibbosain Baldpate Mountain, NJ · iNaturalist photo, research grade · original record
- 6Apr 3, 2026Turkeytail Trametes versicolornear Pennington, NJ · iNaturalist photo, research grade · original record
- 7Nov 7, 2025Pear-Shaped Puffball Apioperdon pyriformein Baldpate Mountain, NJ · iNaturalist photo, research grade · original record
- 8Nov 7, 2025Late Fall Polypore Ischnoderma resinosumnear Titusville, NJ (location blurred by the observer) · iNaturalist photo, research grade · original record
- 9Nov 7, 2025Late Fall Polypore Ischnoderma resinosumin Baldpate Mountain, NJ · iNaturalist photo, research grade · original record
- 10Sep 12, 2025Ringless Honey Mushroom Desarmillaria caespitosanear Princeton, NJ · 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
38,795 records of mushrooms, shelf fungi and polypores (class Agaricomycetes) that fall inside this county's Census boundary. Licenses: 1,689 CC0 and 37,106 CC BY 4.0. See about the data for the full citation.