Home › Species › Blue Spot Knight

Blue Spot Knight

Tricholoma columbetta · Family Tricholomataceae · Updated October 2026

302US records

26states

Octbusiest month

302 US records since 1898 (95 in the last 10 years)

Last seen Nov 25, 2025 (about 11 months ago) in Hemlocks Bluff Nature Park, NC, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from New Jersey, Pennsylvania and New York, and the busiest months are Oct, Aug and Sep. (Data as of October 26, 2026; records can lag by weeks.)

⚠ 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.

Lookalike warning. Many mushrooms, including deadly ones, closely resemble each other, and the only reliable identification comes from an expert looking at the actual specimen (often with spore prints or microscopy). Never use a name, photo or record count on this page to decide what something is.

When it's recorded

Records by month, all years. Busiest: Oct, Aug, Sep.

Where it's recorded

State	Records	Latest sighting
New Jersey	192	Nov 3, 2019
Pennsylvania	20	2019
New York	11	Oct 31, 2022
North Carolina	9	Nov 25, 2025
Tennessee	8	Oct 16, 2020
Michigan	8	Aug 17, 1953
Texas	7	Dec 28, 2012
Florida	6	Jan 16, 2023
Maryland	6	Oct 23, 2022
West Virginia	4	Aug 13, 2009
Massachusetts	4	Oct 15, 2023
Minnesota	3	Oct 11, 2013

Top counties

Sussex County, NJ (36) · latest Sep 28, 2019
Ocean County, NJ (29) · latest Oct 26, 2019
Mercer County, NJ (23) · latest May 4, 2019
Morris County, NJ (22) · latest Jul 20, 2019
Burlington County, NJ (19) · latest Oct 6, 2018
Hunterdon County, NJ (15) · latest Aug 25, 2019
Monmouth County, NJ (13) · latest Aug 22, 2015
Middlesex County, NJ (12) · latest Aug 18, 2019
Bucks County, PA (11) · latest 2019
Warren County, NJ (11) · latest Jul 28, 2019

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 Amazon

As an Amazon Associate we earn from qualifying purchases.