Tricholoma resplendens

Tricholoma resplendens is a fungus of the genus "Tricholoma" native to Europe and North America. It was originally described as "Agaricus resplendens" by Elias Magnus Fries in 1857, and was given its current name by Petter Adolf Karsten in 1876.
The species has no odor, and is part of a group of "Tricholoma" species containing toxins which can cause severe gastrointestinal upset.