Tricholoma griseoviolaceum is a mushroom of the agaric genus Tricholoma. It was described as new to science in 1996.
The cap ranges from in diameter; it is purplish gray with a dark center, and brownish gray in age. The stalk is long and 1–2 cm wide.[1] The flesh is whitish gray. The spores are white. The odor and taste resemble cucumbers. Its edibility is unknown.
Similar species include Tricholoma atroviolaceum, T. portentosum, and T. virgatum.