Conservation Status: Not of concern
Edibility: The edibility of T. nigrum is unknown, but the odor and taste and reputation of similar species argue against it.
The edibility of T. nigrum is unknown, but the odor and taste and reputation of similar species argue against it.
Tricholoma nigrum is a little-known species, having been described in 1996 from a single collection made along the Oregon coast. Its fruitbodies are medium-sized or larger, and reminiscent of those of T. atroviolaceum, T. atrosquamosum (Chevallier) Saccardo, and T. luteomaculosum A. H. Smith. The cap is moist to somewhat sticky and densely covered with dark gray fibrils and small scales in the center, less so near the edge, the gills whitish to grayish, the stipe whitish, coated with silky fibrils, and sometimes with scattered blackish scales in its upper portion. Microscopically, the key characters are the layer of inflated cells that underlies the cap cuticle and presence of (often inconspicuous) cheilocystidia. The odor and taste are strongly farinaceous. The type collection was made in a shore pine woodland, whereas our collections came from an old-growth, mixed conifer forest dominated by Douglas-fir and western hemlock, with occasional western white pines on nutrient-poor soil.