Habitat: Conifer forests

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.

Cap: 3.5-10 cm wide, rounded-conic when young, becoming broadly convex to nearly plane at maturity; surface moist to tacky, densely matted-fibrillose to squamulose at the center, becoming glabrous or with scattered minute squamules toward the margin, occasionally virgate in places, often rugulose when mature; dark slate-gray overall when young, becoming medium dark gray with a lighter gray margin, finally dingy brownish gray; margin decurved to straight, frequently wavy occasionally lobed. Flesh; white to very light gray; odor and taste strongly farinaceous. Gills: deeply adnexed at first, becoming sinuate at maturity, close to subdistant; white or occasionally light gray, sometimes discoloring blackish on the edges; entire or often eroded. Stalk: 7.5 cm long, 1-3 cm thick, equal to slightly cavate, often twisted or best, with a rounded or abruptly tapered base, solid or hollow; surface silky-fibrillose; white, often with blackish squamules over the upper half or near the apex, not discoloring when handled, becoming dingy buff in age.

Sources: Bessette, Alan E., Arleen R. Bessette, William C. Roody, and Steven A. Trudell. Trichoolomas of North America. Austin, University of Texan Press, 2013. Trudell, Steve and Joe Ammirati. Mushrooms of the Pacific Northwest. Portland, Timber Press, Inc. 2009.