Tricholoma inamoenum, also known as the Stinking Tricholoma, is a medium-sized agaric with a distinctive and unpleasant odour that sets it apart from other mushrooms in the Tricholoma genus. This species typically features a smooth, whitish to pale cream cap that can sometimes have a slightly yellowish or pinkish hue. The mushroom is found primarily in coniferous forests. Tricholoma inamoenum grows in mycorrhizal association with various tree species, usually appearing in the late summer to autumn months. While it may not be the most visually striking mushroom, its foul smell, reminiscent of gas or sewage, makes it easily identifiable for those familiar with its characteristics.

Cap convex when young, gradually becoming broadly convex to nearly flat as it matures, often featuring a low, broad umbo. The surface is smooth and dull, starting pale to whitish, and often develops greyish to brownish tints with age. The flesh is white, with a pungent and disagreeable odor, sometimes reminiscent of coal tar or possessing a strong floral scent similar to hyacinths or paperwhites. Gills emarginate to adnexed, ranging from subdistant to distant, broad, white in colour and feature several tiers of shorter gills. Stem nearly equal in width, sometimes slightly enlarging downward to a swollen base that often tapers abruptly at the bottom. It is smooth and dry, with a pruinose (powdery) texture at the apex. The colour ranges from white to cream, with a brownish hue near the base. The stem has no ring. Spore print white.

Tricholoma inamoenum on the mykoweb.com Web site.