Tricholoma terreum

Morphological Features:

Pileus up to over 5 cm in diameter, convex in shape, though eventually flattening with age; initially bearing a slight umbo when young, later tending to become obtusely mamillate or simply flat. The surface is characteristically mouse-grey, darker at the center and fading towards the margin. Cuticle radially fibrillose, appearing very dry and somewhat silky, separable. Margin regular when young, slightly undulate with age.

Lamellae adnexed to sinuate, whitish when young, becoming more greyish with age. They are quite distant from each other, and the edge, which is concolorous, is typically denticulate.

Stipe cylindrical and proportionate to the pileus, white or slightly greyish, solid to fistulose. It bears longitudinally arranged fibrils that are barely noticeable unless examined closely, pruinose in the region closest to the lamellae.

Flesh scant and fragile, white, slightly greyish beneath the cuticle. Odor faintly fungal; taste sweet and slightly farinaceous.

Habitat:

A frequent and abundant species that can, on occasion, form extensive carpets in pine forests. It shows a marked tendency to fruit at the edges of pine stands and in clearings, particularly from mid-October onwards until early winter. It also fruits under other conifers.

Observations:

A well-known edible species widely collected across many regions of Spain; however, it is excessively fragile, causing it to deteriorate rapidly and necessitating consumption shortly after collection. In the same areas, Tricholoma scalpturatum also occurs, an edible species with a paler pileus and lamellae that tend to yellow. Tricholoma virgatum may also fruit in pine forests, but is more conical and pointed, with an unpleasant taste. Tricholoma sciodes, characterized by a darkish lamellar edge, is more typical of broadleaf woodlands.