Coprinopsis atramentaria - Hat diameter 30-100 mm, 30-80 mm high; initially ovoid, cylindrical, later bell-shaped, with age almost completely unfolded, folded in old age, with a torn edge. Naked, longitudinally fluted surface, sometimes scaly. Gray-gray, gray-brown with a darker center. After ripening it dissolves.

Lamellae very dense, slow, with a flaky blade; young gray, later pink-black, black-brown, old black, melting away.

Stem 50-150 mm high, 5-15 mm thick; cylindrical, naked, smooth, whitish, slightly shiny, full when young, then empty; at the bottom clearly thickened, with a narrow, annular fold, visible especially in juveniles; below the swelling, slightly squamous, the base sharpened.

Thin, fragile, white flesh. Mild taste, almost imperceptible smell.

Occurrence: In deciduous and mixed forests, in parks, gardens, thickets, ruins, dumpsters; usually with cut trunks or on the ground, at the base of the trunks, on buried wood. Grows in clusters, in clusters, bundles; from May to November; common.

Value: Edible mushroom but only young fruiting bodies