Marasmius cohaerens

The stem's shiny, horny consistency is the most distinctive identifying feature of Marasmius cohaerens. It runs about 5 to 9 centimeters long and up to 0.5 centimeters in diameter, shifting in color from dark brown at the base to whitish near the top, with ochraceous to reddish tones in between. No ring or veil remnant is present.

The cap is matt or slightly felted, measuring roughly 1 to 3.5 centimeters across. Its color ranges from pale brown to yellow brown or chocolate brown, sometimes with a pink tinge, and its shape develops from bell-like (campanulate) in youth to flat with age.

The gills are adnate to almost free, quite distant from one another, and cream to brownish in color with a darker brown edge. Tiny hairs along the gill edge become visible under a hand lens. The taste is mild, with little discernible smell.

Microscopically, the spores are ellipsoid to almond-shaped, measuring around 8 to 10.5 by 4 to 5.5 micrometers. Cheilocystidia take a broadly club-shaped form with finger-like protrusions at the tip, known as "broom cells of the siccus type," a feature shared with Marasmius siccus.

Marasmius cohaerens grows singly or in small groups on humus and litter, most characteristically in beech forests or alongside other deciduous trees, and only occasionally in coniferous woodland. This saprobic habit ties it closely to the decaying organic matter of the forest floor.

The species is widely distributed and fairly common across Europe and eastern Asia. It occurs only rarely in North America, where distinct varieties have been identified separate from the European form, M. cohaerens var. cohaerens.

Observation records suggest the mushroom is encountered mostly in the warmer months, with a pronounced rise from early summer into late summer, tapering off by autumn. This pattern likely reflects when fruiting bodies are most visible and actively sought out, rather than year-round presence.

1. The cheilocystidia of Marasmius cohaerens are called "broom cells of the siccus type," a microscopic feature it shares with the related species Marasmius siccus.
2. Although widespread and fairly common across Europe and eastern Asia, this mushroom is only rarely found in North America, where separate varieties distinct from the European form have been recognized.