Mycena plumipes, also known as the Plumed Bonnet, is a slender, delicate mushroom often found growing on fallen spruce cones in coniferous forests. Its cap is typically bell-shaped to conical, with a greyish to brownish tint that may appear translucent when moist. It usually appears in small clusters during spring and early summer, especially under moist conditions.

Cap parabolical, ranging from campanulate to conical in shape, often flattening with age and developing a broad umbo. It is sometimes somewhat umbilicate. The surface is smooth, hygrophanous, and glabrous. It is not sulcate and only faintly translucent-striate. The texture is slightly lubricous to the touch. The colour ranges from dark chestnut to sepia brown, becoming paler towards the margin. The flesh is pale, watery, and thin. Gills reaching the stipe and ascending, often ventricose and narrowly adnate to adnate. In older specimens, they are dorsally intervenose. The colour ranges from whitish to pale grey, sometimes turning pink with age. Stem straight to curved, hollow, terete, and equal in width, somewhat firm in texture. The surface is glabrous except for a minutely pruinose apex. Colour is grey-brown overall, whitish above, and dark brown towards the base, which is covered with coarse, long, whitish fibrils. The stem lacks a ring. Spore print white.

Microscopic Features: The spores are measuring 7–9.6 × 3.6–5.8 µm. Shape ranges from pip-shaped to phaseoliform. The surface is smooth and spores are amyloid.

Mycena plumipes on the mycena.no Web site.