Habitat: Conifer needles
Spores: spores are medium-sized (7--10 x 3--5.5 µm)
Conservation Status: Not of concern
Mycena clavicularis is a common widespread species that often fruits in troops on conifer needles in late summer or early fall with the onset of the rain. The cap is dry to moist or greasy, dark gray to dark brown in the center, and fading somewhat with loss of moisture. The gills are pale grayish or brownish and attached to somewhat decurrent, and the stipe is about the same color as the cap and, in wet weather, is distinctly sticky or slimy, making the mushrooms hard to pick. The spores are medium-sized (7--10 x 3--5.5 µm) and cheilocystidia club-shaped with numerous short, thick, spine-like projections. M. vulgaris (Persoon: Fries) P. Kummer, a similar brownish species that also occurs in large troops on conifer litter, differs by fruiting later in the season, after the onset of colder weather, and by having differently shaped cheilocystidia, much more slender and branched, appearing almost shrub-like.