Mycena vitilis, commonly known as the snapping bonnet, is a species of inedible mushroom in the family Mycenaceae.

They are distinguished by their long, slender stems that root into the ground, and by the grooved cap that reaches diameters of up to 2.2 cm (0.9 in).

[10] The cap of M. vitilis is initially conic or bell-shaped, but flattens out in maturity, and typically reaches dimensions of up to 2.2 cm (0.9 in).

The cap color is beige (sometimes with a grayish tinge) with paler margins, fading to pale gray or nearly white in age.

[12] The gills are attached by a tooth and are narrowly adnate, close to subdistant, narrow, equal, white or grayish, and with edges concolorous and often slightly eroded.

[12] Smith has noted that in optimal weather conditions, "robust" forms may be found that are "strict and rigid in their appearance.

"[15] The buried portion of the stem is covered with thick, stiff whitish hairs, and is surrounded with a thin subgelatinous layer, which causes it to be slimy to the touch.

The subhymenium (the tissue layer directly underneath the hymenium) is made of narrow, interwoven hyphae, with the central portion composed of long, cylindrical, and moderately broad cells.

The flesh of the cap has a fairly thick subgelatinous pellicle, a well-differentiated hypoderm, and a filamentous tramal body.

In eastern North America it is quite commonly found growing in the autumn months of October and November with M. semivestipes and M. pullata.