Nitrous Bonnet
This common and widespread species can be found on great variety of substrates, from duff to woodchips to bark to moss-covered logs of many species. The caps reach 1.2 inches and the stipes up to 3 inches. Caps are gray or gray brown and covered with a whitish pruinose coating when young. They are initially conical, but become bell-shaped to conical with or without an umbo. They are sulcate and smooth, with prominent blackish striations in age that correspond to the position of the gills below. The gills are ascending and adnate to notched, gray with a whitish edge and close to subdistant. The stipes are finely pruinose initially but become smooth and gray. They are hollow and very fragile. There is a weak odor of bleach which is accentuated with crushing. Edibility is unknown. Similar species include M. abramsii and M. silvae-nigrae