Mycena mustea

Mycena mustea is a species of mushroom in the family Mycenaceae. First described as a new species in 2007, the fungus is known only from Kanagawa, Japan, where it grows on dead fallen twigs in lowland forests. The mushroom's dull violet to grayish-violet cap, initially covered with a fine whitish powder, becomes smooth as it matures, and eventually reaches a diameter of up to 10 mm (0.39 in). The stem is slender, up to 90 mm (3.5 in) long, and is covered with stiff white hairs at the base. Underneath the cap are distantly spaced pale brownish gills that are narrowly attached to the stem. Microscopic characteristics of the mushroom include the weakly amyloid spores (turning bluish to black when stained with Melzer's reagent), the club-shaped cheilocystidia (cystidia on the gill edge) featuring one or more short knob-like protuberances, the absence of pleurocystidia (cystidia on the gill face), the diverticulate cap cuticle hyphae, and the absence of clamp connections. ...read more on Wikipedia.