Mycena albidofusca, "Blister Mycena" (my name), is common on moist forest leaf litter where it grows in groups. Distinguished by the lighter-coloured top of the cap, which looks like a "blister". Cap to 25 mm., conical to convex, brown, translucent-striate, with the distinct pale, flattened umbo; cap margin often lighter in colour, too. Gills close, greyish-brown; spore print white. Stem slender, darker brown. I suspect it's native to Australia. Devilbend Reservoir, Mornington Peninsula, 2008.