Mycena erubescens

Description:

Pileus 5-15 mm, hemispherical, conical, campanulate to convex, dry, sulcate, translucent-striate, pruinose, glabrescent, sometimes at first bluish to bluish grey becoming brown, darker in the centre, or dark blackish brown with bluish black centre, fading to pale brown with the centre somewhat darker. Lamellae 15-21 reaching the stipe, ascending, narrowly adnate, occasionally with a short decurrent tooth, white to grey-white or sometimes pale brown, the edge paler, occasionally with red spots. Stipe 10-45 x 0.5-1.5 mm, equal, terete, hollow, straight to curved, pruinose, glabrescent, somewhat cartilaginous, at first greyish brown to brown with bluish apex, then grey-brown to dark brown, exuding a watery-whitish fluid when cut; the base covered with long, white fibrils. Flesh sometimes turning faintly red when cut. Odour indistinctive. Taste very bitter.

Habitat:

Solitary, in small groups or subfasciculate on moss-covered trunks of deciduous trees (Acer, Fagus, Quercus).

Notes:

Spotted in river Homem félinhos beach in a oak tree full of moss I think that is a mycena sp,i have to check furder