Mycena inclinata , commonly known as the clustered bonnet or the oak @-@ stump bonnet cap , is a species of mushroom in the family Mycenaceae . The doubtfully edible mushroom has a reddish @-@ brown bell @-@ shaped cap up to 4 @.@ 5 cm ( 1 @.@ 8 in ) in diameter . The thin stem is up to 9 cm ( 3 @.@ 5 in ) tall , whitish to yellow @-@ brown at the top but progressively becoming reddish @-@ brown towards the base in maturity , where they are covered by a yellowish mycelium that can be up to a third of the length of the stem . The gills are pale brown to pinkish , and the spore print is white . It is a widespread saprobic fungus , and has been found in Europe , North Africa , Asia , Australasia , and North America , where it grows in small groups or tufts on fallen logs and stumps , especially of oak . British mycologist E.J.H. Corner has described two varieties of the mushroom from Borneo . Lookalike species with which M. inclinata may be confused include M. galericulata and M. maculata .