Mycena leaiana

Common Name: None.
Description: Cap 1-5 cm across, bell-shaped becoming convex, with center sometimes depressed; bright reddish orange becoming more yellow in age; slimy, shiny, smooth. Stem 30-70 by 1-3 mm high and wide.
Habitat: in dense clusters on deciduous wood. Common. Throughout central and eastern states of North America.
Edible: unknown.

Source: Mushrooms of North America by Roger Phillips.