Crepidotus applanatus 

This crepidotus frequently plays tricks on people new to wild mushrooming. For a beginner, fresh specimens of Crepidotus applanatus, as long as they have not yet begun to drop their brown spores on top of a close neighbor  attached into the wood in irregular tiers, kind of do look as if they might be Oyster Mushrooms in an immature stage of its fruiting. 

There are differences in their overall size; attachment to wood,their texture, and their spore colors.  It is in the Crepidotaceae family of the Agaricales order.

Crepidotus applanatus02532

Crepidotus applanatus