This mushroom is about 1-3cm wide, the widest being when young. At maturity the cup shape expands into a disc. 
It grows on a stem which is no higher than about 1cm.

Black inside and out with paler coloured flesh (in cross section). The inside of the cup is smooth while the outer surface is clearly wrinkled.
Edibility: Unknown,  too small and leathery to be of value!!