Crepidotus mollis
Like a small Oyster
However the spore print is dark brown
Oyster spore print is white

The cap is kidney shaped. The cap is white when it is young and when it gets older, it turns ochre. The flesh of the cap is white and can be broken easily. The gills are pale brown and soft. The cap is flabby and has brown spores. The upper layer of the cap is elastic and can be stretched slightly at the margin. The spores are short elliptic and smooth. The spore print is snuff brown. The stalk is rudimentary or lacking.[3] Crepidotus crocophyllus looks similar to this species and is sometimes confused with it.
From Wikipedia -- click Here for more information

Somewhat similar species is Crepidotus crocophyllus is the orange crep Click here for infor on Crepidotus crocophyllus

Col2

kidney shaped

The spore print is dark brown