I found this mushroom growing on or from under an old decayed log in hardwoods. I haven't seen it before and am not sure of it's ID. It is distinct with a bright greenish-yellow cap with black fibers and yellow decurrent gills. The stem is whitish with some striation. The cap is approx. 1" across, stem 2 1/2" tall. So far the closest possibilities that I've found in order of likelihood are: