I am not sure to what these actually are. I found them today on the sawn off end of a tree trunk (probably beech). They were tiny indivually, it was the mass that I noticed. They had very thin black stipes I imagine the creamy ones turn pink with age by the look of it.
Apart from some growing on the wood, some are growing on an existing fruiting body, it could be the same as what is growing lower down - it's hard to tell.
Also growing on the wood was Xylaria hypoxylon, Flammulina velutipes, very immature Chondrostereum purpure (I think, it was the right colour) and what you can see in image 3.