Sulphur Tuft

CorduneanuVlad is right about the greenish colour of H. fasciculare distinguishing it from it's look-alikes. I would however suggest that this is the more common look-alike H. capnoides, because H. sublateritium is said to have a more 'brick red' cap and also it's quite rare. H. capnoides is extremely common and a good match for this.

Here you can see this description http://en.wikipedia.org/wiki/Hypholoma_sublateritium

The way to spot which kind they are is to look at the gills: if they have a greenish color it's H. Fasciculare, if not, it's H. Sublaterium.

I think this is the Brick Cap - Hypholoma sublateritium