Having browsed my reference books and online sites, I am at a total loss knowing what this is, though it may turn out to be embarrassingly common.
Found today on the side of an old log in deciduous woodland, a small cluster, with individuals growing to 2cm or more. The specimen photographed and bisected clearly has a stem and offshoots, but no sign of pores or spores.
Any ideas?

[attachment=3]PB230003.JPG[/attachment]

[attachment=2]PB230004.JPG[/attachment]

[attachment=1]PB230007.JPG[/attachment]

[attachment=0]PB230011.JPG[/attachment]