Gwen, I think you've got a root there, a spike would be all green. Good luck with the moss, though, looks like you've got the makings of a nice mossy mount!
I was just mentioning to Ross, that I goofed up the tags while watering. . .so I THINK this is my Angraecum diderii. There is a chance (50/50) that it's my Aerangis articulata though, I must tell you.
Please advise. . .Spike or Root?
That is your articulata. In addition to the roots being distinctly different, the leaves are also quite different.