It's not a great pic (taken with my phone), but this hitch-hiked in on some plants, and I know I saw a thread somewhere with an ID for this before, but I can't remember what it is, and I can't find that post. It's basically a very long thin stem with nodes. At each node is a little ball shape, and two little 'hairs'/stems that grow out of it. I've been picking it out anytime I find a piece, but was hoping for more info. Thanks!