I noticed this growing around the base of the japanese umbrella pine awhile back and let it grow for awhile before taking a cutting. Anyway, the original plant got too big and I potted it too.
I know it's a weed but I think it's a really awesome looking plant. Kinda like a jade plant, in a way. I was wondering, though, if there was any way go overwinter it, or keep it going for more than a single growing season.