This first showed up voluntarily in my front porch flower garden. It has a woody stem and I've observed from the past 2-3 years that it spreads new growth by sending out runners. But then again, one also came up all by it's self in another pot. I have no clue what it is, but it's pretty so I just try to keep it somewhat contained.
The pictures are the 3 stages of berry like things - then whitish flowers that turn pink,