I found this plant in a wooded area in Virginia. It has four petals when they open. The stem has very small, but not sharp, spikes. The leaves are fuzzy. There were two color varieties of this plant, the purple/fuchsia/pink seen on this on and a more light purple. The plants spread by sending runners out. Any help and insight provided would be really appreciated since I can't find anything in my guide books or online. I'm dying to know if it's a weed or a native. Thanks!