Flowing Water Plant ID
I discovered this very pretty water plant today. It seems to spread by "runners," but the runners have a thickness that is more akin to branches. Every two to three feet one of these little plants sprouts up. They are only about a foot tall. The plant/plants are taking up a huge portion of a shallow lake, so it is either very vigorous, or possibly invasive. I'd love help, if anyone knows what it is.