I know the picture would make it easier but It just won't upload. I found a plant growing in one of the pools on my site and I can't figure out what it is. It has red stems and spade shaped green leave. I thought first it was a pickeral weed but the red stems. I am leaning to red stemmed Sagittaria due to the flower stalks coming up but I do not believe they are native this far north. Does anyone have a suggestion