The natural range in Florida appears to include the entire mainland and exclude the Florida keys.  Herbarium specimen in the Florida Keys was in a man-made pond leading to the suspicion that the plant was brought in by man and that the keys are not within the natural range of the species. The counties where the plant has not been documented are well within the range of the species and have ample habitats to support this common species (this author has seen it in most of those counties). Wetland gardens and pond edges. Used in wetland restoration.