Pikerelweed

When I was hiking down this path, which is the Blue Trail in Wekiwa, I came across this little swampy stream.

 It was filled with Pickerelweed, which is an aquatic herb with a creeping, submerged rhizome and violet-blue flower spikes extending above water.  It flowers between June and November and is found in freshwater marshes and edges of ponds, lakes, and strams, such as the one in the picture.  The seeds can be eaten like nuts and the young leaves cooked as greens.  Deer also feed on these plants.  It also attracts butterflies.