that is very interesting! I'm in the desert, so the only way I'd get them is to build a pond and plant some.They are! The whole plant is I believe but the rooots/young shoots and flowers are tastiest I hear/read. I have yet to try it, I just started using them to make shady spots for the fish. But while researching them (didn't want them to hurt the balance in the pond
I use invasive plants and have kids and pets so I have to be diligent with knowing all I can) I found a lot on how to eat them and survive if lost! What I thought was a pretty weed, turns out to be very much beneficial in a controlled environment. (well semi controlled lol this *is* Louisiana, nature does as it pleases!)