(quote) Pretty? Yes. But therein lies the rub. People imported these exotic floating Water Hyacinths for their back-yard lily ponds - until they crowded out the lilies. Then they threw them into the lakes and canals, which quickly became overgrown and so clogged that there was no open water left where they were, so they tried to control them. Tried herbicides, which were impractical
I am not sure what has been done but they do not clog the canals like they used to. This was a single plant by itself, I will remove it if I see it again. The fact I did not recognize the flower indicates to me how few are still around.