As a point of interest....Aeschynomene fluitans is actually a rooted plant that floats. If floats fine for quite awhile, but eventually needs to be rooted in a substrate. At least that is my experience here in SW FL were it grows year round. It is quite possible, that given a shorter season, it will do just fine left to float.
Truth is not what you want it to be; it is what it is. And you must bend to its power or live a lie.”― Miyamoto Musashi
"Knowledge speaks, but wisdom listens." ~ Jimi Hendrix
“The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.”― Stephen Hawking
Craig