12-14-2009, 04:44 PM
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It sends floating leaves. The Nuphar, Nymphaea and Nymphoides genera of plants will all produce floating leaves, depending in some cases upon light intensity and/or substrate enrichment. The latter genus is the banana plant, so called.
For true floaters, there is Ceratopteris (water sprite) and Amazon frogbit (Limnobium laevigatum). I have both, the latter flowers, quite lovely little flowers actually, most aquarium plants don't have much in the way of flowers but when my Frogbit bloomed I was quite surprised.
Duckweed can be a mess. Salvinia is a similar but nicer (in my opinion) plant, but also small and thus likely to be more like duckweed. The other two I mentioned have larger leaves. Ceratopteris will spread right across the aquarium surface quickly, it is a good plant for water filtration because of its fast growth. And very useful with its dangling roots that hide fry, support bubblenests, serve as feeding grounds for many fish, etc.