So I got some pretty floating plants today. A little bit of duckweed and either dwarf water lettuce or frogbit. I am having a lot of trouble figuring the difference of the two. I have seen some pictures of the dwarf water lettuce and they are not not consistent. Are these two different names of the same plant? Or does the dwarf water lettuce resemble frogbit when it's small? I'm pretty confused. Can anyone help me out? Thanks!