EditorialRootless Wolffie, Trifoliate duckweed, Small duckweed and Humpback duckweed, A: Wolffia arrhiza Wimmer - Rootless Wolffie or Rootless Dwarf Water Lent, B and C: Lemna trisulca L. - Trifoliate Dyplin, D: Lemna minor L. - Small Duckweed, Duckflies, Duckw...