47 LEMNA MINOR L.          1-6
   43 SPIRODELA POLYRRHIZA (L 1-6
   41 MYRIOPHYLLUM SPICATUM L 1-6
   35 CERATOPHYLLUM DEMERSUM  1-6
   31 POTAMOGETON PECTINATUS  1-6
   25 AZOLLA FILICULOIDES LAM 1-6
   24 LEMNA GIBBA L.          1-6
   21 POTAMOGETON PERFOLIATUS 1-6

   21 POTAMOGETON LUCENS L.   1-6
   16 BUTOMUS UMBELLATUS L.   1-5
   14 LEMNA MINOR L.          3-6
   13 SPIRODELA POLYRRHIZA (L 3-6
   10 RANUNCULUS FLUITANS LAM 1-6
    7 CALLITRICHE OBTUSANGULA 1-6
    5 POTAMOGETON PERFOLIATUS 3-6
    4 AZOLLA FILICULOIDES LAM 3-6

    4 POTAMOGETON LUCENS L.   4-6
    3 HELODEA CANADENSIS RICH 1-6
    2 SPARGANIUM SIMPLEX HUDS 1-6
    2 POTAMOGETON TRICHOIDES  1-6
    2 POTAMOGETON PECTINATUS  4-6
    2 CERATOPHYLLUM DEMERSUM  5-6
    1 SPARGANIUM RAMOSUM CURT 1-6
    1 POTAMOGETON FLUITANS RO 1-6

    1 POTAMOGETON CRISPUS L.  1-6
    1 LEMNA GIBBA L.          4-6
    1 BUTOMUS UMBELLATUS L.   3-5
    1 SAGITTARIA SAGITTIFOLIA 1-6
    1 VERONICA ANAGALLIS L.   1-5
    1 MYRIOPHYLLUM VERTICILLA 1-6
    1 MYRIOPHYLLUM SPICATUM L 4-6
    1 NASTURTIUM OFFICINALE R 1-6