25 LEMNA MINOR L.          1-6
   22 CALLITRICHE OBTUSANGULA 1-6
   18 SPIRODELA POLYRRHIZA (L 1-6
   14 LEMNA MINOR L.          3-6
    8 CERATOPHYLLUM DEMERSUM  1-6
    6 CALLITRICHE OBTUSANGULA 3-6
    6 RANUNCULUS FLUITANS LAM 1-6

    5 LEMNA GIBBA L.          1-6
    4 SPIRODELA POLYRRHIZA (L 3-6
    4 POTAMOGETON FLUITANS RO 1-6
    4 POTAMOGETON PECTINATUS  1-6
    4 AZOLLA FILICULOIDES LAM 1-6
    3 NASTURTIUM OFFICINALE R 1-6
    3 MYRIOPHYLLUM SPICATUM L 1-6

    3 BUTOMUS UMBELLATUS L.   1-5
    3 LEMNA TRISULCA L.       1-6
    2 RANUNCULUS FLUITANS LAM 3-6
    2 GLYCERIA ALTISSIMA (MOE 1-6
    1 CERATOPHYLLUM DEMERSUM  5-6
    1 OENANTHE FLUVIATILIS CO 1-4
    1 POTAMOGETON FLUITANS RO 3-6

    1 POTAMOGETON PERFOLIATUS 3-6
    1 POTAMOGETON PERFOLIATUS 1-6
    1 SPARGANIUM RAMOSUM CURT 1-6
    1 SALVINIA NATANS (L.) AL 1-6