20 LEMNA MINOR L.          1-6
   19 CALLITRICHE OBTUSANGULA 1-6
   16 SPIRODELA POLYRRHIZA (L 1-6
   15 POTAMOGETON PECTINATUS  1-6
   13 CERATOPHYLLUM DEMERSUM  1-6
   13 SPARGANIUM SIMPLEX HUDS 1-6
   12 MYRIOPHYLLUM SPICATUM L 1-6
    8 RANUNCULUS FLUITANS LAM 1-6
    8 LEMNA MINOR L.          3-6

    7 NUPHAR LUTEUM SM.       1-6
    5 POTAMOGETON CRISPUS L.  1-6
    4 RANUNCULUS CIRCINATUS S 1-6
    4 LEMNA GIBBA L.          1-6
    4 POTAMOGETON FLUITANS RO 1-6
    4 SPARGANIUM SIMPLEX HUDS 3-6
    4 AZOLLA FILICULOIDES LAM 1-6
    3 RANUNCULUS CIRCINATUS S 3-6
    3 LEMNA TRISULCA L.       1-6

    3 SPIRODELA POLYRRHIZA (L 3-6
    3 POTAMOGETON LUCENS L.   1-6
    3 POTAMOGETON PERFOLIATUS 1-6
    2 CALLITRICHE OBTUSANGULA 3-6
    2 VERONICA ANAGALLIS L.   1-5
    2 ZANNICHELLIA PALUSTRIS  1-6
    1 NASTURTIUM OFFICINALE R 1-6
    1 MYRIOPHYLLUM VERTICILLA 1-6
    1 HIPPURIS VULGARIS L.    1-6

    1 NUPHAR LUTEUM SM.       4-6
    1 SIUM ERECTUM HUDSON     1-6
    1 SAGITTARIA SAGITTIFOLIA 1-6
    1 HELODEA CANADENSIS RICH 1-6
    1 POTAMOGETON CRISPUS L.  2-6
    1 POTAMOGETON PUSILLUS L. 1-6