111 LEMNA MINOR L.          1-6
  103 SPIRODELA POLYRRHIZA (L 1-6
   77 CERATOPHYLLUM DEMERSUM  1-6
   74 MYRIOPHYLLUM SPICATUM L 1-6
   66 POTAMOGETON PECTINATUS  1-6
   55 CALLITRICHE OBTUSANGULA 1-6
   52 AZOLLA FILICULOIDES LAM 1-6
   39 LEMNA MINOR L.          3-6
   38 LEMNA GIBBA L.          1-6
   31 SPIRODELA POLYRRHIZA (L 3-6
   31 POTAMOGETON LUCENS L.   1-6
   30 POTAMOGETON PERFOLIATUS 1-6
   25 RANUNCULUS FLUITANS LAM 1-6

   25 BUTOMUS UMBELLATUS L.   1-5
   19 AZOLLA FILICULOIDES LAM 3-6
   17 SPARGANIUM SIMPLEX HUDS 1-6
   15 LEMNA TRISULCA L.       1-6
   13 NUPHAR LUTEUM SM.       1-6
   11 POTAMOGETON CRISPUS L.  1-6
   11 POTAMOGETON FLUITANS RO 1-6
    9 CERATOPHYLLUM DEMERSUM  5-6
    9 HELODEA CANADENSIS RICH 1-6
    8 CALLITRICHE OBTUSANGULA 3-6
    8 POTAMOGETON PERFOLIATUS 3-6
    7 MYRIOPHYLLUM VERTICILLA 1-6
    6 NASTURTIUM OFFICINALE R 1-6

    6 RANUNCULUS CIRCINATUS S 1-6
    6 POTAMOGETON PECTINATUS  4-6
    5 MYRIOPHYLLUM SPICATUM L 4-6
    5 RANUNCULUS CIRCINATUS S 3-6
    5 SPARGANIUM SIMPLEX HUDS 3-6
    4 VERONICA ANAGALLIS L.   1-5
    4 POTAMOGETON LUCENS L.   4-6
    4 POTAMOGETON MUCRONATUS  1-5
    4 POTAMOGETON PUSILLUS L. 1-6
    4 ZANNICHELLIA PALUSTRIS  1-6
    3 RANUNCULUS FLUITANS LAM 3-6
    3 SIUM ERECTUM HUDSON     1-6
    3 SAGITTARIA SAGITTIFOLIA 1-6

    3 BUTOMUS UMBELLATUS L.   3-5
    3 POTAMOGETON TRICHOIDES  1-6
    2 GLYCERIA ALTISSIMA (MOE 1-6
    2 SPARGANIUM RAMOSUM CURT 1-6
    1 HIPPURIS VULGARIS L.    1-6
    1 NUPHAR LUTEUM SM.       4-6
    1 RANUNCULUS FLUITANS LAM 4-6
    1 VERONICA BECCABUNGA L.  1-6
    1 OENANTHE FLUVIATILIS CO 1-4
    1 LEMNA GIBBA L.          4-6
    1 POTAMOGETON CRISPUS L.  2-6
    1 POTAMOGETON FLUITANS RO 3-6
    1 SALVINIA NATANS (L.) AL 1-6