94 LEMNA MINOR L.          1-6
   87 CERATOPHYLLUM DEMERSUM  1-6
   75 SPIRODELA POLYRRHIZA (L 1-6
   57 LEMNA MINOR L.          3-6
   50 LEMNA GIBBA L.          1-6
   40 SPIRODELA POLYRRHIZA (L 3-6
   35 CERATOPHYLLUM DEMERSUM  4-6
   33 LEMNA TRISULCA L.       1-6
   33 AZOLLA FILICULOIDES LAM 1-6
   27 MYRIOPHYLLUM SPICATUM L 1-6

   16 HELODEA CANADENSIS RICH 1-6
   16 LEMNA GIBBA L.          4-6
   12 CALLITRICHE OBTUSANGULA 1-6
   12 POTAMOGETON PECTINATUS  1-6
   10 AZOLLA FILICULOIDES LAM 3-6
    8 POTAMOGETON CRISPUS L.  1-6
    8 POTAMOGETON PUSILLUS L. 1-6
    6 RANUNCULUS FLUITANS LAM 1-6
    6 LEMNA TRISULCA L.       4-6
    6 POTAMOGETON LUCENS L.   1-6

    6 POTAMOGETON PERFOLIATUS 1-6
    5 RANUNCULUS CIRCINATUS S 1-6
    4 POTAMOGETON TRICHOIDES  1-6
    3 NUPHAR LUTEUM SM.       1-6
    3 SAGITTARIA SAGITTIFOLIA 1-6
    3 POTAMOGETON PECTINATUS  4-6
    2 MYRIOPHYLLUM VERTICILLA 1-6
    2 HYDROCHARIS MORSUS-RANA 1-6
    2 WOLFFIA ARRHIZA (L.) WI 1-6
    2 NAIAS MAJOR ALL.        1-6

    2 POTAMOGETON FLUITANS RO 1-6
    2 SALVINIA NATANS (L.) AL 1-6
    1 UTRICULARIA VULGARIS L. 1-6
    1 RANUNCULUS CIRCINATUS S 3-6
    1 RANUNCULUS TRICHOPHYLLU 3-6
    1 RANUNCULUS TRICHOPHYLLU 1-6
    1 POTAMOGETON LUCENS L.   4-6
    1 POTAMOGETON MUCRONATUS  1-5
    1 POTAMOGETON PUSILLUS L. 3-6