82 LEMNA MINOR L.          1-6
   73 SPIRODELA POLYRRHIZA (L 1-6
   57 LEMNA MINOR L.          3-6
   44 SPIRODELA POLYRRHIZA (L 3-6
   36 AZOLLA FILICULOIDES LAM 1-6

   31 LEMNA GIBBA L.          1-6
   28 LEMNA TRISULCA L.       1-6
   11 AZOLLA FILICULOIDES LAM 3-6
    9 CERATOPHYLLUM DEMERSUM  1-6
    7 HYDROCHARIS MORSUS-RANA 1-6

    6 CALLITRICHE OBTUSANGULA 1-6
    2 HIPPURIS VULGARIS L.    1-6
    2 BUTOMUS UMBELLATUS L.   1-6
    2 LEMNA GIBBA L.          4-6
    2 LEMNA TRISULCA L.       4-6

    1 NUPHAR LUTEUM SM.       1-6
    1 POTAMOGETON FLUITANS RO 1-6
    1 POTAMOGETON PECTINATUS  1-6
    1 POTAMOGETON PUSILLUS L. 1-6
    1 SPARGANIUM RAMOSUM CURT 1-6