FRQ
   64 LEMNA MINOR L.          1-6
   54 CERATOPHYLLUM DEMERSUM  1-6
   50 POTAMOGETON PECTINATUS  1-6
   47 SPIRODELA POLYRRHIZA (L 1-6
   47 MYRIOPHYLLUM SPICATUM L 1-6
   21 POTAMOGETON PERFOLIATUS 1-6
   19 POTAMOGETON LUCENS L.   1-6
   19 POTAMOGETON FLUITANS RO 1-6
   19 BUTOMUS UMBELLATUS L.   1-6
   16 CERATOPHYLLUM DEMERSUM  4-6
   15 LEMNA GIBBA L.          1-6
   14 AZOLLA FILICULOIDES LAM 1-6

   11 MYRIOPHYLLUM SPICATUM L 4-6
   11 CALLITRICHE OBTUSANGULA 1-6
   10 POTAMOGETON FLUITANS RO 4-6
   10 POTAMOGETON CRISPUS L.  1-6
   10 RANUNCULUS FLUITANS LAM 1-6
    9 SPARGANIUM SIMPLEX HUDS 1-6
    8 SPIRODELA POLYRRHIZA (L 3-6
    7 LEMNA MINOR L.          3-6
    6 POTAMOGETON PECTINATUS  4-6
    6 NUPHAR LUTEUM SM.       1-6
    5 POTAMOGETON PERFOLIATUS 3-6
    3 POTAMOGETON LUCENS L.   4-6

    3 SAGITTARIA SAGITTIFOLIA 1-6
    3 RANUNCULUS CIRCINATUS S 1-6
    2 POTAMOGETON TRICHOIDES  1-6
    2 POTAMOGETON PUSILLUS L. 1-6
    2 POTAMOGETON MUCRONATUS  1-5
    2 LEMNA TRISULCA L.       1-6
    2 HYDROCHARIS MORSUS-RANA 1-6
    2 HELODEA CANADENSIS RICH 1-6
    2 UTRICULARIA MAJOR SCHMI 1-6
    2 MYRIOPHYLLUM VERTICILLA 1-6
    1 AZOLLA FILICULOIDES LAM 3-6
    1 ZANNICHELLIA PALUSTRIS  1-6

    1 SPARGANIUM SIMPLEX HUDS 3-6
    1 POTAMOGETON X-ZIZI MERT 1-6
    1 NAIAS MAJOR ALL.        1-6
    1 VALLISNERIA SPIRALIS L. 1-6
    1 BUTOMUS UMBELLATUS L.   3-6
    1 VERONICA ANAGALLIS L.   1-5
    1 RANUNCULUS FLUITANS LAM 3-6
    1 RANUNCULUS FLUITANS LAM 4-6
    1 NUPHAR LUTEUM SM.       4-6
    1 NASTURTIUM OFFICINALE R 1-6
    1 CALLITRICHE OBTUSANGULA 3-6