FRQ
   30 RANUNCULUS CIRCINATUS S 1-6
   30 MYRIOPHYLLUM SPICATUM L 1-6
   22 CERATOPHYLLUM DEMERSUM  1-6
   14 MYRIOPHYLLUM SPICATUM L 4-6
   13 RANUNCULUS CIRCINATUS S 3-6
   11 HELODEA CANADENSIS RICH 1-6

   10 POTAMOGETON PECTINATUS  1-6
   10 POTAMOGETON LUCENS L.   1-6
   10 POTAMOGETON CRISPUS L.  1-6
    8 POTAMOGETON PUSILLUS L. 1-6
    7 POTAMOGETON PERFOLIATUS 1-6
    7 LEMNA MINOR L.          1-6

    6 POTAMOGETON FLUITANS RO 1-6
    5 CERATOPHYLLUM DEMERSUM  4-6
    3 SPIRODELA POLYRRHIZA (L 1-6
    3 LEMNA TRISULCA L.       1-6
    2 NAIAS MAJOR ALL.        1-6
    2 NYMPHAEA ALBA L.        1-6

    2 CALLITRICHE OBTUSANGULA 1-6
    1 SPARGANIUM SIMPLEX HUDS 1-6
    1 POTAMOGETON PECTINATUS  4-6
    1 POTAMOGETON LUCENS L.   4-6
    1 NUPHAR LUTEUM SM.       1-6