FRQ
   51 MYRIOPHYLLUM SPICATUM L 1-6
   33 RANUNCULUS CIRCINATUS S 1-6
   32 MYRIOPHYLLUM SPICATUM L 4-6
   26 POTAMOGETON LUCENS L.   1-6
   22 CERATOPHYLLUM DEMERSUM  1-6
   14 RANUNCULUS CIRCINATUS S 3-6
   12 POTAMOGETON PERFOLIATUS 1-6

   12 POTAMOGETON PECTINATUS  1-6
   12 POTAMOGETON CRISPUS L.  1-6
   12 HELODEA CANADENSIS RICH 1-6
   12 NUPHAR LUTEUM SM.       1-6
    8 POTAMOGETON PUSILLUS L. 1-6
    7 POTAMOGETON NATANS L.   1-6
    7 LEMNA MINOR L.          1-6

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

    2 POTAMOGETON PERFOLIATUS 3-6
    2 POTAMOGETON PECTINATUS  4-6
    2 CALLITRICHE OBTUSANGULA 1-6
    1 SPARGANIUM SIMPLEX HUDS 1-6
    1 MYRIOPHYLLUM VERTICILLA 1-6