FRQ
   25 MYRIOPHYLLUM SPICATUM L 1-6
   21 POTAMOGETON PERFOLIATUS 1-6
   21 POTAMOGETON PECTINATUS  1-6
   20 CERATOPHYLLUM DEMERSUM  1-6
   13 NUPHAR LUTEUM SM.       1-6
   12 POTAMOGETON PERFOLIATUS 3-6
   12 RANUNCULUS FLUITANS LAM 1-6
   11 POTAMOGETON LUCENS L.   1-6

    7 POTAMOGETON FLUITANS RO 1-6
    7 VALLISNERIA SPIRALIS L. 1-6
    6 SPARGANIUM SIMPLEX HUDS 1-6
    6 NUPHAR LUTEUM SM.       4-6
    4 POTAMOGETON CRISPUS L.  1-6
    4 SAGITTARIA SAGITTIFOLIA 1-6
    3 SPARGANIUM SIMPLEX HUDS 3-6
    3 POTAMOGETON FLUITANS RO 4-6

    3 BUTOMUS UMBELLATUS L.   1-6
    2 POTAMOGETON OBTUSIFOLIU 1-6
    2 POTAMOGETON LUCENS L.   4-6
    2 HELODEA CANADENSIS RICH 1-6
    1 ZANNICHELLIA PALUSTRIS  1-6
    1 POTAMOGETON PECTINATUS  4-6
    1 NAIAS MAJOR ALL.        1-6
    1 SPIRODELA POLYRRHIZA (L 1-6

    1 LEMNA MINOR L.          1-6
    1 HELODEA CANADENSIS RICH 4-6
    1 TRAPA NATANS L.         1-6
    1 RANUNCULUS FLUITANS LAM 3-6
    1 MYRIOPHYLLUM SPICATUM L 4-6