FRQ
   15 MYRIOPHYLLUM SPICATUM L 1-6
   14 POTAMOGETON PECTINATUS  1-6
   10 MYRIOPHYLLUM SPICATUM L 4-6
    7 POTAMOGETON PECTINATUS  4-6
    6 POTAMOGETON CRISPUS L.  1-6
    4 POTAMOGETON X-ZIZI MERT 1-6
    3 ZANNICHELLIA PALUSTRIS  1-6

    3 NAIAS MAJOR ALL.        1-6
    2 POTA PUSI SUBS PANORMIT 1-6
    2 POTAMOGETON PUSILLUS L. 1-6
    2 POTAMOGETON LUCENS L.   1-6
    2 NAIAS MAJOR ALL.        4-6
    2 LEMNA MINOR L.          1-6
    2 BUTOMUS UMBELLATUS L.   1-6

    2 TRAPA NATANS L.         1-6
    1 AZOLLA FILICULOIDES LAM 1-6
    1 SPARGANIUM SIMPLEX HUDS 1-6
    1 POTAMOGETON X-ZIZI MERT 4-6
    1 POTAMOGETON PUSILLUS L. 3-6
    1 POTAMOGETON PERFOLIATUS 1-6
    1 POTAMOGETON PERFOLIATUS 3-6

    1 NAIAS MINOR ALL.        1-6
    1 SPIRODELA POLYRRHIZA (L 1-6
    1 RANUNCULUS TRICHOPHYLLU 1-6
    1 RANUNCULUS CIRCINATUS S 1-6
    1 RANUNCULUS CIRCINATUS S 3-6
    1 NUPHAR LUTEUM SM.       1-6
    1 CERATOPHYLLUM DEMERSUM  1-6