FRQ
   20 NUPHAR LUTEUM SM.       1-6
   16 SPARGANIUM SIMPLEX HUDS 1-6
   14 MYRIOPHYLLUM SPICATUM L 1-6
   13 NUPHAR LUTEUM SM.       4-6
   12 SAGITTARIA SAGITTIFOLIA 1-6

    8 POTAMOGETON PECTINATUS  1-6
    8 CERATOPHYLLUM DEMERSUM  1-6
    6 SPARGANIUM SIMPLEX HUDS 3-6
    5 LEMNA MINOR L.          1-6
    5 NYMPHAEA ALBA L.        1-6

    4 POTAMOGETON LUCENS L.   1-6
    3 POTAMOGETON PERFOLIATUS 1-6
    3 POTAMOGETON FLUITANS RO 1-6
    3 SPIRODELA POLYRRHIZA (L 1-6
    3 HOTTONIA PALUSTRIS L.   1-6

    1 POTAMOGETON PERFOLIATUS 3-6
    1 POTAMOGETON LUCENS L.   4-6
    1 POTAMOGETON CRISPUS L.  1-6
    1 SAGITTARIA SAGITTIFOLIA 3-6
    1 RANUNCULUS CIRCINATUS S 1-6