FRQ
   33 CERATOPHYLLUM DEMERSUM  1-6
   27 NUPHAR LUTEUM SM.       1-6
   25 MYRIOPHYLLUM VERTICILLA 1-6
   23 POTAMOGETON PECTINATUS  1-6
   23 MYRIOPHYLLUM SPICATUM L 1-6
   22 HELODEA CANADENSIS RICH 1-6
   21 SPARGANIUM SIMPLEX HUDS 1-6
   18 RANUNCULUS CIRCINATUS S 1-6
   17 POTAMOGETON LUCENS L.   1-6
   14 POTAMOGETON NATANS L.   1-6

   13 CERATOPHYLLUM DEMERSUM  4-6
    9 RANUNCULUS CIRCINATUS S 3-6
    9 NUPHAR LUTEUM SM.       4-6
    8 POTAMOGETON PERFOLIATUS 1-6
    8 POTAMOGETON CRISPUS L.  1-6
    7 HOTTONIA PALUSTRIS L.   1-6
    7 NYMPHAEA ALBA L.        1-6
    6 POTAMOGETON DENSUS L.   1-6
    5 SPARGANIUM SIMPLEX HUDS 3-6
    5 POTAMOGETON MUCRONATUS  1-5

    4 POTAMOGETON PUSILLUS L. 1-6
    4 POTAMOGETON NATANS L.   4-6
    4 LEMNA TRISULCA L.       1-6
    4 SAGITTARIA SAGITTIFOLIA 1-6
    4 LUDWIGIA PALUSTRIS (L.) 1-6
    3 ZANNICHELLIA PALUSTRIS  1-6
    3 LEMNA MINOR L.          1-6
    3 MYRIOPHYLLUM SPICATUM L 4-6
    2 POTAMOGETON PECTINATUS  4-6
    2 POTAMOGETON MUCRONATUS  3-5

    2 HYDROCHARIS MORSUS-RANA 1-6
    2 HELODEA CANADENSIS RICH 4-6
    2 SCIRPUS LACUSTRIS L.    1-6
    2 RANUNCULUS TRICHOPHYLLU 1-6
    2 HIPPURIS VULGARIS L.    1-6
    1 POTAMOGETON LUCENS L.   4-6
    1 SPIRODELA POLYRRHIZA (L 1-6
    1 LUDWIGIA PALUSTRIS (L.) 4-6
    1 NYMPHAEA ALBA L.        5-6
    1 CALLITRICHE OBTUSANGULA 1-6