FRQ
  120 TRAPA NATANS L.         1-6
   87 TRAPA NATANS L.         4-6
   79 CERATOPHYLLUM DEMERSUM  1-6
   59 CERATOPHYLLUM DEMERSUM  4-6
   45 POTAMOGETON LUCENS L.   1-6
   40 POTAMOGETON TRICHOIDES  1-6
   24 NUPHAR LUTEUM SM.       1-6
   17 RANUNCULUS CIRCINATUS S 1-6
   15 POTAMOGETON LUCENS L.   4-6
   14 SPIRODELA POLYRRHIZA (L 1-6
   14 NYMPHAEA ALBA L.        1-6
   13 LEMNA MINOR L.          1-6
   13 MYRIOPHYLLUM SPICATUM L 1-6

   12 NYMPHOIDES PELTATA (GME 1-6
   12 MYRIOPHYLLUM VERTICILLA 1-6
   10 NAIAS MAJOR ALL.        1-6
   10 RANUNCULUS CIRCINATUS S 3-6
    9 HELODEA CANADENSIS RICH 1-6
    7 POTAMOGETON OBTUSIFOLIU 1-6
    7 HELODEA CANADENSIS RICH 4-6
    6 NAIAS MINOR ALL.        1-6
    5 SALVINIA NATANS (L.) AL 1-6
    4 NUPHAR LUTEUM SM.       4-6
    4 NYMPHOIDES PELTATA (GME 5-6
    3 POTAMOGETON TRICHOIDES  4-6
    3 NYMP ALBA VAR. ALBA     1-6

    3 NYMPHAEA ALBA L.        5-6
    3 UTRICULARIA MAJOR SCHMI 1-6
    2 POTAMOGETON PERFOLIATUS 1-6
    2 POTAMOGETON CRISPUS L.  1-6
    2 NAIAS MAJOR ALL.        4-6
    2 LEMNA MINOR L.          3-6
    1 SALVINIA NATANS (L.) AL 5-6
    1 AZOLLA FILICULOIDES LAM 1-6
    1 SPARGANIUM SIMPLEX HUDS 1-6
    1 POTAMOGETON RUFESCENS S 1-6
    1 POTAMOGETON PUSILLUS L. 1-6
    1 POTAMOGETON PECTINATUS  1-6
    1 POTAMOGETON OBTUSIFOLIU 4-6

    1 POTAMOGETON NATANS L.   1-6
    1 LEMNA TRISULCA L.       1-6
    1 HYDROCHARIS MORSUS-RANA 1-6
    1 SCIRPUS LACUSTRIS L.    1-6
    1 SAGITTARIA SAGITTIFOLIA 1-6
    1 RANUNCULUS AQUATILIS L. 1-6
    1 UTRICULARIA VULGARIS L. 1-6
    1 HIPPURIS VULGARIS L.    1-6
    1 MYRIOPHYLLUM SPICATUM L 4-6
    1 CERATOPHYLLUM SUBMERSUM 1-6