FRQ
   20 POTAMOGETON NATANS L.   1-6
   17 UTRICULARIA MINOR L.    1-6
   15 MYRIOPHYLLUM VERTICILLA 1-6
   14 SPARGANIUM MINIMUM FRIE 1-6
   14 UTRICULARIA VULGARIS L. 1-6
   12 POTAMOGETON LUCENS L.   1-6
    8 SPARGANIUM MINIMUM FRIE 4-6
    8 ALISMA NATANS L.        1-6
    8 NUPHAR LUTEUM SM.       1-6
    7 HELODEA CANADENSIS RICH 1-6
    7 ALISMA NATANS L.        3-6
    7 NYMPHAEA ALBA L.        1-6

    6 UTRICULARIA VULGARIS L. 3-6
    6 MYRIOPHYLLUM SPICATUM L 1-6
    5 LEMNA MINOR L.          1-6
    4 POTAMOGETON NATANS L.   4-6
    4 POTAMOGETON COLORATUS V 1-6
    4 LEMNA TRISULCA L.       1-6
    4 UTRICULARIA MINOR L.    3-6
    3 POTAMOGETON PUSILLUS L. 1-6
    3 ARUNDO PHRAGMITES L.    1-6
    3 CAREX ELATA ALL.        1-6
    3 CALLITRICHE HAMULATA KU 1-6
    2 POTAMOGETON COLORATUS V 4-6

    2 SCIRPUS LACUSTRIS L.    1-6
    2 RANUNCULUS AQUATILIS L. 1-6
    2 LUDWIGIA PALUSTRIS (L.) 1-6
    2 CALLITRICHE OBTUSANGULA 1-6
    1 SPARGANIUM SIMPLEX HUDS 1-6
    1 SPARGANIUM RAMOSUM CURT 1-6
    1 POTAMOGETON PUSILLUS L. 3-6
    1 POTAMOGETON PERFOLIATUS 1-6
    1 POTAMOGETON DENSUS L.   1-6
    1 POTAMOGETON CRISPUS L.  1-6
    1 LEMNA GIBBA L.          1-6
    1 HYDROCHARIS MORSUS-RANA 1-6

    1 HYDROCHARIS MORSUS-RANA 4-6
    1 HELODEA CANADENSIS RICH 4-6
    1 SCIRPUS ACICULARIS L.   1-6
    1 SAGITTARIA SAGITTIFOLIA 1-6
    1 SIUM ERECTUM HUDSON     1-6
    1 NYMPHAEA ALBA L.        5-6
    1 NUPHAR LUTEUM SM.       4-6
    1 HIPPURIS VULGARIS L.    1-6
    1 MYRIOPHYLLUM BRASILIENS 1-4
    1 CERATOPHYLLUM SUBMERSUM 1-6
    1 CERATOPHYLLUM DEMERSUM  1-6
    1 CALLITRICHE OBTUSANGULA 3-6