FRQ
   19 PHALARIS ARUNDINACEA L. 1-6
   13 LEMNA MINOR L.          1-6
   12 PHALARIS ARUNDINACEA L. 3-6
    7 SPIRODELA POLYRRHIZA (L 1-6
    7 MYRIOPHYLLUM SPICATUM L 1-6
    5 AZOLLA FILICULOIDES LAM 1-6
    5 POTAMOGETON PECTINATUS  1-6
    5 SPIRODELA POLYRRHIZA (L 3-6
    4 AZOLLA FILICULOIDES LAM 3-6
    4 LEMNA MINOR L.          3-6

    4 LEMNA GIBBA L.          1-6
    4 HELODEA CANADENSIS RICH 1-6
    4 CALLITRICHE OBTUSANGULA 1-6
    3 SPARGANIUM SIMPLEX HUDS 1-6
    3 POTAMOGETON PECTINATUS  4-6
    3 POTAMOGETON DENSUS L.   1-6
    3 RANUNCULUS CIRCINATUS S 1-6
    3 CERATOPHYLLUM DEMERSUM  1-6
    2 IRIS PSEUDACORUS L.     1-6
    2 IRIS PSEUDACORUS L.     2-6

    2 HYDROCHARIS MORSUS-RANA 1-6
    2 BUTOMUS UMBELLATUS L.   1-6
    2 NUPHAR LUTEUM SM.       1-6
    2 MYRIOPHYLLUM SPICATUM L 4-6
    1 ZANNICHELLIA PALUSTRIS  1-6
    1 SPARGANIUM SIMPLEX HUDS 3-6
    1 POTAMOGETON CRISPUS L.  1-6
    1 POTAMOGETON CRISPUS L.  2-6
    1 LEMNA TRISULCA L.       1-6
    1 LEMNA TRISULCA L.       4-6

    1 LEMNA GIBBA L.          4-6
    1 ARUNDO PHRAGMITES L.    1-6
    1 CAREX RIPARIA CURT.     1-6
    1 OENANTHE FLUVIATILIS CO 1-4
    1 APIUM NODIFLORUM (L.) L 1-6
    1 VERONICA ANAGALLIS L.   1-5
    1 RANUNCULUS FLUITANS LAM 1-6
    1 RANUNCULUS CIRCINATUS S 3-6
    1 NUPHAR LUTEUM SM.       4-6
    1 CERATOPHYLLUM DEMERSUM  4-6