19 SPIRODELA POLYRRHIZA (L 1-6
   17 CALLITRICHE OBTUSANGULA 1-6
   17 CERATOPHYLLUM DEMERSUM  1-6
   17 LEMNA MINOR L.          1-6
   16 SPARGANIUM SIMPLEX HUDS 1-6
   12 MYRIOPHYLLUM SPICATUM L 1-6
   11 RANUNCULUS FLUITANS LAM 1-6
   11 POTAMOGETON PECTINATUS  1-6
    9 POTAMOGETON FLUITANS RO 1-6

    7 CALLITRICHE OBTUSANGULA 3-6
    7 RORIPA AMPHIBIA (L.) BE 1-6
    7 POLYGONUM HYDROPIPER L. 1-6
    6 NUPHAR LUTEUM SM.       1-6
    5 POTAMOGETON MUCRONATUS  1-5
    4 SPARGANIUM SIMPLEX HUDS 3-6
    3 HELODEA CANADENSIS RICH 1-6
    3 LEMNA MINOR L.          3-6
    3 POTAMOGETON FLUITANS RO 3-6

    3 POTAMOGETON LUCENS L.   1-6
    2 NASTURTIUM OFFICINALE R 1-6
    2 RANUNCULUS CIRCINATUS S 1-6
    2 PHALARIS ARUNDINACEA L. 1-6
    2 IRIS PSEUDACORUS L.     1-6
    2 POTAMOGETON CRISPUS L.  1-6
    2 POTAMOGETON PECTINATUS  4-6
    2 POTAMOGETON PERFOLIATUS 1-6
    1 VERONICA ANAGALLIS L.   1-5

    1 SIUM ERECTUM HUDSON     1-6
    1 SAGITTARIA SAGITTIFOLIA 1-6
    1 ARUNDO PHRAGMITES L.    1-6
    1 GLYCERIA ALTISSIMA (MOE 1-6
    1 LEMNA TRISULCA L.       1-6
    1 POTAMOGETON CRISPUS L.  3-6
    1 POTAMOGETON CRISPUS L.  2-6
    1 ZANNICHELLIA PALUSTRIS  1-6