24 LEMNA TRISULCA L.       1-6
   22 CALLITRICHE OBTUSANGULA 1-6
   21 SIUM ERECTUM HUDSON     1-6
   19 POTAMOGETON PECTINATUS  1-6
   17 MYRIOPHYLLUM VERTICILLA 1-6
   16 POTAMOGETON CRISPUS L.  1-6
   15 POTAMOGETON DENSUS L.   1-6
   15 POTAMOGETON MUCRONATUS  1-5
   14 LEMNA MINOR L.          1-6
   13 RANUNCULUS CIRCINATUS S 1-6

   13 HELODEA CANADENSIS RICH 1-6
   11 SPARGANIUM SIMPLEX HUDS 1-6
   10 POTAMOGETON CRISPUS L.  2-6
    9 CALLITRICHE OBTUSANGULA 3-6
    9 MYRIOPHYLLUM SPICATUM L 1-6
    9 AZOLLA FILICULOIDES LAM 1-6
    7 POTAMOGETON LUCENS L.   1-6
    7 POTAMOGETON PUSILLUS L. 1-6
    6 POTAMOGETON DENSUS L.   3-6
    5 CERATOPHYLLUM DEMERSUM  1-6

    5 SPIRODELA POLYRRHIZA (L 1-6
    4 NUPHAR LUTEUM SM.       1-6
    4 ZANNICHELLIA PALUSTRIS  1-6
    3 HELODEA CANADENSIS RICH 4-6
    3 LEMNA TRISULCA L.       4-6
    3 POTAMOGETON LUCENS L.   4-6
    3 POTAMOGETON PECTINATUS  4-6
    3 SPARGANIUM SIMPLEX HUDS 3-6
    2 POTAMOGETON MUCRONATUS  3-5
    2 POTAMOGETON PERFOLIATUS 1-6

    1 HIPPURIS VULGARIS L.    1-6
    1 RANUNCULUS CIRCINATUS S 3-6
    1 VERONICA ANAGALLIS L.   1-5
    1 OENANTHE FLUVIATILIS CO 1-4
    1 POTAMOGETON CRISPUS L.  3-6
    1 POTAMOGETON PERFOLIATUS 3-6
    1 POTAMOGETON PUSILLUS L. 3-6
    1 POTAMOGETON TRICHOIDES  1-6