38 CALLITRICHE OBTUSANGULA 1-6
   38 LEMNA MINOR L.          1-6
   36 POTAMOGETON PECTINATUS  1-6
   32 LEMNA TRISULCA L.       1-6
   28 POTAMOGETON CRISPUS L.  1-6
   23 SIUM ERECTUM HUDSON     1-6
   22 SPARGANIUM SIMPLEX HUDS 1-6
   19 MYRIOPHYLLUM SPICATUM L 1-6
   18 MYRIOPHYLLUM VERTICILLA 1-6
   18 HELODEA CANADENSIS RICH 1-6
   18 SPIRODELA POLYRRHIZA (L 1-6
   18 POTAMOGETON MUCRONATUS  1-5
   17 POTAMOGETON DENSUS L.   1-6

   16 RANUNCULUS CIRCINATUS S 1-6
   15 CERATOPHYLLUM DEMERSUM  1-6
   15 POTAMOGETON CRISPUS L.  2-6
   13 LEMNA MINOR L.          3-6
   13 AZOLLA FILICULOIDES LAM 1-6
   12 CALLITRICHE OBTUSANGULA 3-6
   12 NUPHAR LUTEUM SM.       1-6
   10 POTAMOGETON PUSILLUS L. 1-6
    8 POTAMOGETON PECTINATUS  4-6
    8 SPARGANIUM SIMPLEX HUDS 3-6
    8 ZANNICHELLIA PALUSTRIS  1-6
    7 POTAMOGETON LUCENS L.   1-6
    6 POTAMOGETON DENSUS L.   3-6

    3 RANUNCULUS CIRCINATUS S 3-6
    3 HELODEA CANADENSIS RICH 4-6
    3 LEMNA GIBBA L.          1-6
    3 LEMNA TRISULCA L.       4-6
    3 SPIRODELA POLYRRHIZA (L 3-6
    3 POTAMOGETON LUCENS L.   4-6
    3 POTAMOGETON PERFOLIATUS 1-6
    2 NASTURTIUM OFFICINALE R 1-6
    2 HIPPURIS VULGARIS L.    1-6
    2 POTAMOGETON CRISPUS L.  3-6
    2 POTAMOGETON MUCRONATUS  3-5
    2 POTAMOGETON NATANS L.   1-6
    2 AZOLLA FILICULOIDES LAM 3-6

    1 RANUNCULUS FLUITANS LAM 1-6
    1 RANUNCULUS TRICHOPHYLLU 1-6
    1 VERONICA ANAGALLIS L.   1-5
    1 VERONICA BECCABUNGA L.  1-6
    1 OENANTHE FLUVIATILIS CO 1-4
    1 SAGITTARIA SAGITTIFOLIA 1-6
    1 POTAMOGETON PERFOLIATUS 3-6
    1 POTAMOGETON PUSILLUS L. 3-6
    1 POTAMOGETON TRICHOIDES  1-6
    1 SPARGANIUM RAMOSUM CURT 1-6