FRQ
   24 ARUNDO PHRAGMITES L.    1-6
   22 NUPHAR LUTEUM SM.       1-6
   17 NUPHAR LUTEUM SM.       4-6
    8 SPARGANIUM RAMOSUM CURT 1-6
    8 POTAMOGETON NATANS L.   1-6
    6 SPARGANIUM RAMOSUM CURT 3-6

    6 ARUNDO PHRAGMITES L.    4-6
    6 NYMPHAEA ALBA L.        1-6
    4 HELODEA CANADENSIS RICH 1-6
    4 SIUM ERECTUM HUDSON     1-6
    3 POTAMOGETON NATANS L.   4-6
    3 SCIRPUS LACUSTRIS L.    1-6

    3 TRAPA NATANS L.         1-6
    2 SPARGANIUM SIMPLEX HUDS 1-6
    2 CERATOPHYLLUM DEMERSUM  1-6
    1 TYPHA LATIFOLIA L.      1-6
    1 SPARGANIUM SIMPLEX HUDS 3-6
    1 POTAMOGETON PUSILLUS L. 1-6

    1 POTAMOGETON PUSILLUS L. 3-6
    1 ALISMA PLANTAGO L.      1-6
    1 MYRIOPHYLLUM VERTICILLA 1-6
    1 RORIPA AMPHIBIA (L.) BE 1-6
    1 NASTURTIUM OFFICINALE R 1-6