0.27 LEMNA TRISULCA L.       4-6
 0.29 HYDROCHARIS MORSUS-RANA 1-6
 0.34 LEMNA MINOR L.          1-6
 0.36 SPIRODELA POLYRRHIZA (L 1-6
 0.40 HYDROCHARIS MORSUS-RANA 4-6
 0.41 LEMNA MINOR L.          3-6
 0.49 SPIRODELA POLYRRHIZA (L 3-6
 0.49 HOTTONIA PALUSTRIS L.   1-6
   0.50 SALVINIA NATANS (L.) AL 1-6
 0.51 HELODEA CANADENSIS RICH 1-6
 0.52 POTAMOGETON NATANS L.   1-6
 0.52 HOTTONIA PALUSTRIS L.   3-6
   0.52 POTAMOGETON COMPRESSUS  1-3
 0.53 SAGITTARIA SAGITTIFOLIA 1-6
 0.53 UTRICULARIA VULGARIS L. 1-6
 0.54 CERATOPHYLLUM DEMERSUM  1-6
   0.54 RICCIOCARPUS NATANS (L.)  1
 0.55 NUPHAR LUTEUM SM.       1-6
 0.56 LEMNA GIBBA L.          1-6
 0.56 UTRICULARIA VULGARIS L. 3-6
 0.56 AZOLLA FILICULOIDES LAM 1-6
 0.56 MYRIOPHYLLUM VERTICILLA 1-6
 0.57 SPARGANIUM SIMPLEX HUDS 1-6
 0.57 HELODEA CANADENSIS RICH 4-6
 0.57 CALLITRICHE OBTUSANGULA 1-6
   0.57 RICCIA FLUITANS L.        1
   0.58 WOLFFIA ARRHIZA (L.) WI 1-6
 0.59 POTAMOGETON LUCENS L.   1-6
 0.59 NYMPHAEA ALBA L.        1-6
 0.59 HIPPURIS VULGARIS L.    1-6