0.34 LEMNA GIBBA L.          5-6
   0.45 WOLFFIA ARRHIZA (L.) WI 1-6
 0.49 SPIRODELA POLYRRHIZA (L 3-6
 0.49 SPIRODELA POLYRRHIZA (L 1-6
 0.49 LEMNA MINOR L.          3-6
 0.49 AZOLLA FILICULOIDES LAM 1-6
 0.52 AZOLLA FILICULOIDES LAM 3-6
 0.54 LEMNA TRISULCA L.       4-6
   0.55 WOLFFIA ARRHIZA (L.) WI 5-6
 0.56 LEMNA TRISULCA L.       1-6
 0.57 LEMNA MINOR L.          1-6
 0.59 HYDROCHARIS MORSUS-RANA 4-6
 0.59 HYDROCHARIS MORSUS-RANA 1-6
 0.62 AZOLLA FILICULOIDES LAM 5-6
   0.63 SALVINIA NATANS (L.) AL 1-6
   0.70 SALVINIA NATANS (L.) AL 4-6
 0.70 CERATOPHYLLUM DEMERSUM  1-6
   0.71 RICCIOCARPUS NATANS (L.)  1
   0.72 POTAMOGETON COMPRESSUS  1-3
 0.72 UTRICULARIA VULGARIS L. 1-6
 0.73 CERATOPHYLLUM DEMERSUM  5-6
 0.74 UTRICULARIA VULGARIS L. 3-6
 0.74 HELODEA CANADENSIS RICH 1-6
 0.75 CALLITRICHE OBTUSANGULA 1-6
 0.75 CALLITRICHE OBTUSANGULA 3-6
   0.77 RICCIA FLUITANS L.        1
 0.77 POTAMOGETON CRISPUS L.  1-6
 0.77 HELODEA CANADENSIS RICH 4-6
 0.77 SAGITTARIA SAGITTIFOLIA 1-6
 0.77 HOTTONIA PALUSTRIS L.   3-6