520 Wisconsin Academy of Sciences, Arts, and Letters. 
Table 3 
Total Weigjit Collected and Percentage of Water of Each Species 
Species 
Weight 
Water, 
per cent 
Wet 
Dry 
Potamogeton zosterifolius . 
820 
126 
84.7 
P. pectinatus ..... 
11,315 
1,477 
87.0 
P. amplifolius ... 
10,360 
1,592 
84.6 
P. Richardsonii .. 
9,860 
1,517 
84.6 
P. lucens . 
1,035 
111 
89.3 
Heter anther a dubia . 
1,135 
124 
89.1 
Najas flexilis . 
3,445 
384 
88.9 
Vallisneria spiralis . 
31,400 
3,089 
90.2 
Ceratophyllum demersum . 
5,490 
444 
91.9 
Myriophyllum verticillatum . 
3,685 
448 
87.9 
Bcirpus lacustris . 
1,015 
206 
79.7 
Elodea canadensis .... 
20 
1 
95.0 
Ranunculus aquatilis . 
1,210 
MS 
90.3 
Nymphaea advena .... 
725 
73 
90.0 
Castalia odorata . 
1,500 
146 
90.3 
Lemna minor ... 
160 
7 
95.8 
Lemna trisulca . 
280 
29 
89.5 
Typha latifolia. . .... 
900 
94 
89.6 
Zizania aquatica .. 
850 
125 
85.3 
Chara crispa . 
4,295 
959 
77.7 
Cladophora glomerata . 
4,600 
505 
89.1 
88,875 
10,997 
Station 8... 
1,290 
169 
Station 26..... 
2,655 
301 
Total. 
92,820 
11,467 
Average 87.7 
Area from which collected.. 
56.6 
Averagp per sq m. 
1,640 
202 
Ail weights are recorded in grams, areas in square meters. 
