BIGLEAF PONDWEED (Potamogeton amplifolius) 



British Columbia to Montana and California; and 

 North Dakota to Newfoundland, Oklahoma and Georgia, 



Underwater leaves are strongly arched lengthwise. 

 Sometimes there are no floating leaves (see page 17). 



Resembles Illinois Pondweed but the underwater 

 leaves are much more strongly arched and are always 

 stalked. 



