WHITESTEM PONDWEED 

 (Potamogeton praelongus) 



Alaska to New- 

 foundland, California, 

 Indiana and New Jersey. 



Upper part of 

 stems is usually zig- 

 zag. Leaves are long- 

 oblong and sometimes 

 puckered. They have a 

 slightly notched base 

 and usually a hooded 

 tip that splits a 

 little way back when 

 it is flattened. The 

 sharp-backed seeds are 

 about 1/4 inch long. 



Resembles Redhead- 

 grass but has larger 

 leaves with only 

 slightly notched base, 

 long-stalked seed heads 

 and larger seeds. 



CURLY PONDWEED 

 (Potamogeton crispus) 



Here and there in 

 Alberta; California to Colo- 

 rado and Arizona; and South 

 Dakota to Quebec, Oklahoma 

 and Alabama. A native of 

 the eastern hemisphere and 

 still spreading in North 

 America. 



Leaves have finely 

 toothed, usually closely 

 puckered, edges. They have 

 a slightly notched base and 

 a very blunt tip. 



15 



