Potamogeton heterophyllus, Schreb. Various-leaved 

 Pondweed. 



In ponds and lakes from the Missouri river eastward. 



Potaniogetou perfoliatus Richardsoiiii, A. Bennet. 

 Clasping-leaved Potamogeton. 



Common in the Minnesota and Sioux Valleys. 



Potamogeton alpinus, Balbis. Northern Pondweed. 

 In the Sioux river near Brookings. 



Potamogetoii foliosus, Raf. L/eafy Pondweed. 



In ponds and streams throughout the state. 

 Potamogeton foliosus niagareiisis,(Tuckerm.)Morong. 



In the Sioux Valley. 



Potamogeton zosteraefolius, Schum. Ell-grass Pond- 

 weed. 



In the Sioux and James valleys. 

 Potamogeton Hillii, Morong. Hill's Pondweed. 



In the Sioux valley. 



Potamogeton pusillus, L. Small Pondweed. 



Common in ponds from the Missouri valley eastward. 



Potamogeton pectinatiis, L,. Fennel-leaved Pond- 

 weed. 



In lakes and streams throughout the state. 

 Potamogeton mariiius occidentals, Robbins. The 

 Western Pondweed. 

 In the Black Hills. 



Potamogatoii palustris, L. Swamp Patamogeton. 

 In shallow water in the Sioux Valley. 



Zaiiiehellia palustris, L. Zanichellia. 



In brackish pr fresh water ponds throughout the state. 



Kiippia occideiitalis, S. Wat. Western Ruppia. 



In a strongly alkaline pond in the Minnesota valley, 

 near Gary. 

 Naias flexilis, (Willd.) Rost & Schmidt. Slender Naias. 



In pounds and lakes throughout the state. 



