WIDGEONGRASS 

 (Ruppia maritima; includes 

 occidentalis and spiralis) 



Brackish and alkali water 

 inland from British Columbia 

 to Manitoba, California, Okla- 

 homa and Minnesota, and in 

 Missouri and New York; and 

 fresh and brackish water along 

 each coast. 



Resembles Sago Pondweed 

 but its leaves are in less- 

 bushy clusters; the sheathing 

 bases of the leaves have a 

 tiny, rounded, firm tip; and 

 each pear-shaped seed is on a 

 stalk by itself. 



SAGO PONDWEED 

 (Potamogeton pectinatus) 



Fresh and alkali 

 water inland from Alaska 

 to Quebec, California, 

 Texas and Florida; and 

 fresh and brackish water 

 along each coast. 



Resembles Widgeon- 

 grass but the leaves are 

 in bushier clusters; the 

 sheathing bases of the 

 leaves have a long, 

 tapering, flimsy tip; 

 and the roundish seeds 

 are stalkless. Resembles 

 Bigsheath Pondweed but 

 all the leaves have 

 narrow-sheathed bases and 

 the seeds have a pointed 

 tip. Resembles Thread- 

 leaf Pondweed but usually 

 has longer, more-branched 

 stems and larger seeds 

 (1/8 inch or more vs. a 

 little less than 1/8 

 inch) with a pointed tip. 

 Resembles Western Pond- 

 weed but the leaves are 

 much longer and narrower 

 and have narrower 

 sheaths. 



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