54 NEW YORK STATE MUSEUM 



TYPHACEAE 

 Typha latifolia L. 

 Broad-leaved cattail 

 Swamps. Abundant. June. 



SPARGANIACEAE 



Sparganium eurycarpum Engelm. 



Broad-fruited hur reed 



Marshes and borders of streams. Common. May-August. 



Sparganium simplex Huds. 

 Simple-stemmed hur reed 

 The same situations as the last, but less frequent. June- 

 August. 



NAIADACEAE 



Potamogeton natans L. 

 Common floating pondiveed 

 Ponds and slow streams. Common. July- August. 



Potamogeton nnttallii Cham. & ^ch. 

 P. pennsylvanicus Cham. 

 NuttalVs pondweed 

 Ponds and streams. Common. July- August. 



Potamogeton lonchites Tuckerm. 

 P. f 1 u i t a n s Roth 

 Long-leaved pondweed 

 In the river. Frequent. July-October. 



Potamogeton perfoliatus L. 



Clasping-leaved pondiveed 



In the river. Frequent. July- September. 



Potamogeton crispus L. 



Curled-leaved pondweed 



In the river. Infrequent. August. 



Potamogeton zosteraefolins Schum. 

 Eelgrass pondweed 

 In the river. Frequent. July- August. 



Potamogeton pectinatus L. 

 Fennel-leaved pondweed 

 In the river. Common. July- August. 



