54 NEW YORK STATE MUSEUM 



TYPHACEAE 



Typha latifolia L. 

 Broad-leaved catiail 

 Swamps. Abundant. June. 



SPARGANIACEAE 



Sparganium eurycarpum Engelm. 



Broad- fniitcd hur reed 



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



Sparg-anium simplex Huds. 

 Simple-stcnimed l)nr reed 

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

 August. 



NAIADACEAE 



Potamogeton natans L. 

 Common floating pondwecd 

 Ponds and slow streams. Common. July-August. 



Potamogeton niittallii Cham. & Sch. 

 P. p e n n s y 1 y a n i (• 11 s Chn m . 

 NuttalVs pondivecd 

 Ponds and streams. Common. July- August. 



Potamogeton lonchites Tuckoi'm. 

 P. f 1 u i t a n s Roth 

 Long-leaved pondiceed 

 In the river. Frequent. July-October. 



Potamogeton perfoliatus L. 

 Clasping-leaved pondweed 

 In the river. Frequent. July-September. 



Potamogeton crispus L. 

 Curled-leaved pondweed 

 In the river. Infrequent. August. 



Potamogeton zosteraefolins Sebum. 

 Eelg7^ass pondweed 

 In the river. Frequent. July- August. 



Potamogeton pectinatns L. 

 Fennel-leaved pondiceed 

 In the river. Common. July- August. 



