Biological Survey — Erie-Niagara Watershed 197 



Cyperacejae 



Scirpus americanus Pers. Shore Rush. 



Frequent in shallow water along sandy or gravelly shores. 

 Scirpus validus Vahl. Bulrush. 



In shallow water near mouth of Spicer creek and Gun creek, 

 on Grand island. 

 Scirpus acutus Muhl. Bulrush. 



Common in shallow water. About Strawberry island and Buck- 

 horn island; along the upper Niagara river; Dunkirk. 

 Eleocharis palustris (L.) R. & S. Spike Rush. 



Frequent in the emersed zone about Strawberry island and 

 Rattlesnake island. 

 Eleocharis palustris (L.) R. & S. var. vigens Bailey. Spike Rush. 



Forming extensive beds off the north end of Grand island. 



Lbmnaceae 



Lemna minor L. Duckweed. 



Rare in protected pools about Grand island. 

 Spirodela polyrhiza (L.) Schleid. Duckweed. 



Rare in protected pools about Grand island. 



POPTTEMIRIACEA E 



Pontederia cordata L. Pickerel weed. 



Infrequent where streams enter the Niagara river from Grand 

 island. 

 Heteranthera dubia Jacq. MacM. Mud Plantain. 



Frequent. Niagara river ; Buffalo harbor ; Dunkirk harbor, 



JUNCACEAE 



Juncus brachycephalus (Engelm.) Buch. Bog Rush. 

 In shallow water about Strawberry island. 



Ceratophyllaceae 



Ceratophyllum demersum L. Hornwort. 



Rare. Dunkirk harbor; mouth of Spicer creek, Grand island; 



Beaver island. 



Nymphaeaceae 



Nymphozanthus advena (Ait.) Fernald. Yellow Water-lily. 



In shallow water, near Grand island landing; mouth of Spicer 

 creek. 



Rajstunculaceae 



Ranunculus longirostris Godr. White water-buttercup. 

 Rare. Mouth of Spicer creek; Grand island landing. 



Haloragidaoeae 



Myriophyllum exalbescens Fernald. Water Milfoil. 

 In a shallow bay near Grand island landing. 



