Biological Survey — Oswego Watershed 247 



C S Potamogeton lucens L. 



C S *Potamogeton Richarclsonii (Benn.) Rydb. 



C S Potamogeton bupleuroides Fernald. 



C S Potamogeton crispus L. 



C Potamogeton epihydrus Raf. var. cayugensis (Wiegand) Benn. 



C S Potamogeton compressus L. 



C S *Potamogeton Friesii Rupr. 



C S Potamogeton pusillus L. 



C S Potamogeton vaginatus Turcz. 



C S Potamogeton filiformis Pers. var. borealis. 



C S ^Potamogeton pectinatus L. 



C Potamogeton Robbinsii Oakes. 



C Ruppia maritima L. var. longipes Hags. Sea- or Ditch-grass. 



C S *Zannichellia palustris L. var. major (Boen.) Koch. Horned 



Pondweed. 

 C Najas marina L. Large Naiad. 

 C S *Najas flexilis (Willd.) Rostk. & Schmidt. Naiad. 



Alismaceae 

 CS Sagitt aria latifolia Willd. Arrow-head. 

 C S Sagittaria heterophylla Pursh. Arrow-head. 



Hydro charitaceae 

 C S *Elodea canadensis Michx. Water-weed. 

 C S *Vallisneria americana Michx. Eel-grass. 



Cyperaceae 

 C S Scirpus americanus Pers. Rush. 

 C S Scirpus validus Vahl. Bulrush. 

 C S Scirpus acutus Muhl. Bulrush. 



Araceae 

 C S Peltandra virginica (L.) Kunth. Arrow Arum. 



Lemnaceae 

 C S Spirodela polyrhiza (L.) Schleid. Duckweed. 

 C S Lemna trisulca L. Duckweed. 

 C S Lemna minor L. Duckweed. 

 C Wolffia columbiana Karst. 



Pontederiaceae 

 C S Pontederia cor data L. Pickerel weed. 

 C S Heteranthera dubia (Jacq.) MacM. Mud plantain. 



Ceratophyllaceae 

 C S *Ceratophyllum demersum L. Hornwort. 



Nymphaeaceae 

 C S Nymphozanthus ad vena (Ait.) Fernald. Yellow water-lily. 

 C Nymphaea odorata Ait. Sweet white water-lily. 

 C S Nymphaea tuberosa Paine. White water-lily. 

 C Nelumbo lutea (Willd.) Pers. Yellow nelumbo or lotus. 



