8 FLORA OF BURLINGTON AND VICINITY 



NAJADACEAE. PONDWEED FAMILY 



NAJAS L. Naiad 



N. flexilis (Willd.) Rostk. & Schmidt. Ponds and slow streams; com- 

 mon. July-Sept. 



POTAMOGETON (Tourn.) L. Pondweed 



P. americainis C. & S. Mouth of Winooski River, (Grout and Tracy). 

 July, Aug. 



P. amplifolius Tuck. Large-leaved Pondweed. Shelburne Pond, 

 (Jones); Colchester, (Griffin). July, Aug. 



P. CRiSPus L. Malletts Bay, (Griffin). July, Aug. 



P. dimorphus Raf. Ponds and slow streams; frequent. July, Aug. 



P. epihj'drus Raf. Still or flowing water; frequent. July, Aug. 



P. foliosus Raf. Still or flowing water; rare. July, Aug. Burlington 

 and Colchester, (N. F. F.). 



P. Friesii Rupr. Shelburne Pond, (Pringle). Aug., Sept. 



P heterophyllus Schreb. Mouth of Winooski River, (Grout and Tracy, 

 Howe); Malletts Bay, (N. F. F.). July, Aug. Forma terrEstris 

 Schlecht. Exsiccated place, Burlington, (N. F. F.). 



I', natans L. Common Pondweed. Shelburne Pond, (Jones) ; Malletts 



Bay, (Griffin). July, Aug. 

 P. pectiiiatus L. Malletts Bay, (Griffin). July-Sept. 



P. perfollatus L. Slow streams and shallow waters of Lake Cham- 

 plain; frequent. Sept. 



P, praelougus Wulf. Shelburne Pond, (Pringle) ; Burlington, (N. P. 

 F.). July. 



P. pnsillus L. Malletts Bay, (Griffin). Aug. 



P. pnsillus L., var. Sturroekii Benn. Malletts Bay, (Griffin). Aug. 



P. Eichardsouii (Benn.) Rydb. Quiet waters; occasional. July, Aug. 

 Malletts Bay, (Griffin); Burlington, (N. F. F.). 



P. Eobbinsii Oakes. Shelburne Pond, (Jones). July, Aug. 

 P. zosterifolins Schum. Shelburne Pond, (Grout and Tracy, Jones) ; 

 Malletts Bay, (Griffin). July, Aug. 



