No. 14.] FLOWERING PLANTS AND FERNS. 43 



Potamogeton bupleuroides Fernald (like Bupleurum, the 



Thorough-wax) . 

 Potamogeton perfoliatiis Gray's Manual ed. 6 in part, not L. 



In ponds, streams and brackish waters. Occasional near 

 the coast, extending inland as far as East Windsor (Bissell). 

 July — Aug. 



X Potamogeton nitens Weber (shining). 



Rare. Old Saybrook, small pond near the Connecticut 

 River (Harger). This is apparently a hybrid between Potam- 

 ogeton heterophyllus and some other species, and is not known 

 to produce fruit. 



Potamogeton zosterifolius Schum. (having leaves like Zostera, 

 the Eel Grass). 

 Rare or occasional. Ponds and streams. July — Aug. 



Potamogeton Hillii Morong. 



Rare. Salisbun', in Twin Lakes (Bissell). July — Aug. 



Potamogeton obtusifolius ^lert. & Koch (blunt-leaved). 



Rare. Xewtovvn, in shallow water of a mill pond (Eames) . 

 July — Aug. 



Potamogeton Friesii Ruprecht. 



Potamogeton mucronatiis Gray's Manual ed. 6, not 

 Schrad. (?). 

 Rare. Southington, in pools (Andrews). July — Aug. 



Potamogeton pusillus L. (very small). 



Frequent. Ponds and slow streams. July — Sept. 

 Potamogeton pusillus L., var Sturrockii Benn. 



Rare. In ponds: Waterford (Graves), Lake Saltonstall 

 (O.D.Allen). July — Sept. 



Potamogeton lateralis Morong (lateral). 



Rare. Collected at Salisbury many years ago by Dr. J. 

 W. Robbins; not reported by any recent collector. July — 

 Aug. 



Potamogeton Vaseyi Robbins. 



Rare. Ponds and lakes: Lake Saltonstall (O. D. Allen, 

 J. A. Allen, Eames), Milford (Eames), Plymouth (J. K. 

 Goodrich). July — Aug, 



