CATALOGUE OF CANADIAN PLANTS. 85 



ward to the Pacific, where it becomes common in ponds and lakes on 

 Vancouver Island, near Victoria, Nanaimo, Qualicum and Alberni. 

 (Macoun.) Cumberland House on the Saskatchewan- {Hooker, Fl.) 



(2438.) P. lucens, Linn. ; Gray, Man. Ed. V., 487. 



Pictou Co., N.S. {McKay.) St. Lawi-ence Eiver, at Prescott, Ont. 

 (Billings.) Bay of Quinte, and in the mill pond at Stirling, and in 

 Elziver, Hastings Co. ; also in the still waters of the Trent Eiver, Sey- 

 mour, Northumberland Co., Ont. (Macoun.) Nelson Eiver, K'eewatin. 

 (E. Bell.) 



(2439.) P. Zizii, Mertens & Koch. 



P. Ivcens, var. minor, Nolte; Gray, Man. Ed. V., 488 ; Macoun, Cat, 

 No. 1734, var. minor. 



Apparently rare in Canada. Nation Eiver at Casselman, near 

 Ottawa ; Big Bushkong and other lakes up Gull Eiver, Victoria Co., 

 Ont. (Macoun.) Vicinity of Hamilton, Ont. (Buchan.) Meech's Lake, 

 near Chelsea, Q. (Fletcher, FL Off.) 



(2440.) P. praelongus, Wulfen.; Hook., Fl. IL, 172. 

 P. Iwens, Michx., Fl. I., 102; Pursh, Fl. 1. 120. 

 Not uncommon in deep water of lakes and' quiet rivers. Earltown 

 Lakes, Colchester Co., N.S. (McKay.) Bass Eiver, Kent Co. ; Tobi- 

 queLake, N.B. (-Fow/er, Cai.) "Woodstock, N.B. (flay.) St. Stephen, 

 N.B. ( Vroom.) St. Lawrence Eiver, near Point St. Charles, Mon- 

 treal, 18il. (Dr. Holmes.) Bay of Quinte, at Belleville; Weller's 

 Bay, Lake Ontario, and in deep water in the Eiver Trent, Seymoui', 

 Northumberland Co. ; abundant in Lake Superior, at the mouth of the 

 Kamini.sliqua, and in the lake expansions of Nipigon Eiver. (Macoun.) 

 Goulais Eiver, Lake Superior. (R. Bell.) In the Athabasca Eiver, 

 above Lake Athabasca, lat. 58° ; Lost Lake, near Cedar Hill, and Lang- 

 foi-d and Shawnigan lakes, near Goldstreani, Vancouver Island. 

 (Macoun.) English Eiver, north of the Saskatchewan. (Hooker, Fl.) 



(2441.) P. perfoliatus, Linn.; Michx., Fl. I., 101 ; Pursh, Fl. L, 

 120 ; Hook., Fl. IL, 172. 



Eather common in rivers and lakes throughout the country. Cow 

 Bay, Halifax Co., N.S. (Sommers, Cat.) Ponds and slow streams, 

 Norton, N.B. (Fowler, Cat.) Becscie Eiver, Anticosti. (Macoun.) 

 Eivei s of the north shore of the Gulf of St. Lawrence. {St. Cyr.) 

 Eivi^i-e du Loup, Q. (Thomas.) Eiver St. Pierre and at Three Elvers, Q. 

 1821. (Dr. Holmes.) Green's Creek, Ottawa; very rare, only once 

 collected. (Fletcher, Fl. Ott.) Abundant in the Bay of Quinte, and at 



