CATALOGUE OP 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. (Sooker, Fl.) 



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



Pictou Co., KS. {McKay.) St. Lawrence 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, ISTorthumberland Co., Ont. {Macoun.) Nelson Eiver, Keewatin. 

 {B. Bell.) • 



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



P. lucens, 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. Ott.) 



(2440.) P. pr2elongUS, Wulfen.; Hook., Fl. IL, 172. 

 P. lucens, 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- 

 que Lake, N.B. {Fowler, Oat.) Woodstock, N.B. {Hay.) St. Stephen, 

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

 treal, 1821. {Br. Holmes.) Bay of Quinte, at Belleville; Weller's 

 Bay, Lake Ontario, and in deep water in the Eiver Trent, Seymour, 

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

 Kaministiqua, and in the lake expansions of Nipigon Eiver. {Macoun.) 

 Goulaife Eiver, Lake Superior. {B. Bell.) In the Athabasca Eiver, 

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

 ford and Shawnigan lakes, near Goldstream, Vancouver Island. 

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



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

 120 ; Hook., Fl. II., 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, Gat.) Becscie Eiver, Anticosti. {Macoun.) 

 Elvers of the north shore of the Gulf of St. Lawrence. (St. Cyr.) 

 Eividre 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 



