CATALOGUE OP CANADIAN PLANTS. 141 



(647.) P. fruticosa, Linn. Shrubby Cinque-foil. 



Common on the rocky margins of rivers and lakes from Labrador 

 and Newfoundland to the Pacific, and northward to the Arctic Sea. 

 Besides being frequent in Eastern Canada at low altitudes, it becomes 

 truly alpine in the Rocky Mountains and is found almost at the snow 

 line. Greenland. (Hook. Arct. PL) 



(648.) P. tridentata, Solander. 



Labrador and Newfoundland, Nova Scotia and New Brunswick, 

 Lower St. Lawrence, top of Beloeil Mountain, at Three Rivers, north 

 and south shores Lake Huron and Lake Superior, and westward 

 through the wooded country to the Rocky Mountains in the Peace 

 River Pass, and northward to Lat. 64. It seems to thrive equally well 

 on rocks or sand. (Macoun.) Greenland. (Hook. Arct. PL) 



(649.) P. Anscrina, Linn. Silver Weed. 



Very abundant along the eastern coast and on the margins of all 

 rivers and lakes throughout the interior and northward to the Arctic 

 Sea. (Macoun.) Greenland. (Hook. Arct. PL) 



Var. grandis, Lehm. Hook. Fl.'L, 189. 



Vancouver Island and Queen Charlotte Islands, and doubtless along 

 the coast of British Columbia. (Macoun & Dawson ) 



Var. Grcenlandica, Tratt. 



P. Anserina, var. Egedii, Torr. & Gray, Fl. I., 444. 

 Whale Fish Islands. (Parry.) 



(650.) P. Canadensis, Linn. 



P. pumila, Poir. Pursh, 354. 



Pictou and Halifax, N. S. (McKay.) Vicinity of Quebec ; St. 

 Hyacinthe, Q. (Brunei.) Abundant at Riviere du Loup, Q. (Thomas.) 

 Vicinity of Montreal. (McGrill Coll. Herb.) Very common on sandy 

 soil both in fields and open woods throughout Ontario to Lake Huron. 



Var. simplex, Torr. & Gray, Fl. I., 443. 

 P. simplex, Michx. Hook. Fl. 1, 193. 



Common in fields, N.B. (Fowler's Cat.) About Quebec City. (Shep- 

 pard. Abundant in damp woods at Amherstburg, Ont. (Macoun.) 



