CATALOGUE OF CANADIAN PLANTS. 19 



Ste. Marie. Quesnel, B.C. (Macoun.) Iforth shore of Lake Superior. 

 {Agassiz.) Rare. 



(38.) R. sceleratus, Linn. Noxious Buttercup. 



In ditches and muddy pools. St. Stephen, Shediac and Eiver Charlo 

 N. B. (Fowler's Cat.) Gaspe and Point Levis, Q. (Macoun.) Beloeil 

 Mountain, Q. (J. Bell.) Vicinity of Montreal. (McGill Coll. Herb.) 

 Very common in Ontario and in ponds on the Great Plains by Peace 

 Eiver to British Columbia. (Macoun.) Slave Lake and North to Lat. 

 67°. (Bichardson.) 



(39.) R. recurvatus, Poir. Hooked Buttercup. 



Eich, damp woods. Labrador. (Pursh.) Pictou, N.S. [McKay.) 

 Shaded brook at Bass Eiver, Kent Co., N.B. (Fowler's Gat.) Beaumont, 

 Saint Joachim, Pied du Cap Toui-monte, Q. (Brunei.) Montreal Moun- 

 tain and Eastern Townships, frequent. (McGill Coll. Serb.) Vicinity 

 of Ottawa. (Fletcher Fl. Ott.) Prescott, Ont. (Billings.) More abun- 

 dant westward throughout Ontario and disappearing at the Lake of the 

 "Woods. (Macoun.) 



(40.) R. pygmseus, Wahl. Diminutive Crowfoot. 



E. SaUnii, E. Br. Hook. Fl. I.. 17. 



Labrador. (Pursh.) Moist, grassy places on the higher pai-ts of the 

 Eocky Mountains, in Lat. 55°. (Drummond.) Melville Island and 

 shore of the Arctic Sea from Long. 1*70° to the mouth of the Copper- 

 mine Eiver. (Bichardson.) Top of Mount Selwyn, Peace Eiver Pass, 

 Lat. 56°. (Macoun.) Eocky Mountains near the 49th parallel, 6,000 

 feet altitude. (Dawson.) Kotzebue Sound. (Bothr. Alash.) West 

 Greenland. (Hook. Arct. PI.) 



(41.) R. Lapponicus, Linn. Lapland Crowfoot. 



Mossy woods in the eastern and central districts and from Lat 50° to 

 the Arctic Sea. (Bichardson.) Mountain swamps, eastern declivity of 

 the Eocky Mountains, Lat. 52°-5'7°. (Drummond.) Mossy swamps 

 along the base of the Porcupine Mountains, Mftn., swamp near St. Albert 

 at Edmonton, N. W. T., swamps along Little Slave Lake, N. W. T., and 

 in numerous swamps in northern British Columbia. (Macoun.) Whale 

 Islands in the Arctic Sea. (Boss.) Kotzebue Sound. (Bothr. Alask.) 

 Greenland. (Hook. Arct. PL) In the spring of 1881 the Eev. J. K. 

 Macmorine pointed out to me a few specimens growing in a little 

 swamp within the limits of the town of Prince Arthur's Landing, 

 Thunder Bay ; this seems to be its most southern limit. 



