OATALOaUE OF CANADIAN PLANTS. 247 



295. BIDENS, Linn. (BUR-MARIGOLD.) 



(1155.) B. frondosa, Linii. Common Beggar-ticks. 



B. pilosa, Wiild. Holmes Herb. McGill College. 



Common in ditches and on moist, fertile soil, from Nova Scotia and 

 New Brunswick to the Saskatchewan. {Richardso7i.) 



(1156.) B. connata, Mnhl. Swamp Beggar-ticks. 



Swampy grounds and margins of rivers and ponds, from Nova Scotia 

 and New Bi-unswick throughout Quc])ec and Ontario to the Saskatche- 

 wan, at Cumberland House. (Michardson.) 



(1157.) B. cernua, Linn. Smaller Bur-marigold. 



Swamps and ditches, from Nova Scotia and New Brunswick through- 

 out Quebec and Ontario w^estward to the Saskatchewan and northward 

 to Hudson Bay. (^Richardson.) Very a1»uodaiit in marshes on the 

 upper part of Swan River and westward in the valleys of rivers to the 

 Rocky Mountains. {3Iacoun.) 



Var. elata, Torr. & Gray FI. II., 352. 

 B. chrysanthemoides, Hook. Fl. I., 314. 

 Straits of De Fuca, on the North- West coast. (Scolder.) 



(1158.) B. chrysanthemoides, Michx. (Ireater Bur-marigold. 



Swamps and mai'gins of shallow pools and in ditches. This species 

 is credited with the same range as the last in all the eastern part of 

 Canada, but is not recorded west of the Lake of the Woods. My im- 

 pression is that this is a more southern species than B. cernua, and 

 that the variety with four awns on the achonia should be placed with 

 B. cernua. All our western forms seem to be B. cernua. and it is prob- 

 able that our northern ones also are that species. 



(1159.) B. Beckii, Torr. 



In still water in rivers and lakes. In tlie St. Lawrence near Point 

 St. Charle.i, at Montreal. {Holmes.) Beauharnois Co., Q. (McGill 

 Coll. Herb.) Vicinity of Ottawa. (Fletcher Fl. Ott.) Railway Bay 

 near Prescott, also Doxey's Bay, Rideau River, four miles from Ottawa, 

 abundant. (BiUmjs.) River Trent above Heely Falls ; BayofQuinte, 

 above Flint's MilJ, Belleville ; also, Sydenham River above the 

 falls, near Owen Sound, Ont. (Macoun.) Niagara River above the 

 falls. (I) avid F. Bay.) Chippewa and Maiden, Ont. (Maclagan.) 



