CATALOGUE OF CANADIAN PLANTS. 413 



(1894.) P. Virginianum, Linn. 



Thickets in rich soil; near Pictou, N.S. {McKay.) (?) Boucherville 

 Island, near Montreal, 1821. {Holmes.) Maiden and islands in Detroit 

 Eiver. {Maclagan) Shaded gravelly river flat, London, Ont. (Burgess.) 

 Creek three miles north of London. {Saunders.) Red Creek, near 

 Hamilton, Ont. {BucJian.) 



(1895.) P. arifolium, Linn. Halberd-leaved Tear-thumb. 



Low grounds, not common ; vicinity of Halifax, N.S. {Lyndsay.) (?) 

 Low grounds, Kouchibonguac, N.B. {Fowlers Cat.) Hopedale, N.B. 

 {Brittain.) Common at Eiviere-du-Louj), Q. {Thomas.) Swamps near 

 Ottawa. {Fletcher, Fl. Ott.) Vicinity of Hamilton. {Logie and Buchan.) 

 Low grounds, Chi23pewa, Ont. {Maclagan.) 



(1896.) P. sagittatum, Lhui. Arrow-leaved Tear-thumb. 



Low grounds and swamjjs, rather common, from JSTewfoundland, 

 Nova Scotia, New Brunswick, throughout Quebec and Ontario to the 

 Saskatchewan. It seems to be more abundant in beaver meadows in 

 northern Ontario than anywhere else. 



(189Y.) P. Convolvulus, Linn. Black Bindweed. 



A naturalized weed in cultivated fields extending from the Atlantic 

 to the Pacific. This species is frequently a great nuisance in jDotato- 

 fields, often covering many square yards of the surface. It has already 

 become a vile weed in Manitoba, and Mr. Fletcher makes the same 

 rej)ort from British Columbia. 



(1898.) P. cilinode, Michx. 



Very abundant in sandy pine-woods and other suitable localities from 

 Nova Scotia and New Brunswick, through Quebec and Ontario, and 

 northward to Hudson Bay and west to Lesser Slave Lake, near Peace 

 River. 



(1899.) P. dumetorum, Linn. Var. scandens, Gray. Climbing 



False Buckwheat. 



P. dumetorum,, Linn. Gray, Man. 375, 1856. 



P. .^candem, Pursh, Fl. I, 273. Cat. Holmes Herb. 16. 



Eather uncommon, climbing over shrubs in low rich soil, mostly in 

 river bottoms. Near Halifax, N.S. {Sommers.) Near Pictou, N.S. 

 {McKay.) In damp thickets climbing over bushes 8-12 feet high. 

 Norton, N.B. {Fowler's Cat.) Along the banks of the Eiviere-du-Loup, 

 Que. {Thomas.) Near Hallow ell's, Montreal, 1821. {Holmes.) At March 

 near Ottawa. {Fletcher Fl. Ott.) Beavermeadows, North Hastings, and 



