180 METASPERMAE OF THE MINNESOTA VALLEY. 



P. angulosa Michx. F1. N. Am. II, 243 (1803). 

 P. canndensis Michx. f. Hist. Arb. Ill, 302 (1819). 

 P. macrophylla Lodd. Cab. (1836). 

 Wats, and Coult., Gray's Man. 6 ed. 487; Britt., Fl. N. J. 227; Mac, 

 Fl. Can. I, 457; Upham, Fl. Minn. 131; Webb., Fl. Neb. 110; Chap., Fl. S. 

 St. 431; Coult., Fl. Colo. 339; Herd., Fl. Eur. Russ. 118; Wats., King. Exp. 

 327; Roth., Wheel. Exp. 242; Cov., Fl. Ark. 221; Engl. Pax, Nat. Pflanz. 

 Ill, 1, 3.5. 



Introduced into Russia. 



North America: Q., Ont. to Saskatchewan and Assin- 

 iboia and Rockies; S. to W. N. Eng., N. J. and Pla.; W. to 

 Colo., Kan., Ind. Terr, and Rocky mts. 



Minn, valley: Throughout; woods, shores of lakes and 

 banks of streams. 



Herb.: Taylor 40, Elysian; Sheldon 1580, Lake Ben- 

 ton; Taylor 632, Minnesota lake; Sheldon 449, Madison Lake, 

 Blue Earth Co. ; Holzinger 261, Winona Co. ; Oestlund 181, Hen- 

 nepin Co.; Sandberg 520, Cannon Palls; Herb. Wickersheim 226, 

 Lake Park, Becker Co. 



Populiis balsamifera Linn. Spec. 1034 (1753). 

 P. tacamalvica Mill. Diet. (1768'. 

 P. balsaviifera lanceolata Maksh. Arbust. 108(1785). 

 P. candicans Ait. Hort. Kew. Ill, 406 (1789). 

 P. viminea BoN. Jard. 565 (1845). 



P. halsamifem var. gemana Wesmael, DC. Prodr. XVI, 2, 329 

 (1868). 



Wats, and Coult., Gray's Man. 6 ed. 487; Britt., Fl. N. J. 227; Webb., 

 Fl. Neb. 110; Upham, Fl. Minn. 131; Coult., Fl. Colo. 339; Mac., Fl. Can. 

 I, 456; Herd., Fl. Eur. Russ. 118; Wats., King Exp. 327; Roth., Wheel. 

 Exp. 242; Engl. Pax, Nat. Pflanz. Ill, 1, 35; Hart., Fl. Scand. I, 567, 568; 

 Rothr., Alask. 454. 



Introduced in Russia and Scandinavia. 

 North America: Saskatchewan and Man. to Alaska 

 and Mackenzie; N. in Arctic circle; S. to N. Eng., N. J.. Mich., 

 Minn., Neb. and Colo. 



Minn, valley: N. W. edge and N. E. district; sparingly 

 represented; borders of streams and swamps. 



Herb. : Bailey 162, Vermilion lake; Sandberg 52 J, Can- 

 non Falls; Sandberg 622, Agate bay. 



Populus ^n-andideiitata Michx. PI. N. Am. H, 243 (1803). 

 p. yraudidentata var. pendula ToKit. Conip. Fl. N. St. 375(1824). 

 Wats, and Coult., Gray's Man. 6 ed. 486; Britt., Fl. N. J. 227; Upham, 

 Fl. Minn. 130; Mac, Fl. Can. 456; Chap., Fl. S. St. 431. 



North America: N. S., N. Br., Q., Ont. to N. Car.; W. 

 to N. Minn, and Tenn. 



