180 METASPERMAE OF THE MINNESOTA VALLEY. 
P. angulosa Micux. Fl. N. Am. II, 243 (1803). 
P. canadensis Micux. f. Hist. Arb. III, 302 (1819). 
P. macrophylla Lopp. 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. 
ITI, 1, 35. 
Introduced into Russia. 
North America: Q., Ont. to Saskatchewan and Assin- 
iboia and Rockies; 8S. to W. N. Eng., N. J. and Fla.; W. to 
Colo., Kan., Ind. Terr. and Rocky mts. 
Minn. valley: Throughout; woods, shores of lakes and 
vanks of streams. 
HeERsB.: Taylor 40, Elysian; Sheldon 1580, Lake Ben- 
ton; Taylor 632, Minnesota lake; Sheldon 449, Madison Lake, 
Blue Harth Co.; Holzinger 261, Winona Co.; Oestlund 181, Hen- 
nepin Co.; Sandberg 520, Cannon Falls; Herb. Wickersheim 226, 
Lake Park, Becker Co. 
Populus balsamifera Linn. Spec. 1034 (1753). 
P. tacamahaca Mibu. Dict. (1768). 
P. balsamifera lunceolata MarsH. Arbust. 108 (1785). 
P. candicans A1T. Hort. Kew. III, 406 (1789). 
P. viminea Bon. Jard. 565 (1845). 
P. balsamifera var. genuna WESMAEL, DC. Prodr. XVI, 2, 329 
41868). 
Wats. and Coult., Gray’s Man. 6 ed. 487; Britt., Fl. N. J. 227; Webb., 
¥1. 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. III, 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/, Can- 
non Falls; Sandberg 522, Agate bay. 
Populus grandidentata Micux. Fl. N. Am. II, 243 (18038). 
P. grandidentata var. pendula Torr. Comp. I'l. N. St. 375 (1824). 
Wats. and Coult., Gray’s Man. 6 ed. 486; Britt., Fl. N. J. 227; Upham, 
1. 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. 
