77 



Pojmlus cuneata, Newb. 



Bib : Lat. Ex. Fl. XXXV, 41, PI. XXIX, f. 7 ; XXVIII, f. 2-i : Cret. and Tert. Fl., 1878. 



This somewhat rare species of poplar is known in the United States in only two localities, 

 the Fort Union group of the Yellowstone river, Montana and the Bad Lands of Dakota. The 

 first Canadian record was from the Red Deer river in 1897, and it has since then been 

 obtained by Lambe from both the Tranquille and the Tulameen rivers. 



Populus daphnogenoides f Ward. 



Bib : Trans. R.S.C., VIII, 1890 ; VIII, 1902, iv, 46 : U.S. Geol. Surv., Bull. 37, 1887, 20. 



The fragments referred to Populus daphnogenoides with some hesitation were first 

 obtained from the Similkameen river, by Sir William Dawson in 1890, and in 1902 Penhallow 

 observed fragments of similar leaves in collections from the Red Deer river. 



Populus genetrix, Newb. 



Bib: Lat. Ex. Fl. XXXV, 44, pi. XXVII, f 1: Geol. Sarv. Can., VII, 1894, 231 B: 

 Trans. R.S.O., III, 1885 ; IV, 1886, iv, 17. 



The only United States locality for Populus genetrix, as recorded by Newberry, is the 

 Fort Union group of the Yellowstone river, Montana. In Canada it is a much more abun- 

 dant species, being found at Coal brook, British Columbia, and in the Lignite Tertiary of 

 Porcupine creek, the Great valley and Souris river, and more recently at Quilchena. 



Populus hookeri, Heer. 



Bib : Geol. Surv. Can., N. Ser., VI, 1888-89 : Trans. R.S.C., VII, 1889, iv, 71 : Fl. Foss. 

 Arct. I, 1868, 137. 



Populus hookeri is an arctic species which, as yet, appears to have given evidence of only 

 a sparing extension south of Greenland. The only record is that of Sir William Dawson in 

 1 889, for the Eocene of Bear river, Mackenzie basin. 



Populus latior, A. Br. 



Bib : Fl. Tert. Helv. II, 11, pi. LIII, f. 1, o, 7, 8, 10, LIV, LV. LVI, LVII ; III, 173 : 

 Geol. Surv. Can., 1877-78, 186 B, 



The distribution of Populus latior appears to be confined to high latitudes, since it is not 

 known in the Tertiary of the United States, and its greatest southern extension is found on 

 the Similkameen river in British Columbia. From this locality it ranges northward to 

 Port Graham in Alaska. 



In the Canadian Tertiary it appears to be a somewhat abundant species, and many ot 

 the leaves found were preserved in a very perfect condition. It has so far been found at 

 Nine-mile creek on the Similkameen river, at the Horsefly river, and at the Tulameen. 

 The branch already described and found in the collection from the Horsefly may belong to 

 this species. 



