176 ^CATALOGUE OF THE CRETACEOUS AND [bull. 152. 
Populus balsamoides exiniia (Gopp.) Lx. Cret. and Tert. FL, p. 226, 
pi. xlviA, f. 10, 1883. 
Populus eximia Gopp. Tert. Fl. v. Schossuitz, p. 23, 1855. 
Fort Union group : Bad Lands, Dakota. 
Populus balsamoides? Gopp., var. latifolia Lx. Cret. and Tert. Fl., 
p. 158, pi. xxxi, f. 4, 1883. 
Green River group : Florissant, Colorado. 
Populus Berggreni Heer. Ofversigt. K.Yetenskaps Akad. ForhandL, 
1871, p. 1183, 1871; Lx., Fl. Dak. Gr., p. 42, pi. viii, f. 2-4, 1891. 
Dakota group: Kansas; New Ulm, Minnesota. 
Populus cordata Newby. Later Extinct Floras, p. 60, 1868 ; 111. Cret. 
and Tert. PL, pi. xiv, f. 6, 1878. 
Fort Union group : Yellowstone River, Montana. 
Populus cordifolia Newby. Later Extinct Floras, p. 18, 1868; Dn., 
Trans. Roy. Soc. Canada, vol. iii, sec. iv, p. 17, 1885 [1886]. 
Dakota group : Nebraska. 
Upper Laramie group : Canada. 
Populus craspedodroma Ward. Bull. U. S. Geol. Surv., no. 37, p. 
21, pi. viii, f. 3, 1887. 
Fort Union group : Clear Creek, Montana. 
Populus cuneata Newby. Later Extinct Floras, p. 64, 1868 ; 111. Cret. 
and Tert. PL, pi. xiv, f. 1-4, 1878. 
Fort Union group: Yellowstone River, Montana; Bad Lands, 
Dakota. 
Populus cyclophylla Heer=Populites cyclophyllus. 
Populus daphnogenoides Ward. Bull. U. S. Geol. Surv.. no. 37, p. 20. 
pi. vii, f. 4-6, 1887. 
Fort Union group : Seven-Mile Creek, Montana. 
Eocene?: Similkameen Yalley, British Columbia. 
Populus? Debeyana Heer=Juglans Debeyana. 
Populus decipiens Lx. = Populus arctica. 
Populus denticulata Heer. Fl. Foss. Arct., vol. vii, p. 20, pi. Iv, f. 5, 
1883; Lesquereux, Proc. U. S. Nat. Mus., vol. x, p. 40, 1887. 
: Upper Kanab Yalley, Utah. 
Populus elliptica Newby. Later Extiuct Floras, p. 16, 1868. 
Dakota group : Blackbird Hill, Nebraska. 
Populus eotremuloides Kn. Eighteenth Ann. Rept. U. S. Geol. 
Surv., pt. iii, p. 725, pi. c, f. 1, 2; ci, f. 1, 2, 1898. 
Payette formation : Marsh, Idaho. 
Populus flabellum Newby. Bost. Journ. Nat. Hist., vol. vii, p. 524, 
1863. 
: Bellingham Bay, Washington. 
Populus genatrix Newby. Later Extinct Floras, p. 64, 1868; Dn., 
Trans. Roy. Soc, Canada, vol. iii, sec. iv, p. 17, 1885 [1886]. 
Fort Union group: Yellowstone River, Montana. 
Canadian upper Laramie: North Saskatchewan; Souris River, 
Great Yalley; Canada. 
