266 BULLETIN 53, UNITED STATES NATIONAL MUSEUM. 



7049. Populus polymorpha Newberry. Type. 



Upper Eocene (Tert.). Bridge Creek, Crook County, 

 Oregon. 



Newberry, Mon. XXXV, U. vS. Geol. Surv., 1898, p. 50, pi. 46, fig. 4. 



^Quercus oregoniana. 



7051. Populus polymorpha Newberry. Type. 



Upper Eocene (Tert.). Bridge Creek, Crook County, 

 Oregon. 



Newberry, Mon. XXXV, U. S. Geol. Surv., 1898, p. 50, pi. 49, fig. 7. 



= Quercus pseudo-alnus. 



7047. Populus polymorpha Newberry. Type. 



7052. Upper Eocene (Tert.). Bridge Creek, Crook County, 

 7060. Oregon. 



Newberry, Mon. XXXV, U. S. Geol. Surv., 1898, p. 50, pi. 46, fig. 3; 

 pi. 47, fig. 4; pi. 49, fig. 4. 



= Betula heteromorpha. 



5386 Populus potomacensis Ward. Types, 



to Potomac (Low. Cret.). Near mouth of Doag Creek, Mount 



5388. Vernon, \^irginia. 



Ward, Fifteenth Ann. Rept. U. S. Geol. Surv., 1S95, p. 356, pi. 4, 

 figs. 1-3. 



5253. Populus ? problematica Knowlton. Type. 



5254. Earamie (Cret.). Head of Fir Canyon, eight miles east of 



Bozeman, Montana. 



Knowlton, Bull. No. 105, U. vS. Geol. Surv., 1894, p. 51, pi. 6 

 figs. 5, 6. 



201 Populus richardsoni Heer. Illustrated specimens. 



to Green River (Tert.). Elko Station, Nevada. 



203- Lesquereux, Rept. U. S. Geol. Surv. Terr., VII, Pt. II, 1878, p. 177, 



pi. 22, fig.s. 10-12. 



4082. Populus richardsoni Heer. Illustrated specimens. 



Fort Union (Tert.). Burns's Ranch, below Glendive 

 Montana. 

 Ward, Bull. No. 37, U. S. Geol. Surv., 1887, p. 23, pi. 8, fig. 6. 



226 Populus rotundifolia Newberry. Types, 



to Fort Union (Tert.). Fort Union, or mouth of the Yellow- 



228. .stone River, North Dakota. 



6970. Newberry, Proc. U. S. Nat. Mus., V, 1883, p. 506; Mon. XXXV, U. vS. 



Geol. vSurv., 1898, p. 51, pi. 29, figs. 1-4. 



See Populus cuneata. 



5231. Populus russelli Knowlton. Type. 



Miocene? (Tert.). Ellen.sburg, Washington. 



Knowlton, Bull. No. 108. U. S. Geol. Surv., 1893, p. 104. 



229. Populus smilacifolia Newberry. Type. 



Fort Union (Tert.). Fort Union, North Dakota. 



Newberry, Ann. Lvc Nat. Hist. N. Y., IX, 1868, p. 66; U. S. Geol. 

 Surv. Terr., Ills. Cret. and Tert. Plants, pi. 14, fig. 5; Mon. 

 XXXV, U. S. Geol. Surv., 1898, p. 53, pi. 29, fig. 5. 



