80 FOSSIL FLORA OF THE JOHN DAY BASIN, OREGON. ["I'li • -iOl. 



The only specimen referred to this species lacks the upper portion. 

 It appears to have been about 5 cm. in length and nearly 3 cm. in 

 width, with a petiole 4 mm. long. The nervation is well shown in the 

 figure. 



I at tirst inclined to refer this to Sapindux ohtusifoll^is Lesq.," which 

 has been found southeast of Green River station, Wyoming, in beds 

 supposed to be " Washakie" in age, and also in the Fort ITnion ])eds 

 of Montana and North Dakota. It has about the same size and shape, 

 although perhaps rather elliptical than ovate. The principal differ- 

 ence is in the secondaries, these being more numerous at a lower angle 

 of divergence and less curved upward. The disposition of the nervilles 

 is much the same in both. However, these two species are close, and 

 possibly a series of specimens would show them to be identical. 



Locality. — Mascall beds. Van Horn's ranch, about 12 miles west of 

 Mount Vernon, Grant County, Oregon. Collected by Knowlton and 

 Merriam, July, 1901 (U. S. Nat. Mus., No. 8.538). 



Family 'RHAMNACE.E. 



Rhamnus Cleburni? Lesq. 



RHAMNrs Cleburni Lesq., Tert. Fl., p. 280, PI. LIII, figs. 1-3, 1878. 



The collections made by Merriam's expedition contain a single 

 ])roken specimen that ma}^ belong to this species, but it is only the 

 upper portion of the blade, and it is impossible to identify this speci- 

 men with certainty in the absence of the basal portion. It seems to be 

 this species, however. 



Locality. — Cherry Creek, Cook County, Oregon. Collected by 

 Merriam's expedition in 1900 (Mus. Univ. Cal., No. 180). 



Rhamnus Eridani linger. 



Rhamnus Eridani linger. Newberry, Later Extinct Floras, p. 118, PI. XLVIII, 

 fig. 7, 1898. 



Locality. — Bridge Creek, Grant County, Oi'egon. Collected by 

 Rev. Thomas Condon (U. S. Nat. Mus., No. 9103). 



Family TILIACE.E. 

 Grewia crenata (Linger) Heer. 



Grewia crenata (Linger) Heer, Fl. Tert. Helv., Vol. Ill, p. 42, PI. CIX, tigs. 12-21; 

 PI. CX, figs. 1-11, 1859; Ward, Types of the Laramie Flora, p. 85, PI. XXXIX, 

 fig. 1, 1887; Newberry, Later Extinct Floras, p. 120, PI. XLVI, fig. 2; PI. XLYII, 

 figs. 2, 3, 1898 (1899). 



Palmrus colombi Heer. Lesquereux, Proc. LI. S. Nat. Mus., Vol. XI, p. 16, 1888. 



GrefiDia crenata was first found in this area at Bridge Creek, and 

 the specimens figured by Newberry, as well as a number of others 



aTert. Fl., p. 266, PI. XLIX, figs. 8-11, 1878. 



