04 FOSSIL FLORA OF THK JOHN DAY BASIN, OREGON. [bull. 20 J. 



in the tips of tiic lobes. Each is provided with numerous secondary 

 branches, and from the larger size of some it is presumed that they 

 supplied lateral lobes. The finer nervation is that of Liquidambar. 



LiKitlitij. — White hill one-half mile east of original Van Horn's 

 ranch localit3\ Collected b}- Knowlton and Merriam, July, 1901 

 (U. S. Nat. Mus., No. 8545). ^ 



Family PLATAN ACExE. 

 Platanus aspera Newb. 



Platanus aspera Newb., Pnx-. X . 8. Nat. Mua., Vol. V, p. 509, 1883; Later Extinct 

 Floras, p. 102, PI. XLII, fig,-. 1-3; PL XLIV, %. 5; PI. LIX, fig. 3, 1898. 



The types c)f this species are before me, together with a number of 

 more or less fragmentary examples collected later. They exhibit 

 nothing to modify the views originall}^ expressed by Newberry. 



Locality. — Bridge Creek, Grant County, Oregon. Collected bj'^ 

 Rev. Thomas Condon (U. S. Nat. Mus., Nos. 7079, 7081, 7082, 7083) 

 and Maj. Charles E. Bendire (U. S. Nat. Mus., No. 3010). 



Platanus Condoni (Newb.) Knowlton. 



Platanus Condoni (Newb.) Knowlton in Merriam, Univ. Cal., Bull. De{)t. Geo!., 



Vol. II, No. 9, p. 289, 1901. 

 Ficus? Condoni Newb., Proc. U. 8. Nat. Mus., Vol. V, p. 512, 1883; Later Extinct Floras, 



p. 85, Vol. LVI, fig. 1; PL LVIII, fig. 1, 1898. 



The following conclusions are based on all of the original types of 

 Newberry, together with a considerable number more recently col- 

 lected, which have passed through Lesquereux's hands. Newberry, 

 as evidenced by the question mark placed after the genus as well as 

 the discussion in the Later Extinct Floras, was in doubt as to the ref- 

 erence of these tine leaves to the genus Ficus, and Lesquereux 

 referred them without hesitation to Platan m hasilohata. That it 

 should be placed in the genus Platanus is certain, but that it should be 

 referred to Professor Ward's species is not quite so clear. After a 

 caref id examination of the types of Platanus hasilohata and consultation 

 with their author, I can but conclude that, although close, there are 

 sufficient difi'erences to warrant keeping them apart, at least for the 

 present. The basal lol>es in P. hasilohata are uniformly larger, and in 

 most cases several times the size of those in the form under discus- 

 sion, and, moreover, they appear to be always deeply lobed in the 

 former and entire in the latter. Assuming that the evolutional ten- 

 dency is to get rid of these large stipular organs, as suggested in the 

 living P. ocrldriitalls, the Bridge Creek form would represent a more 

 recent and higher developed stage than 1\ hasilohata, a supposition 



