A new Celtis from the western Miocene 



Edward W. Berry 



During the study of Miocene plants from Washington and 

 Idaho I happened upon a small collection of beautifully pre- 

 served Miocene plants which were presented to the U. S. Na- 

 tional Museum (Accession 66310. U. S. Geological Survey Lo- 

 cality 7475) in 1921 by Mr. Sam Ballantyne, and coming from 

 the Ballantyne ranch in Section 27, Township 23 south, Range 

 45 east, Willamette meridian, Malheur County, Oregon. 



The matrix is a fine grained lithified tuff with ferruginized 

 bedding surfaces on which the impressions occur. Eleven spe- 

 cies of plants are represented, as well as the incomplete skeleton 

 of the small fish — Leuciscus — whose scales, spines and bones 

 are widely distributed in Washington, Idaho and Nevada in the 

 Latah and Esmeralda formations. 



The plants are the following: 



Acer chaneyi Knowlton 



Amelanchier typica Lesquereux 



Castanea orientalis Chaney 



Celtis, n. sp. 



Odostemon simplex (Newberry) Cockerell 



Pinus sp., Knowlton (3 needle fascicles) 



Platanus dissecta Lesquereux 



Quercus idahoensis Knowlton 



Quercus simulata Knowlton 



Quercus treleasii Berry 



Typha lesquereuxi Cockerell 



The most abundant forms are Platanus dissecta and Quercus 

 simulata. All of the eleven except the new species of Celtis, 

 which it is the purpose of this note to describe, are found at 

 numerous other Miocene outcrops in Oregon or surrounding 

 states. Two occur at Florissant, Colorado; two in the Esmeralda 

 formation of Nevada, one in the Eagle Creek formation; three 

 in the Bridge Creek beds; one in the Mascall beds, three in the 

 Payette formation of Idaho; and seven of the 11 species in the 

 Latah formation of Washington. 



The available evidence indicates that the age is definitely 

 younger than the Bridge Creek horizon which Chaney has 

 found to be so extensively developed in Oregon, northeastern 

 California and northwestern Nevada. I regard it as late Miocene. 



The new species of Celtis may be described as follows: 



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