102 FOSSIL FLORA OF THE ,TOHlS[ DAY BASIN, OREGON. [KVhh.204. 



C, EOLOGICIAL ( '< )NSn )K RATIONS. 



We now come to a consideration of th(> hearing- of the fossil flora on 

 the age of the beds involved. I took occasion to say in my report on 

 the plants obtained by the expeditions of the University of California, 

 under the charge of Dr. Merriam: ''In attempting to work out the 

 bearing of the plants above enumerated on the question of tlu^ age of 

 the beds it should not be overlooked that any conclusions drawn 

 might be quite different from what they would be were the whole 

 flora of each of the localities to be considered."" 1 added, liowever, 

 that the conclusions then expressed were "not likely to be greatly 

 modified by subsequent work." The truth of this prediction has 

 been satisfactorily confirmed, for after a full consideration of every 

 known species or form, from every known locality, no evidiMice was 

 forthcoming to modify the conclusions then expressed. In the follow- 

 ing pages the evidence on which these conclusions rest will be set 

 forth more fully than the space then at my disposal would permit. 



A reference to the table given on pages 89-92 shows that the bulk 

 of the flora of the John Day Basin has come from Cherry Creek, 

 Bridge Creek, and Van Horn's ranch and vicinity. Very few species 

 are common to two or more of these localities. The species found at 

 the several other scattered localities, as will be shown later, naturally 

 fall under one or another of these three. 



LOWER CLARNO BEDS. 

 CHERRY CREEK. 



The flora of Cherry Creek, to which may be added that from 

 Currant Creek, which is clearly the same horizon and only a short 

 distance away, comprises 22 forms, as follows: 



Lygodium Kaulfusii Heer. Ficus tenuinervis Lesq. 



Asplenium subsimplex (Lesq.) Kn. Magnolia lanceolata? Lesq. 



Pteris pseudo-pinnseformis Lesq. Magnolia Culveri Kn. 



*Lastrea Fischeri? Heer. Cinnamomum Dilleri Kn. 



*Equisetum oregonense Newb. *Rhamnus Cleburni var Lesq. 

 *.Salix Schimperi Lesq. Aralia digitata Ward. 



Juglans rugosa Lesq. Aralia sp. 



Juglans? Bendirei n. sp. *Cornus ferox? Unger. 



Hicoria? oregoniana n. sp. Diospyros alaskana Schimp. 



Quercus furcinervis americana Kn. *Phyllites wascoensis Lesq. 



Quercus sp. Phyllites sp. 



Of the forms above listed 2 are new to science, 3 are not named 

 specifically, while 6 (those marked with an asterisk) have not been 

 reported outside these beds, leaving 11 species, or exactly 50 per cent, 



aUniv. Cal., Bull. Dept. Geol., Vol. II, No. 9, p. 290. 



