Merriam.1 



John Day Basin. 



3°9 



Ficus ? oregoniana Lesq. 

 Lauras n. sp. 

 Aralia whitneyi? Lesq. 

 Acer bendirei Lesq. 

 Acer dimorphum Lesq. 

 Acer n. sp. 



Sapindus obtusifolius Lesq. 

 Primus n. sp. 

 Prunus n. sp. 



Hydrangea bendirei (Ward). 



Marsilea Bendirei Ward, Sketch of Paleobotany, 5th Am. 



Rept. U. S. Geol. Surv., p. 446, 1883-84. 

 Povana Bendirei (Ward) Lesq., Proc. U. S. Nat. Mus., vol. xi, 

 p. 16, pi. viii, fig. 4, 1888. 

 "Gravel and tuff section, south side of East Fork Valley. Four 

 miles east of Dayville. [Locality 880.] 

 Carpinus grandis Unger. 



"The flora of Van Horn ranch [loc. 878] finds its greatest 

 affinity with the Auriferous gravels and allied floras of California 

 and is to be regarded as upper Miocene in age. 



"The locality four miles east of Dayville [loc. 880] is repre- 

 sented by a single species. A larger collection from this locality 

 will be needed before the age can be satisfactorily determined by 

 the plants." 



It is the plant and fish horizon of the lower Mascall which 

 Cope referred to the Amyzon beds. It was apparently supposed 

 to have the same relation to the John Day as the Clarno leaf beds 

 at Bridge Creek. 



Origin. — The numerous remains of plants and fish in the fine 

 white beds at Van Horn Ranch indicate lacustrine conditions 

 at this locality during the early portion of the period. Similar 

 leaf beds in the Crooked River region which have been described 

 to the writer possibly originated in the same way and at or near 

 the same time. 



In the upper part of the section at Cottonwood, the conditions 

 of deposition, so far as can be ascertained, seem to have been 

 similar to those under which the John Day was laid down. Should 



