FOSSIL FLORA. 



783 



Table showing the distribution of the Tertiary plants of the Yellowstone National Pari — Continued. 





Distribution 



in the Park. 



Distribution outside. 





Fort Union (Eocene). ^"'f 



Lamar Flora 

 (Miocene). 



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 X 



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 X 































141. Carpites pedtraculatus n.sp 













































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a The numbers refer to the beds in which the plants were found. 



b Up Cache Creek. 



GEOLOGICAL CONSIDERATION OF THE TERTIARY FLORA. 



Naturally the geological aspects of this fossil flora are considered as of 

 paramount importance, for it was to ascertain the bearing- of the plants on 

 the question of geological age that this investigation was undertaken. As 

 I have already pointed out under the section devoted to the biological 

 aspects of the flora (p. 775), a very large proportion of the plants were 

 found to be new to science, and therefore could have only limited value in 

 determining the age, but enough previously described forms were recog- 

 nized tu warrant certain deductions. It is the purpose to set these con- 

 clusions forth in this section. 



