PLANTS. 



SERIES PHANEROGAMIA, 



CLASS DICOTYLEDONS. 



SUB-CLASS ANGIOSPERM.^. 



No. 532. Sassafras 

 cretaceum, Newb. 



Angiospermous plants 

 date from the Cretaceous, 

 and many genera are iden- 

 tical with those now liv- 

 ing. Our modern forest 

 trees are largely repre- 

 sented in the fresh-water 

 deposits of the interior re- 

 gion and in the cretaceous 

 clays of the Atlantic bor- 

 der. 



Dakota Group (Creta- 

 ceous), Ellsworth County, 

 Kansas. 



No. 533. Betulites Vestii, Lesq. 



Dakota Group (Cretaceous), Ellsworth County, Kansas. 



SUB-CLASS GYMNOSPERMJE. 

 FAMILY CONIFERiE. 



No. 534. [1332, Cast]. Pinites pseudo-stroboides, Gop. 



The genus Pinites — the ancient Pine Tree — was introduced upon the earth 

 much earlier than the other members of our present forest trees, and has been 

 persistent in its sojourn. This is attested by trunks, leaves and cones preserved 



