TliE FLORA. OF THE EARLY MESOZOIC. 



177 



As we ascend, Jiowever, in the Mesozoic, we find new 

 and higher types. Even within the Jurassic epoch, the 

 next in succession to the Trias, there are clear indica- 

 tions of tlie presence of the cndogens, in species allied to 





Fia. 6-i. — Jurassic vegetation. Cycads and pines. (After Saporta.) 



the screw-pines and grasses ; and the palms appear a 

 little later, while a few exogenous trees have left their 

 remains in the Lower Cretaceous, and in the Middle and 

 Upper Cretaceous these higher plants come in abund- 

 antly and in generic forms still extant, so that the dawn 

 of the modern flora belongs to the Middle and Upper 

 17 



