CRETACEOUS PLANTS. 



475 



Fig. 



Fig. 769. 



Fig. 770. 



Figs. 766-770.— Cretaceous Plants, Dakota Group (after Lesquereux): 766. Sassafras Mudsei. 

 767. Sassafras araliopsis. 768. Salix protesefolia. 769. Fagus polyclada. 770. Protophyllum 

 quadratum. All reduced. 



ern. Nearly all the genera of our modern trees are present, e. g., Oaks, 

 Maples, Willows, Sassafras, Dogivood, Hickory, Beech, Poplar, Tulip- 

 tree (Liriodendron), Walnut, Sycamore, Siveet-gum (Liquidambar), 

 Laurel, Myrtle, Fig, etc. Out of 213 species of plants found in the 

 Dakota group, about 180 species are Dicotyls (Ward) and at least half 

 of these belong to living genera (Lesquereux). And if we include 



