476 



MESOZOIC ERA— AGE OF REPTILES. 



Fig. 771. 



Fig. 772. 



Fig. 774. 



Figs. 771-775.— Plants of the Potomac Formation (after Fontaine): Conifers. 771. Baieropsis 

 foliosa. 772. Sequoia ambigua: a, Leafy branch; b, Cone. Dicotyledons. 773. Araliaephyllum. 

 obtusilobum, x §. 774. Hedercephyllum angulatum, x §. 775. Sassafras cretaceum, x §. 



