568 



BOTANY. 



the genetic relations) of the seven great divisions of plants, 

 so far as they can be shown upon a plane surface : 

 GamopetalcB. 



Choi'ipetalce. 



Monocotyledones. 



Apetalm. 



Dicotyledones. 



ANGIOSPEKM^E. 



GYMNOSPERM^E. 



.PHANERO- 

 GAMIA. 



PTERIDOPHYTA. 



BRYOPHYTA. 



CARPOPHYTA. 



OOPHYTA. 



ZYGOPHYTA. 



PROTOPHYTA. 



608. The Distribution of Plants in Time. If we bring 

 together what is yet known as to Fossil Botany (Phytopalae- 

 ontology), as has been done by Schimper,* we find that the 



* " Traite de Paleontologie Vegetale," par W. Ph. Schimper. Paris, 

 1869 to 1874. This work of three large octavo volumes (aggregating 

 2696 pp.) and a quarto atlas of 110 plates is a most valuable one for 

 the student of Phytopalseontology. 



