332 ’ The Botanical Gazette. [October, 
America to become our foremost paleobotanist. His great enthusi- 
asm soon made him familiar with our flora, and we need only to look 
at the work he has left us to get an idea of his talent and indomitable 
energy. His last, as well as his previous works are well fitted to stim- 
ulate our paleobotanists. As it will be impossible to give a complete 
teview of this voluminous work, we point out a few of its characteris- 
tic features, as shown in the original way, by the author himself. 
How full of interest, for instance, are the figured leaves of Lirio- 
dendron, illustrating the transition to ancestors with deeply lobed 
or even pinnatifid leaves, sometimes of gigantic size, but with the 
characteristic truncate apex, until another form appears with the ter- 
minal lobe preserved as in Z. semialatum. e comparison of these 
not been 
flora of North America is not at the present epoch, and h ght to this 
in past geological times, composed of foreign elements brow, ee 
continent by migration, but that it is indigenous; its types are 
