ORIGIN OF PLANTS. 229 



zation ; and, second, from his doctrine regarding the identity 

 of the British and Continental floras, that in the course of 

 subsequent development from these low forms, the process in 

 each of many widely-separated centres, — widely separated 

 both by space and time, — would be so nicely correspondent 

 with the process in all the others, that the same higher re- 

 cent forms would be matured in all. And to doctrines such 

 as these, the experience of all geologists, all phytologists, all 

 zoologists, is diametrically opposed. If these doctrines be 

 true, their sciences are false in their facts, and idle and un- 

 founded in their principles. 



