256 IN THE GUIANA FOREST. 



radical change in the economy of a vegetable to 

 alter its assimilative arrangements in such a manner 

 that it can be easily understood what enormous 

 efforts must have been put forth before this took 

 place. We believe that no great tree has succeeded 

 in a similar way in temperate climes, although a 

 few shrubs and herbaceous plants have been more 

 fortunate. 



