60 



ECONOMIC BOTANY OF ALABAMA. 



LIST OF TREES— Continued. 



There is a marked difference between this hst of trees 

 and that for the Tennessee valley, especially when the 

 percentages of abundance are taken into consideration. 

 It is interesting to note that some of the trees that grow 

 on the poorest soils in the valley are common on the 

 plateau, and some of those common in the valley are con- 

 fined to the richest soils on the plateau, all of which is 



