THE PLANT ECOLOGY OF DKAKENSBERG RANGE. 515 



ridges, spurs, and foothills, pi-ojecting more or less at right 

 angles to the main escarpment. The rivers and their tribu- 

 taries have cut their way down very steeply, leaving usually 

 sheer walls of rock at their upper ends and steep slopes 



Text-pig. 1. 



.Tussoch Veld 



^ Grey i a Scrub 



Prolea Veli 



River Bed with 

 „ Leiicosidea . 

 __^ Scrub 



Section tbrough a typical foothill of the Drakensberg escarpment, 

 sliowing the relationship of plant formation to the geological strata. 



where the valleys begin to broaden. In spite of the fact, 

 therefore, that the greatest portion of the main range faces 

 south-east, the exposures vary exceedingly and the climate, 

 soil conditions, and plant formations vary accordingly. 



This fact is well illustrated as one passes from Bei'gville 

 towards the Mont aux Sources up the great valley of the 

 Tugela. 



