508 J. W. BKWS. 



dominant, but small clumps of Panicum, Digitaria, or 

 Chi oris are found. They are, however, more abundant in 

 the Andropogon associations than in the Anthistiria. 

 This is still more the case with the other associated plants. 

 They are much more abundant on the slopes. In certain 

 places they oust the grasses altogether, and become dominant 

 themselves. In such cases, however, there is every indication 

 that the natural vegetation is bush, and the bush has been 

 destroyed. 



The Andropogon associations, occupying the more 

 uneven ground, are sometimes surrounded by the Anthi- 

 stiria associations ; but frequently they are transitional to 

 other formations. As already pointed out they are transi- 

 tional to the vleis, in fact the tambootie association is itself 

 the driest type of vlei. 



The Andropogon associations are also transitional to the 

 bush. The actual succession will be described later under 

 that heading. 



Finally, the Andropogon associations are intermediate 

 between high veld and low veld. As one passes down from 

 the Anthistiria association of the high veld, the associated 

 plants increase, and the Anthistiria association becomes 

 more and more mixed, until the Andropogon species are 

 dominant. At the foot of the slopes, transitional to the low 

 veld, the species of Andropogon which are found in the 

 low veld become the most abundant (Andropogon hirtus, 

 Andropogon pertusus, Andropogon schoenanthus 

 var, versicolor). As soon as the low veld itself is 

 reached, Anthistiria imberbis (low veld variety) is again 

 the dominant grass. 



(2) Changed High Veld. 



As a result of man's interference we find certain changes, 

 which must be noticed next. 



(a) Aristida junciformis dominant. Over wide 

 stretches, both on the more level ground and on the slopes. 



