loams. While acacia trees are still outstanding, Combretaceous 

 and other broad leaf trees are scattered among them, in some 

 places quite thickly and with r^round cover not seen to the north. 

 The species of Acacia also differ in part fror.i those northwards. 

 A large number of floral associations are described by Anderson 

 (loc. cit . ) from this District. This is the area of vast migra- 

 tions of domestic animals from May to September during the rainy 

 season. 



5. Broad-leaved Woodland and Forest District 



This red ironstone area, with forty to sixty inches of rain- 

 fall annually, supports grassy woodlands of varyin^ characterxa- 

 tics, swamps, toich, and luxuriant tropical forests. From Yei 

 westward we find the most extensively forested area of the Sudan. 

 In this area of high elephant grass woodlands, depression and 

 gallery forests are interspersed with forested grasslands and 

 low mountains and hills. Northwards from the Congo watershed 

 the trees become shorter but much varied in species and density. 

 Extensive swamps and important dense, higliland forest areas oc- 

 cupy part of the ea^t bank. Gradually, from Yei to near Kapoeta, 

 the grassy plains lose their forest aspect and become more open. 

 Thorny acacias are scattered on the plains and broad leaf trees 

 are confined to patches surrounding termite mounds and fringes 

 bordering streams. 



From Kapoeta eastwards less rain falls and an outlier of 

 the Acacia Short Grass Scrub District takes over. 



6. Forest Districts 



A. Gallery Forests fringe larger streams in the previous 

 District and are most highly developed in the Yarabio and Yei 

 areas. In eastern Equatoria these forests are restricted to 

 streams at the base of mountains and to mountain ravines. Or 

 smaller streams the forest is only a single ranked fringe; 

 downstream it consists of heavier gallery forest trees in wider 

 ranks that form a close canopy and provide rain forest condi- 

 tions. 



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