is shortest in the north and loncest in the south. !-!ost of the 

 rain is convectional with a marked afternoon and evenin- Tnaximin. 

 Dirj winter weather is verj^ stable but intense thunderstorms occur 

 in suramer. In the seraiarid north, early rainy season winds asso- 

 ciated with thunderstorms bring dust storms or ho boobs. 



The Red Sea coast and the eastern slopes of the Red Sea Hills, 

 influenced by the Red Sea, have northerlies throughout the year. 

 These bring rain and clouds, rain falling chiefly in winter. The 

 higher relative humidity of this narrow coastal strip markedly 

 influences the flora and fauna of the area. 



FLORAL DISTRICTS 



The vegetation of the Sudan (Andrews 1%8) is divided into 

 seven principal Districts from north to south (Figure 326): 



1. Desert 



2. Acacia Desert Scrub 



3. Acacia Short Grass Scrub 

 A. Acacia Tall Grass Forest 



5. Broad-leaved Woodland and Forests 



6. Forests 



A. Gallery' Forests 



B. Bowl or Depression Forests 



C . Cloud Forests 



7. Sv/amps and Grasslands 



A. Permanent Swamps 



B. Seasonally Inundated Land 



C . Grassland 



D. Mountain Meadow 



Isolated areas unrelated to their immediate surroundings are 

 the Red Sea Hills (Erkowit) and Gebel Elba (southeastern Ep/pt 

 adjacent to the Sudan frontier and administered by the Sudan Gov- 

 ernment ) . 



The following brief abstract provides a generalized picture 

 of the chief floral aspects of the Sudan. For further details, 

 see Andre\;s (l%8) and various chapters in Tothill (19^8). 



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