S.A. HKNOl'HVTA. 393 



where; tliere are, however, fewer conmiun species which are 

 absent elsewhere than is the case in the other regions; in other 

 words, its special conditions are less marked, and reflect them- 

 selves less in the flora than is the case in these other resjions, 



AnioHij common forms may be mentioned: — 



A. in forest coiuhtions ; 



S])S. I • 



In this as well as in the South-Western region certain species 

 or forms are said to be more or less constantly maritime, but 

 the elasticity of these is not (fully known yel, and such a name 

 as Hcd-ivigidium maritimum (CM.) Far. is rather a mi,snomer 

 for a moss found near Lydenburg, a hundred miles or more 

 inland. 



IV. Western and Centkal Rk(,io.\. — This extends from 

 the main watershed on the Drakensberg to the .\tlantic, embrac- 

 ing the Orange Free State, the Karroo, Namaqualand, and 

 Bechuanaland, all more or less flat and arid, devoid of forest, 

 and with rainfall usually less than 20 inches per annum — in some 

 parts less than an average of fi\e inches per anmmi. 



The West African Protectorate and the Western Transvaal 

 mostly belong here also. The species found in this region are 

 peculiarly xerophytic, and able to endure in some condition long 

 periods of extreme drought, even though more or less hygro- 

 phytic, where opportunity occurs elsewhere. 



Of genera i>eculiar to this class of locality may be men- 

 tioned : — 



Gigaspcrnium. Targionia. 



Goniomitrium. Grimaldia. 



B 



