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GEOGRAPHICAL DISTRIBUTION 



IX. The Temperate Regions in Austral Africa. 



In the absence of seasons, the plants not exposed to severe cold ; 

 the climate uniform, but continental. At least three botanical regions 

 can be distinguished. Colored grey in the accompanying map. 



95. The Caffrarian or Natal Region. Including the extreme 

 Eastern portion of Austral Africa, as far as the botanical Tropic, in 

 perhaps the twenty-fourth parallel of S. latitude. 



96. The Extreme Southern, or the Table-mountain Region. Per- 

 haps including the whole Southern border of Austral Africa. 



97. The Nam AQUA Region. The basin of the Gariep or Orange 

 River, as far as the botanical Tropic, in perhaps the twenty-fourth 

 parallel of S. latitude. 



X. The Afro-Indian Adaptation. 



Prevailing over a vast extent of Tropical territory, in a broad belt 

 almost encircling the Globe. At least thirty-six botanical regions 

 can be distinguished. Colored red in the accompanying map. 



The six regions to be first mentioned form a separate subdivision ; 

 the climate throughout the year being decidedly warmer than on 

 the remainder of the earth's surface. 



98. The Region of the Cape Verd Islands. Unwooded, and ex- 

 posed to occasional long-continued drought. 



99. The Tropical Western, or the main African portion of the 

 Great Desert. From the botanical Tropic, or the twenty-seventh 

 parallel of N. latitude, to the sixteenth parallel, and from the Atlantic 

 to the vicinity of the Nile. 



100. The Nubian and Arabian portion of the Great Desert. 

 Continuous with the preceding region, so as to include both shores of 

 the Red Sea, and probably the principal part of Arabia. 



101. The Somali portion of the Great Desert. South of the pre- 

 ceding region ; and including East Africa as far as the Equator, also 

 the Island of Socotra, and the Southern extreme of Arabia. 



102. The Oman and Sinde portion of the Great Desert. Includ- 

 ing Oman or Eastern Arabia, the opposite shore of Beloochistan, as 

 far as the botanical Tropic, and extending Eastward to and beyond 

 the mouths of the Indus. 



103. The Region of Western and Central Hindostan. In great 



