37' 



ZONES AND REGIONS 



[Pt. Ill, Sect. I 



A. Senegal, and others). Prominent components are, moreover, Adansonia digitata 

 and Kigelia aethiopica, a tree up to 25 meters high and with a trunk 8 meters in girth. 

 Doom palms (species of Hyphaene) also appear in great numbers in many savannahs 

 (Fig. 199). Other trees of the East African savannah are : Dalbergia melanoxylon 

 (Papilionaceae-Dalbergieae), Poinciana elata (Caesalpiniaceae), Zizyphus mucronata 

 and Berchemia discolor (Rhamnaceae), species of Sterculia, Odina tomentosa and 



Fig. 200. Landscape in the llano with Capernicia tectorum, the latter in some cases 

 infested by an epiphytic Ficus. Venezuela. After Carl Sachs. 



Heeria insignis (Anacardiaceae), Combretum and Terminalia (Combretaceae) 

 Spathodea nilotica (Bignoniaceae), species of Strychnos. 



iii. SAVANNAH IN AMERICA. 



Humboldt, who gave the first description ^ of tropical grassland in con 

 nexion with the ' llanos ' of Venezuela, regarded the latter as immeasurabk 

 treeless plains of grassland. Not only I myself, who have seen onl)j 

 a small part of the llanos, but also Carl Sachs, who traversed them ir 

 several directions and frequently travelled over the same country a; 



' Humboldt, op. cit. 



