» PRESIDENT S ADDRESS. 



plains and dry river valleys. The hills are covered with scrub 

 in which the Ijstervark bos (Lebcckia macracantlia) and Vaal 

 bos {Torclionanthus camplioratus) predominate. On the sandy 

 plains there are grass and Vaal Kameeldoorn, while the low- 

 lying valleys support a growth of " bralc " and xeropbytic 

 shrublets. 



12. TJie Kalahari Sand Veld. — A region of undulating sandy 

 plains and dunes, dry river beds and internal drainage. In some 

 places the plains support only a growth of brak plants, on others 

 grass and thorn trees, while the dunes are covered with coarse 

 grass and isolated Witgat trees. 



13. The Damaraland Thorn Veld. — A region of mountainous 

 country with a dry and arid appearance. The vegetation is 

 composed mainly of thorn bush and succulents, with a scanty 

 clothing of grass. 



14. The Kavieeldoorn Veld of Scuth Damaraland. — A region 

 of vast deep sandy plains which support a park-like growtli of 

 gigantic thorn trees, below which low thorn scrub and scanty 

 grass subsist. 



15. The South Western Veld. — A region of mountainous 

 character with a great variety of soil and climate, in which the 

 vegetation is composed mainly of sclerophyllous bush and 

 shrublets, with an abundance of bulbous and sedge-like plants 

 (Restiads). 



16. The Karroo. — A region of low-lying relief in the north, 

 but somewhat broken in the south by the Cape ranges, 

 characterised by dry river beds, shallow soils and rock-exposed 

 surfaces. The vegetation is composed mainly of succulents, 

 bulbous and tuberous plants. 



17. The Upper Karroo. — A region of wide plains broken by 

 table-topped hills and spitzkops, with dry river valleys, shallow- 

 soils and rocky surfaces. The vegetation is composed of 

 low-growing and scattered xerophytic shrublets. 



18. The Kokerboom Veld of Na7}iaqualand and BusJimanland. 

 —A region of vast arid plateaux and plains, dry river beds and 

 bare stony or sandy surfaces. The vegetation is scanty and 

 consists of isolated tufts of grass, stunted bushes and shrublets 

 on the plateaux and plains, and the Kokerboom (Aloe dicJiotoma) 

 and Giftboom (Euphorbia virosa) on the rocky hills. 



19. The Namib or Western Littoral Belt. — A region of 

 drifting and shifting sand dunes, of gravel plains and barren rock 

 surfaces. The vegetation is extremely scanty and consists of a 

 few grasses and succulents on the dunes and gravel plains, of 

 xerophytic shrubs and succulents on the rock surfaces, of the 

 Narras (Acanthosicyos horrida) and Tamarisk (Tamarix articnlata) 

 on the submerged river mouths and of the Aggenys Euphorbia 

 (E. gregaria) in the open valleys. 



