298 J. w. j^Ews. 



fig. 2). Triglochin sp., Eriocaulon sp., and Acros- 

 tic hum aureum are also associated. 



(4) BARRINGTONIA ASSOCIATION. 



Just above the lag-oonSj but in wet ground, which, however, 

 is more sandy in its nature and not brackish, we get a 

 Barringtonia association. It is found also at the mouths 

 of rivers which do not form mud swamps, 6.g. the Umgeni 

 and Umzinto. 



The following are the species composing it : 



Barringtonia racemosa. Hibiscus tiliaceus, Yoa 

 canga thouarsii, Eugenia cor data, and a pu.rple 

 climbing species of Ipom;ea. 



INLAND VEGETATION. 



Eastern South Africa as a whole belongs to the region of ever- 

 green dicotj'lous forest and grassland, and it differs from the 

 region of sclerophyllous woodland (Schimper) in having a 

 summer rainfall and dry Avinters. Parts of Natal — the lower 

 valley levels — are, however, much drier, and the combination 

 of various factors, such as less rainfall, exposure to hot winds 

 and soil conditions, bring'S about in these places an extreme!}' 

 xerophytic type of vegetation made up of various thorn 

 trees. Euphorbias, etc. 



BUSH. 



In the coast belt behind the sand-dunes much of the bush 

 has been cut down to make way for tea and sugar plantations, 

 but the composition of the type is given below : 



