Chap. VI] EDAPHIC INFLUENCES IN THE TROPICS 389 



plants, which anchor themselves firmly by means of adventitious roots. 

 The most widely spread of these plants is Ipomoca Pes-caprae (I. biloba), 



FlG. 211. Sandy shore with shrubs and Pandanus sp. in German East Africa. From a photograph. 



which, in both the New and Old Worlds, is rarely absent from sandy 



