2g2 



ZONES AND REGIONS 



[Pt. Ill, Sect. I 



coalescent roots of epiphytic figs or species of Clusia forms often the 

 living coffin within which many a stately tree moulders away. 



Whilst the demand for light draws vegetation upwards, the need fo: 

 moisture draws it downwards. Where humidity is decreased, the con 

 formation of the woody plants becomes massive, the crowns of foliagi 



