ROOTS 



103 



tree trunks buttressed Ijy sncli roots wliicli extend out over 

 and beneath the surface, and divide the area al}out the tree 

 into a series of irreguhir chambers (see Fig. 100). Some- 



FlG. 99. A screw-pine (Pandatms), from the Indian Ocean region, eliowing the 

 prominent prop roots put out near the base. 



times a stem, either inclined or with a poorl}- devehiped 

 primary root system, puts out prop roots which support 

 it, as in the screw-pine (see Fig. 99). A notable case is 



