156 



LATEX 



it may be noted that the latex of starved plants becomes thin 

 and water}'. Moreover, the frequent association of these 



Fig. 79. — Row of Para-rubbcr trees (Hevca brasilicusis) on Gallev Beach 

 Estates, Ceylon. (Reproduced by permission of tlie proprietors of 

 the Indidrnbhcy Journal.) 



elements with the phloem, and the often intimate contact 

 between them and the assimilatory tissues, seem to indicate a 

 role in the transport of elaborated food-material. The by- 



