250 PLANT LIFE 



processes within the parent organism. Inci- 

 dentally, however, as the wing-like structure 

 dries up, its adaptedness for assisting dispersal 

 may become of inestimable value to the 

 species. 



The individual has its duty to itself, and 

 its own immediate success is measured by 

 the completeness with which it is adapted 

 to overcome the difficulties that beset it 

 difficulties that arise partly from within, and 

 partly also from without and so to emerge 

 victorious in the struggle for existence. But 

 unless it is so constructed as to launch a 

 successful posterity on the world, its race is 

 destined in the long run to perish, and " The 

 place thereof shall know it no more." 



