THE THREE PHASES OF GROWTH. 415 



In the ripe seed "of the same plant we should find the embfyo in the form //. 

 Between v and w is now intercalated a mass of tissue, which is elongating, and 

 which subsequently forms the hypocotyledonary segment (A) of the shoot. The first 

 leaves, or cotyledons, cc, have grown considerably. Of the embryonal tissue, of 



F!G. BS4,— Diagram of the distribution of the various phases of growth in a dicotyledonous plant, 



which the entire embryo formerly consisted, there now remain only two portions, 

 separated from one another ; the upper one of these constitutes the growing-portion 

 of the future plumule, and the lower that of the radicle (w). 



In /// we have represented the same plant as in //, after the conclusion of 



