Metaphyta Lilium. 



175 



tyledons) flower again and again year after year. These 

 may therefore be termed perennial polycarpic plants. 



When ripe the fruit falls off, and by withering or de- 



FIG. 91. -DEVELOPMENT OF EMBRYO OF DICOTYLEDON. (Sachs.) 



/ 



The numbers indicate planes of division ; v, suspensor ; k, hypophysis ; 

 h 1 , cell formed from the hypophysis ; w, tissues of the embryonic root ; 

 s, stem ; c, c, cotyledons. 



hiscing allows the seeds to escape, or the fruit may dehisce 

 while still attached to the stem. The seeds germinate when 

 sown on a suitable soil under the proper conditions of heat 



