No. 436.] LOCALIZED STAGES IN PLANTS. 



leaves, Fig. 15-18, show the increase in the number of the teeth, 

 the migration of the greatest breadth to near the base of the 

 leaf, the cordate form of the base and the change in the tip as 



well as of the whole leaf in becoming more pointed. 



At the upper part of the flowering stalk the leaves decrease 

 in the number of teeth until the highest leaves are simple and 

 lanceolate, usually with a clasping base repeating in reverse 

 order of sequence stages seen in the seedling and young growth 

 of early spring, becoming even more simple. 



Artemisia stelleriana Bess. Fig. 1 9. 



