220 BOTANY. 



Other modifications occur as in the pitcher plant, insectivor- 

 ous plants, etc. 



362. The root shows less modification. Besides normal 

 roots, which are fibrous in most small plants and stout in the 

 larger ones, some of the modifications are found in fleshy roots, 

 where nourishment is stored (ex., dahlia, sweet potato, etc.); 

 aerial roots (ex., poison ivy, the twining form), aerial orchids, 

 etc. 



