THE ANGIOSPERMAE : ROOTS 



813 



Fig. 808. — Oenanthe crocata. 

 Root tubers. 



Fig. 809. — Beta vulgaris show- 

 ing the swollen storage organ 

 partly derived from the root 

 and partly from the base of 

 the stem. 



Phloem 



Xylem 



5.,^- ■ J:.A ^ " 



Fig. Sic. — Clwyidrodendron tomentosum. 

 Transverse section of the root show- 

 ing concentric rings of vascular 

 tissue which are only partly 

 lignified. 



