﻿BOTANICAL GAZETTE 



Investigation 



Sections from many varieties of the sweet potato were exam- 

 ined, but the present study is confined to the Yellow Jersey. 

 Although a comparative study was made of all stages of roots, from 



those showing no thickening whatsoever to the mature tuber, only 

 the young tubers are important, for through them alone may one 

 expect to be able to interpret the structure of the mature potato. 

 Fig. i represents a freehand section of a living root; but, with that 



