Pliotoiiiiii'o^i-iiplis of riottiiiicnl Stmlies. 



29 



38. TS. Roots of " Zea mals " Indian corn. 



Cortex. 



Bndodermis. 

 Wood elements. 

 Pith. 



Secondary roots 



39. T.S. Stem of ' Zea mais " Indian corn 



\:^-'>' ,' ->/ 



/'■•- V 



Epidermal tissue. 



Vascular bundle. 



Phloem of bundle. 

 Primary ground tissue. 



Bundle sheath, 

 l-'itted vessels. 

 Annular vessels. 



~-0'V 



