THE ANGIOSPERMAE : ROOTS 



795 



Dermatogen. 







Periblem . 



Plerome. 



Meristematic cells. 

 Calyptrogen . 



Calyptra . 





» 





Fig. 790. — Vicia faha. Longitudinal 

 section through the root apex 

 showing apical meristem, germinal 

 layers and root cap. 



'^ Endodermis 

 r ) ■/ ' '.', Pericyde 



Protoderm 



Initial meristem 

 Calyptrogen 



. Calyptra 



pic_ jgi.—Aucuba japotiica. Longitudinal section 

 through the root apex. 



