PLATE 30 





COLLENCHYMA CELLS 



1. Cross-section of a side column of the collenchyma of motherwort stem 

 (Leonurus cardiaca, L.). 



2. Cross-section of the collenchyma of horehound stem (Marrubium 

 vulgar e, L.). 



3. Cross-section of the collenchyma of the outer angle of mother-wort stem. 



