PLATE 30 



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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 

 vulgare, L.). 



3. Cross- section of the collenchyma of the outer angle of motherwort stem. 



