PLATE 30 
SOTOOT 0G 
a eS ee 
12OE EO 
—) 
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, 
