_ 11 _ VICIA. 



20. Growing Point of Root. Draw a longitudinal section through the tip of a root, 

 under both powers, to show : root-cap ; dermatogen ; periblem ; plerome. 



21. Origin of Lateral Roots. Sketch the demonstration slide of a transverse 

 section, showing the origin of a lateral root from the pericycle. 



22. Histology of Stem. Draw the prepared transverse section of a young stem, 

 showing : epidermis ; cortex ; endodermis ; pericycle fibres ; vascular bundles ; medullary 

 rays ; pith. 



