LEAVES. 



71 



PLATE XXIX. 



pa, 



FIG. 39. Powdered Henna Leaves (x 240). 



en, Crystals of calcium oxalate. 

 ei, Lower epidermis. 

 en, Neural epidermis. 

 e'n' Epidermis of midrib. 

 ep, Epidermis of petiole. 

 es, Upper epidermis. 

 f, Lignified cells of larger veins. 

 ffv, Debris of midrib. 

 fp, Fibres from petiole. 

 men, Spongy parenchyma. 

 pa, p/a/, Palisade cells. 

 tn, Tracheids. 



