LEAVES. 



53 



PLATE XX. 



FIG. 30. Powdered Bearberry Leaves (x 240). 



cr, Prismatic crystals. 

 ei, Lower epidermis. 



en, Neural epidermis, 

 es, Upper epidermis. 



f, Fibrous cells, from midrib. 



f , Wood fibres, from small veins. 

 I, Bast. 



jm, Spongy parenchyma. 



pa, p'a', Palisade cells. 



tc, Crystal cells in rows. 



tf, Cortical tissue of midr 

 v, Vessels. 



