VEGETABLE POWDERS 



251 



Fig. 52. CALAMUS. 



a. Parenchyma with minute starch granules. 



b. Oil and resin bearing cells. 



c. Spiral duct. 



d. Outer parenchyma and epidermis. 



e. Parenchyma from near periphery. 

 /. Parenchyma as a. 



g. Reticulate ducts. 



