VEGETABLE POWDERS 



355 



o 



Fig. 104. GERANIUM. 



a. Parenchyma with starch and crystals. 



b. Aggregate crystals of calcium oxalate. 



c. Parenchyma, longitudinal view. 



d. Thick-walled porous parenchyma. 



e. Cork. 



/. Starch granules. 



g. Ducts and tracheids. 



