VEGETABLE POWDERS 



447 



Fig. 152. PODOPHYLLUM. 



a. Parenchyma with starch and crystals. 



6. Parenchyma, longitudinal view. 



c. Starch, simple, compound and aggregate. 



d. Aggregate crystals of calcium oxalate. 



e. Cork. 



/. Reticulate ducts and tracheids. 

 g. Spiral duct. 



