VEGETABLE POWDERS 



505 



Fig. 183. STILLINGIA. 



a. Parenchyma with starch, crystals and some brown resin. 



b. Cork with reddish brown coloring matter. 



c. Bast fibers. 



d. Reticulate duct. 



e. Porous parenchyma, longitudinal view. 

 /. Tracheids. 



g. Starch and aggregate crystals of calcium oxalate. 



