VEGETABLE POWDERS 



371 



Fig. 112. HYDRANGEA. 



a. Parenchyma with raphides. 



b. Parenchyma with larger raphides. 



c. Cork tissue. 



d. Traeheids. 



e. f. Acicular crystals. 

 g. Bast. 



h. Sclerenchymatous tracheids. 



