VEGETABLE POWDERS 



459 



Fig. 159. QUASSIA. 



a. Wood fibers and medullary ray, tang. view. 



b. Wood fibers and med. ray, radial view. 



c. /. Crystal bearing cells. 



d. Large porous duct. 



e. Medullary ray with starch. 

 m g. Crystals and starch granules. 

 h. Wood fibers. 



