VEGETABLE POWDERS 



519 



Fig. 190. THEOBROMA. 



a. Epidermal cells of seed. 



b. Endosperm cells with fat and starch, longitudinal view. 



c. Trichomes. 



d. Mechanical cells of hull. 



e. Endosperm cells. 

 /. Parenchyma. 



g. Sclerenchyma, top view. 



h. Sclerenchyma cells, profile view. 



i. Spiral ducts which are abundant hi the shell tissue. 



j. Mucilaginous substance characteristic of shell tissue. 



