VEGETABLE POWDERS 



493 



Fig. 176. ALEXANDRIA AND INDIA SENNAS. 



a. Lower epidermis of India senna. 



6. Epidermis of Alexandria senna. 



c, d. Epidermis, lateral view. 



e. Trichomes. 



/. Crystal bearing fibers from vascular tissue. 



g. Crystals. 



h. Bast of vascular bundles. 



