VEGETABLE POWDERS 



467 



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Fig. 163. RHUS GLABRA FRUIT. 



a, 6. Deep red many celled trichomes. 



c. Colorless trichomes. 



d. Outer layer of seed coat, lateral view. 



e. Thick-walled porous cells of testa. 



/. Colorless crystal bearing layer of testa. 



g. Endosperm cells. 



h. Parenchyma of pericarp. 



i. Epidermal cells of pericarp. 



